CA1336717C - Process for the production of amines, hydroxyamines and aziridines - Google Patents
Process for the production of amines, hydroxyamines and aziridinesInfo
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- CA1336717C CA1336717C CA000586709A CA586709A CA1336717C CA 1336717 C CA1336717 C CA 1336717C CA 000586709 A CA000586709 A CA 000586709A CA 586709 A CA586709 A CA 586709A CA 1336717 C CA1336717 C CA 1336717C
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/02—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms containing only hydrogen and carbon atoms in addition to the ring hetero elements
- C07D295/023—Preparation; Separation; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/64—Preparation of compounds containing amino groups bound to a carbon skeleton by disproportionation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D203/00—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom
- C07D203/02—Preparation by ring-closure
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D205/00—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
- C07D205/02—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/12—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms
- C07D295/125—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
- C07D295/13—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings to an acyclic saturated chain
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
Alkanolamines can be converted to a cyclic or a cyclic alkylamines and aziridines and/or other cyclic or acyclic alkanolamines by contacting the alkanolamines with a molecular sieve selected from the group consisting of (a) non-zeolitic molecular sieves; and (b) zeolites having a silicon:aluminum ratio of at least about 6, the contacting of the alkanolamine starting material with the molecular sieve being effected under conditions effective to convert the alkanolamine starting material into at least one of the specified products.
Description
^ 1 1336il7 PROCESS FOR THE PRODUC$ION OF ~MT~-S.
HYDROXYAMT~-~ AND AZIRIDINES
Field of the Invention This invention relates to a process for the production of amines, hydroxyamines and aziridines.
More specifically, this invention relates to a process for converting an alkanolamine to one or more cyclic or acyclic alkylamines, alkanolamines and aziridines by contacting the alkanolamine with one of a selected group of molecular sieves. By a proper choice of catalysts and/or reaction conditions, the process of the invention can be varied to alter its selectivity to a number of differing and useful products, including ethylenimine.
Background of the Invention Ethylenimine is a potential chemical intermediate for the production of linear ethyleneamine polymers and for the production of various other amines.
However, because of the toxicity and carcinogenicity of ethylenimine, this material poses severe handling difficulties, which make it highly undesirable to store or transport the et~ylenimine, so that desirably a process for the production of ethylenimine should begin from in~Yp n-sive starting materials, and should provide the ethylenimine in a form which permits its direct feed to the ethylenea,nine production unit with~ut intervening isolation or storage of the ethylenimine.
Various processes for the production of ethylenimine are known. For example, ethylenimine may be produced by the reaction of ethylene dichloride with anhydrous ammonia. However, this method suffers from the disadvantages of involving halide use and producing a salt by-product.
One commercially attractive process for the production of ethylenimine is the catalytic dehydration/deamination of monoethanolamine.
Monoethanolamine is-known to convert to a mixture of various alkanolamines, alkylamines and aziridines when contacted with various heterogeneous catalysts. Similar mixtures are obtained from other alkanolamines using the same catalysts. However, typically such reactions produce a complex mixture of products.
Most of the known catalysts for these dehydration/deamination reactions of alkanolamines are oxides of tungsten, tantalum or niobium, in some cases promoted with transition metals such as iron or chromium, the metal oxides usually being disposed upon a support, for example silica or alumina.
For example, U.S. Patent No. 4,289,656, issued September 15, 1981, and U.S. Patent No. 4,358,405, both to Hayes et al., describe a dehydration catalyst and process for making an alkylenaziridine (such as ethylenimine) from an alkanolamine (such as monoethanolamine); the catalyst contains oxides of either tantalum or niobium together with the oxides of iron and chromium, in which the ratios of the metals are: ~
10Fe0.5-2.9CrO.3-1.7 wherein M is tantalum or niobium.
U.S. Patent No. 4,301,036, issued November 17, 1981 to Childress et al., describes a dehydration catalyst for the dehydration of alkanolamines to alkylenaziridines. This dehydration catalyst is prepared by applying a solution of a tungsten salt on to a low surface area support (usually silicon carbide), calcining the salt to tungsten oxide, and thereafter applying silica to the tungsten-coated support so as to form a coating of silica over the tungsten.
U.S. Patent No. 4,337,175, issued June 29, 1982 to Ramirez, describes a dehydration catalyst for the dehydration of alkanolamines to alkylenaziridines.
This dehydration catalyst consists essentially of an oxide of tantalum or niobium with an alkaline earth metal oxide as a promoter on an inert support, for example a low surface area, high purity alumina.
Other catalysts have been used for the production and conversion of monoalkanolamines. For example, U.S. Patent No. 4,524,143, issued June 18, 1985 to Vanderpool, describes a process for the production of linear polyethylenepolyamines from ethylenediamine and monoethanolamine using thermally activated pelleted catalyst compositions comprising zirconium silicate having phosphorus deposited t~hereon.
The relatively complex mixtures produced by these prior art processes pose obvious problems of s separation. In addition, the relative proportions in which the various products are produced are rarely optimal with regard to the commercial demand for, and selling prices of, the various products, and thus it would be highly advantageous to be able to vary the product distribution to increase the proportions of the more valuable products produced.
Because of ~heir microporous structure, with pores of uniform size, molecular sieves offer the possibility of modifying the product distribution obtained in the aforementioned dehydration/deamination reactions of alkanolamines. However, the present inventors are aware of only one patent (U.S. Patent No.
HYDROXYAMT~-~ AND AZIRIDINES
Field of the Invention This invention relates to a process for the production of amines, hydroxyamines and aziridines.
More specifically, this invention relates to a process for converting an alkanolamine to one or more cyclic or acyclic alkylamines, alkanolamines and aziridines by contacting the alkanolamine with one of a selected group of molecular sieves. By a proper choice of catalysts and/or reaction conditions, the process of the invention can be varied to alter its selectivity to a number of differing and useful products, including ethylenimine.
Background of the Invention Ethylenimine is a potential chemical intermediate for the production of linear ethyleneamine polymers and for the production of various other amines.
However, because of the toxicity and carcinogenicity of ethylenimine, this material poses severe handling difficulties, which make it highly undesirable to store or transport the et~ylenimine, so that desirably a process for the production of ethylenimine should begin from in~Yp n-sive starting materials, and should provide the ethylenimine in a form which permits its direct feed to the ethylenea,nine production unit with~ut intervening isolation or storage of the ethylenimine.
Various processes for the production of ethylenimine are known. For example, ethylenimine may be produced by the reaction of ethylene dichloride with anhydrous ammonia. However, this method suffers from the disadvantages of involving halide use and producing a salt by-product.
One commercially attractive process for the production of ethylenimine is the catalytic dehydration/deamination of monoethanolamine.
Monoethanolamine is-known to convert to a mixture of various alkanolamines, alkylamines and aziridines when contacted with various heterogeneous catalysts. Similar mixtures are obtained from other alkanolamines using the same catalysts. However, typically such reactions produce a complex mixture of products.
Most of the known catalysts for these dehydration/deamination reactions of alkanolamines are oxides of tungsten, tantalum or niobium, in some cases promoted with transition metals such as iron or chromium, the metal oxides usually being disposed upon a support, for example silica or alumina.
For example, U.S. Patent No. 4,289,656, issued September 15, 1981, and U.S. Patent No. 4,358,405, both to Hayes et al., describe a dehydration catalyst and process for making an alkylenaziridine (such as ethylenimine) from an alkanolamine (such as monoethanolamine); the catalyst contains oxides of either tantalum or niobium together with the oxides of iron and chromium, in which the ratios of the metals are: ~
10Fe0.5-2.9CrO.3-1.7 wherein M is tantalum or niobium.
U.S. Patent No. 4,301,036, issued November 17, 1981 to Childress et al., describes a dehydration catalyst for the dehydration of alkanolamines to alkylenaziridines. This dehydration catalyst is prepared by applying a solution of a tungsten salt on to a low surface area support (usually silicon carbide), calcining the salt to tungsten oxide, and thereafter applying silica to the tungsten-coated support so as to form a coating of silica over the tungsten.
U.S. Patent No. 4,337,175, issued June 29, 1982 to Ramirez, describes a dehydration catalyst for the dehydration of alkanolamines to alkylenaziridines.
This dehydration catalyst consists essentially of an oxide of tantalum or niobium with an alkaline earth metal oxide as a promoter on an inert support, for example a low surface area, high purity alumina.
Other catalysts have been used for the production and conversion of monoalkanolamines. For example, U.S. Patent No. 4,524,143, issued June 18, 1985 to Vanderpool, describes a process for the production of linear polyethylenepolyamines from ethylenediamine and monoethanolamine using thermally activated pelleted catalyst compositions comprising zirconium silicate having phosphorus deposited t~hereon.
The relatively complex mixtures produced by these prior art processes pose obvious problems of s separation. In addition, the relative proportions in which the various products are produced are rarely optimal with regard to the commercial demand for, and selling prices of, the various products, and thus it would be highly advantageous to be able to vary the product distribution to increase the proportions of the more valuable products produced.
Because of ~heir microporous structure, with pores of uniform size, molecular sieves offer the possibility of modifying the product distribution obtained in the aforementioned dehydration/deamination reactions of alkanolamines. However, the present inventors are aware of only one patent (U.S. Patent No.
3,956,329) describing the use of molecular sieves in these reactions, and in this patent the moiecular sieves used are conventional zeolite aluminosilicates produced by direct synthesis and having silicon:aluminum ratios less then 6.
It has now been discovered that the product distribution obtained in the aforementioned dehydration/deamination reactions of alkanolamines can be improved by using as the catalyst in such reactions certain selected molecular sieves.
~5~ 1336717 SummarY of the Invention This invention provides a process for the conversion of a hydroxyalkylamine starting material to at least one of an amine, a different hydroxyalkylamine and an aziridine, which process comprises contacting the starting material with a molecular sieve selected from the group consisting of (a) non-zeolitic molecular sieves; and (b) zeolites having a silicon:aluminum ratio of at least about 6, the contacting of the starting material with the molecular sieve being effected under conditions effective to convert the starting material into at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine.
Detailed Description of the Invention As already mentioned, the molecular sieves used in the process of the present invention are of three types, namely (a) non-zeolitic molecular sieves;
and (b) zeolites having a silicon:aluminum ratio of at least about 6 (hereinafter referred to as "high-silica zeolites"). The term "non-zeolitic molecular sieve" is used herein to mean non-zeolitic molecular sieves of the aluminophosphate and silicoaluminophosphate types. Such non-zeolitic molecular sieves comprise a large number of aluminophosphates and silicoaluminophosphates having a variety of crystal structures, which may include one or more other elements in addition to aluminum, phosphorus and silicon. Since many of the non-zeolitic molecular sieves are not described in U.S. Patents, and some are not described in publically-available literature, much material describing these non-zeolitic molecular sieves has to be repeated herein. However, for the convenience of the reader, the manner in which the molecular sieves are used in the process of the present invention will first be described, and thereafter the chemical nature, and methods for the preparation, of the molecular sieves will be described.
PROCESS OF THE I~v~NllON
As already mentioned, in the process of the present invention an alkanolamine starting material is contacted with one of a selected group of molecular sieves to produce at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine. The process of the present invention is especially useful for the conversion of monoethanolamine to at least one of ethylenimine, piperazine, substituted piperazines, pyrazine, aminoethanolamine, diethanolamine, ethylenediamine, substituted ethyleneimines, ethylamine, acetonitrile and morpholine, but may also be used for the conversion of other ~lk~nolamines~ for example the conversion of propanolamine (~-hydroxypropylamine) to propylenimine (2-methylaziridine) and other products.
The products of the process of the present invention may include both acyclic and cyclic amines and hydroxyalkylamines. The cyclic products may include both monocyclic materials, for example piperazine, pyrazine and morpholine, and products containing more tkan one ring. For example, it has been found that, under certain conditions, when one or more of monoethanolamine, piperazine, ethylene glycol, aminoethylpiperazine, hydroxyethylpiperazine, ethylenediamine and other ethyleneamines and ethanolamines (or certain other starting materials) are subjected to the process of the present invention the products selectively include 1,4-diazabicyclot2,2,2]octane (DABCO). Also, it has been found that, under certain conditions, when one or more of piperazine, propylene glycol, isopropanolamine and other methylated ethyleneamines and methylated ethanolamines (or certain other starting materials) are subjected to the process of the present invention the products selectively include a mixture of 2-methyl-1,4-diazabicyclo~2,2,2]octane (methyl DABC0) and 1,4-diazabicyclo[2,2,2]octane (DABCO). The preferred catalysts for the above conversions include Silicalite, a microporous form of silica described in U.S. Patent No. 4,061,724 issued December 6, 1977 to R.W. Grose et al., and Silicalite treated with phosphoric acid or phosphoric acid equivalents such as diammonium hydrogen phosphate.
Also as already mentioned, the aluminophosphate or silicoaluminophosphate non-zeolitic molecular sieves useful in the process of the present invention are described in detail below. Examples of such non-zeolitic molecular sieves which may be used in the present invention include:
(a) the AlPO4's described and claimed in U.S. Patent 4,310,440, issued January 12, 1982 to Wilson et al.; illustrative AlPO4 species are AlPO4-5, AlPO4-11, AlPO4-14, AlPO4-17 and AlPO4-31;
(b) the magnesium, manganese, cobalt and zinc aluminophosphate molecular sieves described and claimed in U.S. Patent 4,567,029, issued January 28, 1986 to Wilson et al.; illustrative species are MgAPO-ll, MgAPO-34, MgAPO-35 and CoAPO-34;
(c) the iron aluminophosphate molecular sieves described and claimed in U.S. Patent 4,554,143, issued November 19, 1985 to Messina et al.; an illustrative species is FeAPO-ll;
(d) the silicoaluminophosphate molecular sieves described and claimed in U.S. Patent 4,440,871 issued April 23, 1984 to Lok et al.;
illustrative species are SAPO-5 and SAPO-34;
(e) the magnesium silicoaluminophosphate molecular sieves described and claimed in U.S.
, ~. ;.
,,~
Patent No. 4,758,419; an illustrative species is MgAPSO-34; and (f) the cobalt silicoaluminophosphate molecular sieves described and claimed in U.S.
Patent No. 4,744,970; an illustrative species is CoAPSO-34.
The preferred zeolites having a silicon:aluminum ratio of at least about 6 for use in the process of the present invention are those described and claimed in U.S. Patent No. 4,257,885, issued March 24, 1981 to Grose et al. and assigned to the same assignee as this application. These high-silica zeolites have a structure related to the pentasil type, and are prepared by crystallization from a reaction mixture containing a metal cation selected from Groups I and II of the Periodic System of Elements, particularly lithium, barium, calcium and strontium. A particularly preferred species of this group of zeolites is LZ-105, manufactured by Union Carbide Corporation.
It is well-known to those skilled in the art of molecular sieve catalysis that many molecular sieve catalyzed reactions operate by Bronsted acid catalysis. Experimentally, the relative Bronsted acidities of molecular sieves can be determined from the rates at which they catalyze hydrocarbon cracking; the higher the acidity, the higher the n-butane cracking rate constant. However, there is no significant correlation between the f -lo- 1336717 n-butane cracking rate constants of the various molecular sieves and their activities in the process of the present invention. Moreover, some of the AlPO4 aluminophosphate molecular sieves of U.S. Patent No.
4,310, 440 (described in detail below), exhibit relatively high activity in the process of the present invention, despite the fact that, because of their charge-balanced framework, these materials exhibit virtually no Bronsted acidity.
Moreover, the activity of the catalysts in the process of the present invention is not simply a function of pore size, since significant activities have been achieved with molecular sieves having pore sizes ranging from 4.3 to 8 A.
One factor which does appear to affect the selectivity of the catalyst to particular products is the ability of the catalyst to adsorb these products.
For example, in the preferred process of the present invention in which monoethanolamine is converted to ethylenimine and other products, it has been found that molecular sieves which strongly adsorb ethylenimine do not produce significant amounts of ethylenimine, even though they are active in the conversion of monoethanolamine to other products. Similar results may be expected in, for example, the conversion of monopropanolamine to propylenimine.
- 13~6717-In their as-synthesized form, the non-zeolitic molecular sieves contain within their internal pore systems at least one form of the organic templating agents used in their synthesis. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation, and indeed this is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular species of molecular sieve. As a general rule the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the molecular sieve and must be removed by calcining the molecular sieve in air at temperatures of 200- to 700-C, preferably about 350 to about 600C, to thermally degrade the organic species. In a few instances the pores of the molecular sieve are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures, such as hydrotreating or chemical treatment such as solvent extraction, which will be familiar to those skilled in the molecular sieve art. In some cases, the organic templating agent may be removed in situ by placing the molecular sieve still containing the organic templating agent in the reactor, so that the organic templating agent is removed under reaction conditions.
The process of the present invention may be conducted with the alkanolamine starting material in the liquid phase. However, in view of the temperatures which are needed ln practice to carry out the process of the present invention at an economical rate, it is preferred that the process of the present invention be operated as a heterogeneous, gas phase reaction with the starting material in the gaseous phase, since a gas phase process can be run at higher temperatures under relatively moderate pressures (typically of the order of a few atmospheres) using comparàtively inexpensive equipment.
In such a gas phase process, the starting material may be mixed with a carrier gas (such as nitrogen or ammonia), while being contacted with the molecular sieve; the carrier gas should of course be chosen so that it does not prevent the preparation of the desired products. However, the use of such a carrier gas is not essential in the process of the present invention, which can be operated using pure alkanolamine starting material as the gaseous feed. The degree of dilution of the starting material with such an inert carrier gas may vary considerably depending upon any process constraints restricting the use of inert diluents. (For example, in commercial production, the use of very large quantities of inert carrier gas is disadvantageous due to the-co~st of pumping large volumes of gas and increased difficulty in isolating the product, which increase the energy costs of the process.) If the process of the present invention is to be carried out using an inert gas, in general it is recommended that the alkanolamine starting material constitute from about 1 to about 95, and preferably about 9 to about 30, mole percent of the starting material/inert gas feed. Increasing the dilution of the starting material tends to increase the selectivity of the reaction to the particular products desired, but is otherwise disadvantageous.
Selection of the temperature at which the process of the present invention is to be conducted involves a compromise between selectivity to the desired product(s) and conversion of the alkanolamine starting material. It is recommended that the process of the present invention be condùcted at a temperature in the range of about 250-C to about 500-C; below this temperature range, the reaction tends to proceed too slowly, while at very high temperatures, the selectivity to the desired products decreases dramatically. At least for monoethanolamine conversion, the preferred temperature range is from about 350-C to about 425-C.
The process of the present invention can be run over a wide range of pressures ranging from atmospheric or sub-atmospheric pressures to looo psig.
(6.9 MPa.) or more. However, since the use of very high pressures has not been observed to confer any - significant advantages but increases equipment costs, it is recommended that the process of the present invention be carried out at a pressure of from about atmospheric pressure to about 1000 psig. (about 7 MPa.).
The process of the present invention can also be carried out over a wide range of weight hourly space velocities of the alkanolamine starting material. For example, weight hourly space velocities of from about 0.1 to about 50 may be employed, with the preferred range of weight hourly space velocity being from about 0.5 to about 10, based on the starting material.
The molecular sieve catalysts used in the process of the present invention enable the reaction to be carried out at high conversions. As illustrated in the Examples below, the process of the present invention can be carried out at a conversion of at least about 30%-As with some reactions catalyzed by molecular - sieves, the conversion achieved in the process of the present invention may tend to fall as the time for which the molecular sieve catalyst has been used in the process increases. If the molecular sieve catalysts become deactivated, then the deactivated catalyst can readily be regenerated by heating in air at an -15- , 1336717 appropriate temperature (typically about 500 D C) and for an appropriate period (typically one hour). It is one of the advantages of the process of the present invention that at least some of the instant catalysts can be run for at least 40 hours of operation without the need for reactivation, whereas some of the prior art catalysts used for the same conversions rapidly deactivate.
The molecular sieve may be modified by depositing or impregnating the molecular sieve with cations, anions or salts so as to improve its efficacy as a catalyst in the process of the present invention.
Techniques which may be employed to effect the deposition or impregnation of a molecular sieve are generally known in the art. Such techniques may involve such procedures as (1) impregnating the molecular sieve with a solution comprising a solvent or solubilizing agent of one or more such modifying materials in an amount sufficient to deposit the desired weight of such materials in the molecular sieve and/or (2) exchanging the molecular sieve with a solution containing the modifying material. The impregnation or deposition of the modifying materials may generally be accomplished by heating the molecular sieve at an elevated temperature to evaporate any liquid present to effect deposition or impregnation of the modifying material on to the interior and/or exterior surface of the molecular sieve, or by the exchange of cations present in the molecular sieve with cations that provide for the desired properties (provided of course that the molecular sieve is one having a significant ion-exchange capacity).
Alternatively, the modifying material may be formed on the molecular sieve from a solution, an emulsion or a slurry containing the modifying materiaL
Impregnation or exchange procedures are generally the preferred techniques because they utilize and introduce the modifying material more efficiently than other procedures such as coating procedures since a coating procedure is generally not able to effect substantial introduction of the modifying material on to the interior surfaces of the molecular sieve. In addition, coated materials are more generally susceptible to the loss of the modifying materials by abrasion.
Suitable modifying materials include alkali metals, alkaline earth metals, transition metals and the salts thereof including inorganic and organic salts such - as nitrates, halides, hydroxides, sulfates and carboxylates. Other modifying materials generally employed in the art are also believed to be employable in the molecular sieves.
In carrying out the process of the present invention, the molecular sieves may be admixed (blended) or provided sequentially to other materials which may provide some property which is beneficial under process conditions, such as improved temperature resistance or improved catalyst life by minimization of coking, or which are simply inert under the process conditions used. Such materials may include synthetic or naturally-occurring substances as well as inorganic materials such as clays, silicas, aluminas, metal oxides and mixtures thereof. In addition, the molecular sieves may be formed with materials such as silica, alumina, silica-alumina, silica-magnesia, silica-zirconia, silica-thoria, silica-berylia, and silica-titania, as well as ternary compositions, such as silica-alumina-thoria, silica-alumina-zirconia and clays present as binders. The relative proportions of the above materials and the-molecular sieves may vary widely with the molecular sievé content ranging between about 1 and about 99 percent by weight of the composite.
~ he following Examples are provided to further illustrate the process of the present invention, but are not limitative thereof. Unless otherwise specified, all parts, proportions etc. are by weight.
EXAMPLES
The following Examples illustrate the use of AlP04-5, AlP04-11, AlP04-14, AlP04-17, AlP04-31, CoAP0-34, FeAP0-34, MgAP0-11, MgAP0-34, MgAP0-35, SAP0-5, SAP0-34, CoAPS0-34, MgAPS0-34 and LZ-105 in the process of the present invention. The characteristic X-13~6717 ray tables for AlPO4-5, AlPO4-11, AlPO4-14, and AlPO4-17 are given in U.S. Patent No. ~4,310,440 at Table 2 in column 8, Table 8 in column 15, Table 12 in column 21, and Table 15 in column 26 respectively. The ALPO4-31 was produced as described in U.S. Patent No. 4,310,440, Example 54. The characteristic X-ray tables for CoAPO-34, MgAP0-11, MgAPO-34 and MgAPO-35 are given in U.S. Patent No. 4,567,029 at Table XLI in column 91, Table III in column 17, Table X in column 31 and Table XI in column 33 respectively. The characteristic X-ray table for FeAPO-34 is given in U.S. Patent No. 4,554,143 at Table XI in column 29. The characteristic X-ray tables for SAPO-5 and SAPO-34 are given in U.S. Patent No. 4,440,871 at Table I in column 20 and Table XI in column 44 respectively. The characteristic X-ray tables for CoAPSO-34 and MgAPSO-34 are given below:
CoAPSO-34 2e d (A) Relative Intensity 9.4 - 9.8 9.41 - 9.03 s - vs 2012.86 - 13-.06 6.86 - 6.76 w 14.08 - 14.30 6.28 - 6.19 w - m 15.90 - 16.20 5.57 - 5.47 vw- m 20.60 - 20.83 4.31 - 4.26 w - vs 30.50 - 30.80 2.931 - 2.903w - m MgAPS0-34 2~ d (A~ Relative Intensity 9.3 - 9.7 9.51 - 9.12 vs 15.8 - 16.3 5.61 - 5.44 w - m 20.25 - 21.0 4.39 - 4.23 m - vs 3025.7 - 26.3 3.466 - 3.389vw- m 30.0 - 30.8 2.979 - 2.903vw- m 30.9 - 31.4 2.894 - 2.849w - m Ex~erimental Conditions The various molecul~ar sieve catalysts were prepared as described below, calcined in air following synthesis to remove the organic templating agent, and then calcined for one hour under nitrogen at the reaction temperature prior to use. Between each run, the catalysts were regenerated by calcination at 500C
in air for 1 to 12 hours.
Two separate microreactors were used. The first micro reactor consisted of a 1/4 inch (6 mm.) diameter stainless steel U-tube heated in a fluidized sand bath. Approximately l gram of catalyst as the powder was dispersed among several grams of 20-30 U. S.
mesh quartz chips and placed in the heated zone of the reactor. Connected to the inlet of the reactor were a source of nitrogen or ammonia carrier gas and a liquid feed line containing monoethanolamine connected to a high pressure liquid chromatography (HPLC) type solvent pump. To the outlet of the U-tube was connected a room temperature liquids trap, followed by a heated port for gas sampling. It was determined that ethylenimine was not being collected in the liquids trap to any appreciable extent. The gases from the heated port were analyzed by gas chromatography on a 6 foot by 1/8 inch (1829 by 3 mm.) column containing Chromosorb 101. The liquid samples from the liquids trap were analyzed by amine derivatization with N-methylbistrifluoroacetamide.
Because of the difficulties of quantitative analysis in two different phases, later experiments used a second microreactor consisting of a 3/8 inch (9 mm.) diameter stainless steel tube encased in a 1 inch (25 mm.) diameter sheath of stainless steel heated with an electric split furnace.
Approximately 1 gram of catalyst as the powder was dispersed among about 5 grams of 20-30 U. S. mesh quartz chips and placed in the heated zone of the reactor. The reactor tube was disposed vertically with a downward flow of reactants and products. The same feed line and source of flow gas were employed as in the first microreactor. Immediately below the reactor was disposed a cold trap kept at 0C. Gas chromatographic analysis of the outlet gas indicated that all of the ethylenimine produced was retained in the cold trap and ammonia and only very small amounts of a material with a retention time similar to that of ethylene passed the trap. The products of the reaction collected in the cold trap were analyzed by gas chromatography on a 12 foot by 1/8 inch (3658 by 3 mm.) column containing TERGITOL*
non-ionic TMN (a polyether liquid phase) and 3 percent sodium methylate on 60/80 Chromasorb W-NAW, or on a 10 foot by 1/8 inch (3048 by 3 mm.) column containing 8 percent TERGITOL* non-ionic E68 and 2 percent potassium hydroxide.
Several experiments were run using both microreactors, and these experiments confirmed that no * Registered Trademark D~14643 -21- 133671~ -appreciable difference in results were produced by the change in reactors.
Examle 1 The first microreactor described above was charged with 1.0 g. of AlPO4-14 and heated to 400C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 1.6 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 70 percent, with a product distribution (based on converted monoethanolamine) as follows:
Product Percentage Piperazine 40 Aminoethylpiperadine 14 Diethanolamine 4 Triethanolamine 10 Aminoethylethanolamine 4 Diethylenetriamine 4 Ethylenimine 3, together with minor amounts of other amines and Alk~nolamines.
Examle 2 The first microreactor described above was charged with 1.0 g. of SAPO-5 and heated to 400C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 0.4 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 30 percent, with a product distribution (based on converted 5 monoethanolamine) as follows: -Product Percentage Piperazine 45 Aminoethylpiperazine 18 Morpholine 15, together with minor amounts of other alkylamines and alkanolamines.
Exam~le 3 The first microreactor described above was charged with 1.0 g. of AlPO4-11 and heated to 350C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 0.5 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 5 percent, with ethylenimine constituting about 40 percent of the products, the other products being piperidine, piperazine, ethylamine, morpholine and other nitrogen and/or oxygen-containing products.
Examples 4-16 Various molecular sieves were tested for their activities in the process of the present invention in the same manner as in Examples 1-3 above, except that in 133~717 some cases the second microreactor described above was used. Except as specified in Table 1 below, the experiments were conducted with 1 gram of catalyst in the microreactor, at a reaction temperature of 375C, with nitrogen gas flowing at a rate of 40 ml/min. and monoethanolamine flowing at a rate of 1.6 ml/hr. The results are shown in Table 1 below, in which the following abbreviations are used:
Abbreviation Full Term 10 Conv. Conversion EI Ethylenimine PIP Piperazine AEP Aminoethylpiperazine AEEA Aminoethylethanolamine 15 DEA Diethanolamine TEA Triethanolamine DETA Diethylenetriamine All values for products are percentages based upon the converted monoethanolamine.
TAkr.~ ~
4 ~ 4- 17 .70 0 45 2~ 5 5 10 3 12 AlP~4-31a'~ SO O 40 30 ~ 3 lQ 4 11 6 ~1~4~ 3.0 10 3S 20 ~ 4 4 4 13 C~34 S 3D 10 0 10 ~5 Cl 10 25 & f~ 5 10 ~0 10 l~i 10 0 15 3t:~
9 FeA~UC 3~ 0 4~ 30 4 5 6 ~ g ~11 5 ;~!0 ;113 ~0 5 S 10 0 :L0 lb ~ 5 ~0 10 11:110 15 S 5 15 35 5 2~ ~0 5 Sl~ lC 5 ~3 Ç~34 3~ ~ 3S 3t3 3 4 10 4 14 J~ 3~ 5 10 2~ 20 ~ 5 0 10 30 c; ~3~L 5 ~ ~13 10 ~ 10 ~0 lQ~i3t~ ~ 3~ 20 5 ;20 10 5 ~0 ~ - ~e~per~tusc 3 5 0 - C
b. Nitr~ te 20 ~lJm~ n .
c. ~~pt~a~re 400~C-Att~nt~un ~ dl~ected ~0 ~e ~:O-p~
~0 a~plic~ S,r ~cu~ ~ olgon an~ sSe~en ~ ~1$~, O~
*;r~ aat~ ~re~,t;h ~C~di~ri p~tent appl~. Ser. N~. 58~, ~74-0 which ~eEcri~ an~ clal~ ~ 2roce~s fs: r the ~ehyd~tion a ,~ -hy~roxya~ ne *o the corresponding az ~ ridine, e~pe~i~lly ~nce~anol~mi~ to ethyleniDl~ne~ ~he 2~ c~t~lys~ u~ is ~ 13o~e~lar S~e~re, ~hich is loaded with ~ra a~ali Qr al~ lne e~a~n~ -~14 ~i43 NON-ZEOLITIC MOLECULAR SIEVES 13~717 The term "non-zeolitic molecular sieves" or "NZMS" is defined in the instant invention to include the "SAPO" molecular sieves of U.S. Patent No. 4,440,871, "ELAPSO" molecular sieves as disclosed in U.S. Patent No. 4,793,984 and certain "AlPO4", "MeAPO", "FeAPO", "TAPO" and "ELAPO"
molecular sieves, as hereinafter described.
Crystalline "AlPO4" aluminophosphates are disclosed in U.S. Patent No. 4,310,440 issued January 12, 1982; crystalline metal aluminophosphates (MeAPOs where ~Me~ is at least one of Mg, Mn, Co and Zn) are disclosed in U.S. Patent No. 4,567,029, issued January 28, 1986; crystalline ferroaluminophosphates (FeAPOs) are disclosed in U.S. Patent No. 4,554,143, issued November 19, 1985; titanium aluminophosphates (TAPOs) are disclosed in U.S. Patent No. 4,500,651, issued February 19, 1985; certain non-zeolitic molecular sieves ("ELAPO") are disclosed in EPC
Patent Application 85104386.9 (Publication No.
0158976, published October 13, 1985) and 85104388.5 (Publication No. 158349, published October 16, 1985); and ELAPSO molecular sieves are disclosed in U.S. Patent No. 4,793,984 (EPC Publication No.
0159624, published October 30, 1985).
The nomenclature employed herein to refer to the members of the aforementioned NZMSs is consistent with that employed in the aforementioned applications or patents. A particular member of a class is generally referred to as a "-n" species wherein "n" is an integer, e.g., SAPO-ll, MeAPO-ll and ELAPSO-31. In the following discussion on NZMSs set forth hereinafter the mole fraction of the NZMSs are defined as compositional values which are plotted in phase diagrams in each of the identified patents, published applications or copending applications.
ELAPSO MOLECULAR SIEVES
~ 'ELAPSO" molecular sieves are described in U.S. Patent No. 4,793,984 as crystalline molecular sieves having three-dimensional microporous framework structures of ELO2, A102, PO2, SiO2 oxide units and having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ELWAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwAlxPySiz)02 and has a value of from zero to about 0.3; "EL" represents at least one element capable of forming a three dimensional oxide framework, "EL" being characterized as an element having a mean "T-O" distance in tetrahedral oxide structures between about 1.51 Angstroms and about 2.06 Angstroms, "EL" having a cation electronegativity between about 125 kcal/g-atom to about 310 kcal/gm-atom and "EL" being capable of forming stable M-O-P, M-O-Al or M-O-M bonds in crystalline three dimensional oxide structures having a "M-O" bond dissociation energy greater than about 59 kcal/g-atom at 298-K; and "w", "x", "y" and "z" represent the mole fractions of "EL", aluminum, phosphorus and silicon, respectively, present as framework oxides, said mole fractions being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.39-(O.Ol)p O.Ol(p + 1) B 0.39-(O.Olp) 0.60 O.Ol(p + 1) C 0.01 0.60 0039 D 0.01 0.01 0.98 E 0.60 0.01 0.39 where "p" is an integer corresponding to the number of elements "El" in the (ElwAlxPySiz)02 constituent.
The "ELAPSO" molecular sieves are also described as crystalline molecular sieves having three-dimensional microporous framework structures of EL02, A102, SiO2 and P02 tetrahedral oxide units and having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ELWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwAlxPySiz)02 and has a value of from zero to about 0.3; "EL" represents at least one element capable of forming a framework tetrahedral oxide and is selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc; and ~'w", "x", "y" and "z" represent the mole fractions of "EL", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, said mole fractions being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.60 0.39-(O.Ol)p O.Ol(p + 1) b 0.39-(O.Olp) 0.60 O.Ol(p + 1) c 0.10 0.55 0.35 d 0.55 0.10 0.35 where "p" is as above defined.
The "ELAPSO" molecular sieves include numerous species which are intended herein to be within the scope of the term "non-zeolitic molecular sieves" such being disclosed in the following commonly ,., ~ .~-, assigned patents or applications, [(A) following a serial number indicates that the application is abandoned and (C) indicates that the application is a continuation of the immediately preceding patent or application]:
13~6717 U.S. Patent/Serial No. Filed NZMS
4,737,353 March 20, 1986 BeAPSO
4,738,837 April 15, 1986 CAPSO
4,735,806 March 31, 1986 GaAPSO
4,992,250 April 15, 1986 GeAPSO
4,684,617 April 13, 1984 TiAPSO
4,801,309(C) May 13, 1987 TiAPSO
4,758,419 April 13, 1984 MgAPSO
4,686,092 April 13, 1984 MnAPSO
4,744,970 April 13, 1984 CoAPSO
Can. Pat. No. 1248079 ZnAPSO
4,683,217 April 13, 1984 FeAPSO
Can. Pat. No. 1248080 QuinAPSO
4,956,164(C) June 22, 1987 QuinAPSO
4,741,892 April 13, 1984 QuinAPSO
~ , .
TiAPSO MOLECULAR SIEVES 1 3 3 6 717 The TiAPSO molecular sieves of U.S. Patent No. 4,684,617 and U.S. Patent No. 4,801,309 have three-dimensional microporous framework structures of TiO2, AlO2 ~, PO2+ and SiO2 tetrahedral oxide units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (TiWAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of ~R~' present per mole of (TiwAlxPySiz)O2 and has a value from zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 ~' In a subclass of TiAPSo molecular sieves the values "w", "x", "y" and~"z" in the above formula are within the tetragonal compositional area defined by points a, b, c and d, said points a, b, c and d representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y rz + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c o.lO 0.55 0.35 d 0.55 0.10 0.35 TiAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing active sources of titanium, silicon, aluminum and phosphorus, and preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50 C and 250 C, and preferably between lOO-C and 200-C until crystals of the TiAPSo product are obtained, usually a period of from hours to several weeks. Generally, the - 1~36717 . -33-crystallization time is from about 2 hours to about 30 days and typically from about 4 hours to about'20 days.
The product is recovered by any convenient method such - as centrifugation or filtration.
S In synthesizing the TiAPSos, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (TiwAlxPySiz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w~, "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxides are prepared as follows:
Preparative Reagents MgAPSO compositions are prepared using numerous reagents. Typical reagents which may be employed to prepare MgAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) H3PO4: 85 weight percent aqueous phosphoric acid in water;
(d) Tiipro: titanium isopropoxide;
~ ~,.
-3s- 133 6717 (e) TEAOH: 40 weight percent aqueous ~
solution of tetraethyla~monium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3NH: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N);
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H); and (j) C-hex: cyclohexylamine.
Preparative Procedures TiAPSOs may be prepared by forming a starting reaction mixture by adding the H3PO4 and the water.
This mixture is mixed and to this mixture aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the LUDOX-LS is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed.
The titanium isopropoxide is added to the above mixture and the resulting mixture blended until a homogeneous mixture is observed. The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. When the organic templating agent is quinuclidine the procedure is modified such that the quinuclidine is dissolved in about one half the water and accordingly the H3PO4 is mixed with about one half the water. (The pH of the mixture is measured and adjusted for temperature). The mixture is then placed in a lined (polytetrafluoroethylene) lined stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
The products are removed from the reaction vessel and cooled.
MqAPSO MOLECULAR SIEVES
The MgAPSO molecular sieves of U.S. Patent No. 4,758,419 have three-dimensional microporous framework structures of MgO22-, AlO2-, PO2+ and SiO2 tetrahedral oxide units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MgwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MgwAlxPySiz)O2 and has a value from zero (0) to about 0.3; and ~w~, "x", "y" and "z" represent the mole fractions of magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and _37_ 1336717 each preferably has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows: .
Mole Fraction Point x y (z + w~
A 0.60 0.38 0.02 B 0.39 0.59 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the MgAPSO
molecular sieves the values "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 MgAPSO compositions are generally synthesized by hydrothermal crystallization for an effective time at effective pressures and temperatures from a reaction mixture containing reactive sources of magnesium, silicon, aluminum and phosphorus, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of~the Periodic Table, and may be an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between lOO-C and 200-C until crystals of the MgAPSO product are obtained, usually a period of from several hours to several weeks. Generally, the crystallization period will be from about 2 hours to about 30 days with it typically being from about 4 hours to about 20 days for obtaining MgAPSO crystals. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MgAPS0 compositions, it is preferred to employ reaction mixture compositions expressed in terms of the molar ratios as follows:
aR : (MgWAlxpySiz)O2 : bH20 wherein "R" is an organic templating agent; "a" is thè
amount of organic templating agent "R" and can have a value within the range of from zero (0) to about 6 and is more preferably an effective amount greater than zero to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of ~39~ 133 6717 magnesium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction co~osition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxides are prepared as follows:
PreDarative Rea~ents MgAPSO compositions are prepared using numerous reagents. Typical reagents which may be employed to prepare MgAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea for hydrated pseudoboehmite;
_40_ 1336717 (c) LUDOX-LS: Trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(d) Mg(Ac)2: magnesium acetate tetrahydrate, Mg(C2H3O2).4H2O;
(e) H3PO4: 85 weight percent aqueous phosphoric acid in water;
(f) TBAOH: tetrabutylammonium hydroxide (40 wt. % in water);
(g) Pr2NH: di-n-propylamine;
(h) Pr3NH: tri-n-propylamine;
(i) Quin: Quinuclidine;
(j) MQuin: Methyl Quinuclidine hydroxide, (17.9% in water);
(k) C-hex: cyclohexylamine;
(1) TEAOH: tetraethylammonium hydroxide (40 wt. % in water);
(m) DEEA: Diethylethanolamine;
(n) i-Pr2NH: di-isopropylamine;
(o) TEABr: tetraethylammonium bromide; and (p) TPAOH: tetrapropylammonium hydroxide (40 wt. % in water).
Preparative Procedures The MgAPSO compositions may be prepared by preparing reaction mixtures having a molar composition expressed as:
eR fMg hAl23 iP2os gsio2 jH2o wherein e, f, g, h, i and j represent the moles of template R, magnesium (expressed as the oxide), SiO2, Al203, P205 (H3PO4 expressed as P205) and H20, respectively.
The reaction mixtures may be prepared by the following representative procedures, designated hereinafter as Methods A, B and C.
Method A
The reaction mixture is prepared by mixing the ground aluminum source (Alipro or CATAPAL) with the H3PO4 and water on a gradual basis with occasional cooling with an ice bath. The resulting mixture is blended until a homogeneous mixture is observed. When the aluminum source is CATAPAL the water and H3PO4 are first mixed with the CATAPAL added thereto. The magnesium acetate is dissolved in a portion of the water and is then added followed by addition of the LUDOX-LS.
The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended until a homogeneous mixture is observed. The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoro-ethylene) stainless steel prèssure vessel and digested at a temperature (150-C or 200-C) for an effective time.
Alternatively, if the digestion temperature is 100-C the final reaction mixture is placed in a lined (polytetrafluoroethylene) screw top bottle for a time.
Digestions aré typically carried out under autogenous pressure. The products are removed from the reaction vessel, cooled and evaluated as set forth hereinafter.
Method B
When method B is employed the organic templating agent is di-n-propylamine. The aluminum source, silicon source and one-half of the water are first mixed and blended until a homogeneous mixture is observed. A second solution was prepared by mixing the remaining water, the H3PO4 and the magnesium acetate.
This solution is then added to the above mixture. The magnesium acetate and H3PO4 solution is then added to the above mixture and blended until a homogeneous mixture is observed. The organic templating agent(s) is/are then added and the resulting reaction mixture digested and product recovered as in Method A.
Method C
Method C is carried out by mixing aluminum isopropoxide, LUDOX LS and water in a blender or by mixing water and aluminum iso-propoxide in a blender 1 3~6717 followed by addition of the LUDOX LS. ~3P~4 and magnesium acetate are then added to the resulting mixture. The organic templating agent is then added to the resulting mixture and digested and product recovered as in Method A.
MnAPSO MOLECULAR SIEVES
The MnAPSO molecular sieves of U.S. Patent No. 4,686,092 have a framework structures of MnO2 -2, AlO2 -, PO2 + and SiO2 tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MnwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~' present per mole of (MnwAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of the elements manganese, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined, as being within the limiting compositional values or points as follows:
~ A
~44~ 1336717 Mole Fraction Point x ` y ~ ~ (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 s C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 The values of w, x, y and z may be as follows:
Mole Fraction 10 Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 MnAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of manganese, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C and about 250 C, and preferably - 13~6717 between about lOO-C and about 200-C until crystals of the MnAPSO product are obtai~ed, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MnA~SO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MnwAlxpysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of manganese, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 13~ 6717 Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w~, "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents MnAPSO compositions may be prepared using numerous reagents. Reagents which may be employed to prepare MnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
. ~
_47_ 1 3 3 6 71 7 (d) H3PO4: 85-weight percent aqueous phosphoric acid:
(e) MnAc: Manganese acetate, Mn(c2H3o2)2.4H2o;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide; and (o) DEEA: 2-diethylaminoethanol.
Preparative Procedures MnAPSOs are prepared by forming a starting reaction mixture by adding the H3PO4 to one half of the quantity of water. This mixture is mixed and to this mixture the aluminum isopropoxide or CATAPAL is added.
This mixture is then blended until a homogeneous mixture is observed. To this mixture the LUDOX LS is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed. A second mixture is prepared using the manganese acetate and the remainder (about 50%) Of the water. The two mixtures are admixed and the resulting mixture blended until a homogeneous mixture is observed.
The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. (The pH of the mixture is measured and adjusted for temperature). The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out at the autogenous pressure.
CoAPSO MOLECULAR SIEVES
The CoAPSO molecular sieves of U.S. Patent No. 4,744,970 have three-dimensional microporous framework structures of CoO2 -2, AlO2 ~, PO2 + and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (cowAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~R~' present per mole of (CowAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminu~, phosphorus and silicon, respectively, present as tetrahedral oxides, where the mole fractions "w", "x", "y" and "z" are each at least 0.01 and are generally defined, as being within the limiting compositional values or points as follows:
. Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CoAPSO
molecular sieves the values of "w", "x", "y", and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10. 0.35 CoAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of cobalt, silicon, aluminum ~ and phosphorus, an organic templating, i.e., structure-- directing, agent, preferably~a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at an effective temperature which is generally between 50-C
and 250-C and preferably between 100~C and 200C until crystals of the CoAPSO product are obtained, usually for an effective time of from several hours to several weeks. Generally the effective crystallization time will be from about 2 hours to about 30 days and typically from about 4 hours to about 20 days. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CoAPSOs, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CowAlxPysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and 300; and "w", "x", "y"
- ~ -51- 1336717 and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01. In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and ~Zll are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point x y fz + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents CoAPSO compositions may be prepared using numerous reagents. Reagents which may be employed to prepared CoAPSOs include:
(a) Alipro: aluminum isopropoxide;
3367l7 : -52-(b) CATAPAL: Tradema~rk of Condea Corporation for pseudoboehmite; t (c) LUDOX-LS: Trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(d) Co(Ac)2: cobalt acetate, Co(C2H3O2)2 4H2 (e) CoSO4: cobalt sulfate, (CoSO4.7H2O);
(f) H3PO4: 85 weight percent phosphoric acid in water;
(g) TBAOH: tetrabutylammonium hydroxide (25 wt % in methanol);
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(l) C-hex: cyclohexylamine;
(m) TEAOH: tetraethylammonium hydroxide (40 wt. % in water);
(n) DEEA: diethanolamine;
(o) TPAOH: tetrapropylammonium hydroxide (40 wt. % in water); and (p) TMAOH: tetramethylammonium hydroxide (40 wt. % in water).
~53~ 133 6717 PreParative-Procedure CoAPSO compositio~s may be prepared by preparing reaction mixtures having a molar composition expressed as:
eR:fCOo:hAl2o3:ip2os gsio2 jH2o wherein e, f, h, i, g and j represent the moles of template R, cobalt (expressed as the oxide), Al203, P205 (H3PO4 expressed as P205), sio2 and H2O, respectively.
The reaction mixtures are prepared by forming a starting reaction mixture comprising the H3P04 and one half of the water. This mixture is stirred and the aluminum source (Alipro or CATAPAL) added. The resulting mixture is blended until a homogeneous mixture is observed. The LUDOX-LS is then added to the resulting mixture and the new mixture blended until a homogeneous mixture is observed. The cobalt source (e.g., Co(Ac)2, Co(S04) or mixtures thereof) is dissolved in the remaining water and combined with the first mixture. The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended for about two to four minutes until a homogeneous mixture is observed.
The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C, 200-C or 225-C) for a time. Digestions are typically carried out at the autogenous pressure. The products are removed from the reaction vessel and cooled.
ZnAPSO MOLECULAR SIEVES
The ZnAPSO molecular sieves of Canadian Patent No. 1248079 comprise framework structures of Zn2 -2, AlO2 -, PO2 + and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ZnwAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of "R~' present per mole of (ZnwAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 -.
_55_- 1336717 .
In a preferred subcIass of ZnAPSO molecular sieves the values "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x - y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.3S
d O.S5 0.10 0.35 ZnAPSO compositions are generally synthesized by hydrothermal crystallization at effective process conditions from a reaction mixture containing active sources of zinc, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element or Group VA of the Periodic Table, and/or optionally an alkali of other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure, at a temperature between 50C and 250-C, and preferably between lOO-C and 200-C until crystals of the ZnAPS0 product are obtained, usually a period of from several hours to several weeks.
Generally the effective crystallization period is from : 56- 1336717 about 2 hours to about 30 days with typical periods of from about 4 hours to about 20 days being employed to obtain ZnAPS0 products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the ZnAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (ZnwAlxPysiz)2 bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, more preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01. In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing zinc, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents ZnAPSO compositions are typically prepared using numerous reagents. Reagents which may be employed to prepare ZnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
` 1336717 (d) H3PO4: 85 weight percent aqueous phosphoric acid;
(e) -ZnAc: Zinc Acetate, Zn(C2H3O2)2.4H2O;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide: -(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) TMAOH: Tetramethylammonium hydroxide pentahydrate, (CH3)4NOH.5H2O;
(i) TPAOH: 40 weight percent aqueous solution of tetrapropylammonium hydroxide, (C3H7)4NOH;
(j) Pr2NH: di-n-propylamine, (C3H7)2NH;
(k) Pr3N: Tri-n-propylamine, (C3H7)3N;
(1) Quin: Quinuclidine, (C7H13N);
(m) C-hex: cyclohexylamine; and (n) DEEA: diethylethanolamine, ( C2H5 ) 2NC2H50H .
Pre~arative Procedure ZnAPSO compositions are typically prepared by forming reaction mixtures having a molar composition expressed as:
eR:fzno:gAl2o3 hp2os isio2 jH2o wherein e, f, g, h, i and j represent the moles of template R, zinc (expressed as the oxide), Al2O3, P2O5 (H3PO4 expressed as P2O5), SiO2 and H2O, respectively.
The reaction mixtures are generally prepared by forming a starting reaction mixture comprising the H3PO4 and a portion of the water.
This mixture is stirred and the aluminum source added. The resulting mixture is blended until a homogeneous mixture is observed. The LUDOX LS is then added to the resulting mixture and the new mixture blended until a homogeneous mixture is observed. The zinc source (zinc acetate) is dissolved in the remaining water and combined with the first mixture. The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended for about two to four minutes until a homogeneous mixture is observed. The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at an effective temperature for an effective time. Digestions are typically carried out under autogenous pressure.
The products are removed from the reaction vessel and cooled.
FeAPSO MOLECULAR SIEVES
The FeAPSO molecular sieves of U.S. Patent No. 4,683,217 have three-dimensional microporous crystal framework structures of FeO2-2, (and/or FeO2~), A102 ~, PO2 + and SiO2 tetrahedral units, and having a unit empirical formula, on an anhydrous basis, of:
~, w x y iZ)02 ~ wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (FewAlxPySiz)O2 and has a value of from zero (0) to about 0.3; the maximum value of "m" in each case depends upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular molecular sieve involved; and "w", "x", "y"
and "z" represent the mole fractions of iron, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, said mole fractions being such that they are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 `~ -61- 1336717 - The values of w, x, y and z may be as follows:~-- -Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 $ b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 The FeAPSOs of the instant invention are generally synthesized by hydrothermal crystallization from a reaction mixture comprising reactive sources of iron, aluminum, phosphorus and silicon, and preferably one or more organic templating agents. Optionally, alkali or other metal(s) may be present in the reaction mixture and may act as templating agents. The reaction mixture is generally placed in a pressure vessel, preferably lined with an inert plastic material, such as polytetrafluoroethylene, and heated, preferably under autogenous pressure, at an effective temperature which is generally between about 50-C and about 2S0-C, and preferably between about 100-C and 200-C, until crystals of the FeAPSO product are obtained, usually a period of from several hours to several weeks. Molecular sieves containing iron, aluminum, phosphorus and silicon as framework tetrahedral oxide units are typically prepared as follows:
- Preparative Reagents ~- -- FeAPSO compositions may be prepared using numerous reagents. Reagents which may employed to prepare FeAPSOs include: .
(a) Alipro: aluminum isopropoxide, Al(ocH(cH3)2)3;
(b) LUDOX-LS: LUDOX-LS is the trademark of Du Pont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) CATAPAL: trademark for hydrated aluminum oxide containing about 75 wt. percent A12O3 (pseudoboehmite phase~ and about 25 wt. percent water;
(d) Fe(Ac)2: Iron (II) acetate;
(e) FeSO4: Iron (II) sulfate hexahydrate;
(f) H3PO4: 8S weight percent phosphoric acid in water;
(g) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(h) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(i) Pr2NH: di-n-propylamine ((C3H7)2NH);
(j) Pr3N: tri-n-propylamine ((C3H7)3N);
(k) Quin: Quinuclidine (C7H13N);
(1) MQuin: Methyl Quinuclidine hydroxide (C7H13NCH3OH);
(m) TMAOH: tetramethylammonium hydroxide ~pentahydrate; and (o) C-hex: cyclohexylamine.
Preparative Procedures a) Reaction mixtures to prepare FeAPSOs are typically prepared by grinding an aluminum isopropoxide in a blender followed by slowly adding a H3PO4 solution with mixing. A solution/dispersion of iron acetate in water is added and then a silica (e.g., LUDOX-LS) is added. The organic templating agent is then added to this mixture, or in some cases one-half of this mixture, and the mixture blended to form a homogeneous mixture.
For example, in one embodiment, the number of moles of each component in the reaction mixture is as follows:
15Com~onent Moles P205 0 . 9 sio2 0.2 FeO* 0.2 20 TEAOH 1.0 * Iron (II) acetate reported as Iron (II) oxide.
The reaction mixture is sealed in a stainless steel pressure vessel lined with polytetrafluoroethylene and heated in an oven at a temperature, time and under autogenous pressure. The solid reaction product is -64- 13~6717 recovered by filtration, washed with water and dried at room temperature.
b) In another embodiment, reaction mixtures are prepared by grinding the aluminum isopropoxide in a blender followed by addition of a solution/dispersion of iron(II) acetate. H3PO4 is added to this mixture and the resulting-mixture blended to form a homogeneous mixture. A silica (e.g., LUDOX-LS) is added to this mixture except that in some instances the silica may be added with the H3PO4. The resulting mixtures were blended until a homogeneous mixture is observed.
Organic templating agent is added to each mixture and the resulting mixtures placed in a stainless steel pressure vessel lined with polytetrafluoroethylene and heated, washed and the product recovered. In this embodiment the number of moles of each component in the reaction mixture is as follows:
Com~onent Moles A123 . 9 SiO2 0.2 FeO* 0.2 Template 1.0 * Iron(II) acetate reported as Iron(II) oxide.
The QuinAPSO quinary molecular sieves of Canadian Patent No. 1248080 and U.S. Patent No.
4,741,892 have three-dimensional microporous framework structures of MO2n, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~R~
present per mole of (MwAlxPySiz)O2 and has a value of from zero (0) to about 0.3; M represents at least two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", ~x", ~y~ and ~'z~ represent the mole fractions of M, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Preferably, M
represents the combination of cobalt and manganese.
The mole fractions "w", "x", "y", and "z" are generally defined as being within the limiting compositional values or points as follows:
. . , Mole Fraction Point x ~ y (z + w) A - 0.60 - 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 Preferably the mole fractions w, x, y and z will fall within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.60 0.37 0.03 b 0.37 0.60 0.03 15 .c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0-.01 0.39 QuinAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements M, aluminum, phosphorus and silicon and preferably an organic templating agent, i.e., structure-directing, agent. The structure-directing agents are preferably a compound of an element of Group VA of the Periodic Table, and may be an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure and at typical effective temperatures between 50-C and 250DC, preferably between 100C and 200-C, until crystals of the QuinAPS0 product are obtained, usually over a period of-from several hours to several weeks. Typical effective crystallization times are from about 2 hours to 30 days with from about 4 hours to about 20 days being generally employed to obtain QuinAPS0 products.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the QuinAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MwAlxpysiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y", and "z" represent the mole fractions of elements M, 2S aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions'"w", 'ix", "y"
and 'oz" are generally defined as being within tee limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.37 0.03 G 0.37 0.60 0.03 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w,~x~ y~ and "z" such that (w + x + y + z) = 1.00 mole. QuinAPSO
compositions were prepared using numerous regents;
the appropriate sources of the various elements M
are the same as those used in the preparation of the various APO and APSO molecular sieves containing the same elementsl as described in detail above and below.
Reagents which may be employed to prepare QuinApSOs include:
(a) Alipro: aluminum isopropoxide, (b) LUDOXLS: LUDOX-LS is the trademark name of DuPont for an aqeuous solution of 30 t ~ ~
.,~
weight percent SiO2 and 0.1 weight percent Na20;~
(c) H3PO4: 85 weight percent phosphoric acid;
(d) MnAc: Manganese acetate, Mn(C2H302)2.4H20 (for QuinAPSOs containing manganese);
(e) CoAc: Cobalt Acetate, Co(C2H302)2.4H20 (for QuinAPSOs containing cobalt);
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide; and (g) Pr2NH: di-n-propylamine, (C3H7)2NH.
Pre~arative Procedures QuinAPSOs may be prepared by forming a starting reaction mixture by adding H3PO4 and one half of the quantity of water. To this mixture an aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture a silica (e.g., LUDOX-LS) is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed. A second mixture is prepared using manganese acetate (or a appropriate source of another element M) and one half of the remaining water. A third mixture is prepared using cobalt acetate (or a appropriate source of another element M) and one half of the remaining water. The three mixtures are admixed and the resulting mixture blended until a homogeneous mixture is obsle~v~.717 The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i . e., about 2 to 4 minutes. The pH of the mixture is measured and adjusted for temperature. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at an effective temperature for an effective time.
Digestions are typically carried out under autogenous pressure.
CoMnMqAPSO MOLECULAR SIEVES
The CoMnMgAPSO senary molecular sieves have three-dimensional microporous framework structures f C2 2, MnO2~2, Mgo2 2, A102, PO2 and SiO2 tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (CotMnuMgvAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~
present per mole of (CotMnuMgvAlxPySiz)02 and has a value of from zero (0) to about 0.3; "t", "u", and "v", "x", "y" and "z" represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "t", "u", "v", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CoMnMgAPSO
molecular sieves the values of "w", "x", "y" and "z" in lS the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y ~z + w) a 0.55 0.41 0.04 b 0.41 0.55 0.04 c 0.10 0.55 0.35 d 0.55 0.10 0.35 ~ CoMnMgAPS0 compositions are generally synthesized by hydrothermal~crystallization from a reaction mixture containing reactive sources of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, and preferably an organic templating agent, i.e., structure-directing, agent. The structure-directing agents are prçferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between lOO-C and 200-C, until crystals of the CoMnMgAPSO product are obtained, usually over a period of from several hours to several weeks. Typical crystallization times are from about 2 hours to about 30 days with from about 4 hours to about 20 days generally being employed to obtain CoMnMgAPSO products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CoMnMgAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (COtMnuMgvAlxpysiz)o2 2 ~73~ 1336717 wherein "R" is an organic templating agent; "a" is the amount of organic templating~agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to 5 about 6 and more preferably from greater than zero to about 2; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "t", "u", "v", "x", "y", and n Z 1~ represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and 10 silicon, respectively, and each has a value of at least 0.01.
In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z", where "w" is the sum of "t" + "u" + "v", are 15 generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.36 0.04 G 0.36 0.60 0.04 H 0.01 0060 0.39 - I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction 25 composition, the reactants are normalized with respect to the total of "t", "u", "v", "x", "y" and "z" such that (t + u + v + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, manganese, magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents CoMnMgAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare CoMnAPSO include:
(a) Alipro: aluminum isopropoxide;
~b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an agueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(c) H3PO4: aqueous solution which is 85 weight percent phosphoric acid;
(d) MnAc: Manganese acetate, Mn(C2H302)2-4H20;
(e) CoAc: Cobalt Acetate, Co(C2H302)2-4H20;
(f) MgAc: Magnesium Acetate Mg(C2H302)-4H20;
(g) TEAOH: 40 weight percent agueous solution of tetraethylammonium hydroxide; and (h) Pr2NH: di-n-propylamine, (C3H7)2NH.
Preparative Procedures CoMnMgAPSOs may be prepared by forming a starting reaction mixture by adding H3PO4 and one half of the quantity of water. To this mixture analuminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture a silica (e.g., LUDOX-LS) is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed.
Three additional mixtures are prepared using cobalt acetate, magnesium acetate and manganese acetate using one third of the remainder of the water for each mixture. The four mixtures are then admixed and the resulting mixture blended until a homogeneous mixture is observed. An organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature for a time.
Digestions are typically carried out under autogenous pressure.
SenAPSO MOLECULAR SIEVES
The SenAPSO molecular sieves have three-dimensional microporous framework structures of Mo2n, A102-, PO2+ and SiO2 tetrahedral oxide units, where "n" is -3, -2, -1, 0 or +1, and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MWAlxpysiz)o2 ~' .~
.76-wherein "R" represents at least one organic templating agent present in the intracrystalline~pore system; "m"
represents the molar amount of "R" present per mole of (MwAlxPySiz)02r and has a value of from zero to about 0.3; "M" represents three elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; "n" may have the aforementioned values depending upon the oxidation state of "M"; and "w", "x", "y" and "z" represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides.
The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows, wherein "w" denotes the combined mole fractions of the three elements "M" such that "w" = "wl" + "w2" + "w3'l and each element "M" has a mole fraction of at least 0.01:
Mole Fraction 20 Point x y (z + w) A 0.60 0.36 0,04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0c98 E 0.60 OoOl 0u39 _-77_ 1336717 In a preferred subclass of the SenAPSO
molecular sieves the values of "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point ` x y (z + w) a 0.60 0.36 0.04 -b 0.36 0.60 0.04 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 SenAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture lS containing reactive sources of elements "M", aluminum, phosphorus and silicon, and preferably an organic templating, i.e., structure-directing, agent. The structure-directing agents are preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50 C and 250-C, and preferably between lOO-C and 200-C, until crystals of the SenAPSO product are obtained, usually ~ 78-over a period of from several hours to several weeks.
Typical crystallization time~s are from about 2 hours to about 30 days with from about 4 hours to about 20 days generally being employed to obtain SenAPS0 products.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the SenAPSO compositions, it is preferred to~employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MwAlxPySiz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6 and more preferably from greater than zero to about 2; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y", and "z" represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01, with the proviso that each "M" is present in a mole fraction of at least 0.01.
In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z" are generally defined as being within the limiting compositional values or points as follows:
_79 1336717 Mole Fraction Point x ` y (z + w~
F 0.60 0.36 0.04 G 0.36 0.60 0.04 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x +
y + z) = 1.00 mole. The SenAPSO molecular sieves are prepared by preparative techniques, and using sources of the elements "M" similar to those described for the other APSO molecular sieves described above and below.
. AsAPSO MOLECULAR SIEVES
The AsAPSO molecular sieves of U.S. Serial No.
599,808, filed April 13, 1984, and U.S. Serial No.
845,484 filed March 31, 1986 have a framework structure of AsO2n, AlO2 , PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (AswAlxPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (AswAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than o.i5; and "w", "x", "y" and "z" represent the mole fractions of the elements arsenic, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the AsAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 - -81~ 67 17 In an especially preferred su~class of the AsAPSO molecular sieves, the~values of w, x, y and z are as follows:
- Mole Fraction 5 Point x ~ (z + w) g 0.50 0.40 0.10 h 0.42 0.48 0.10 i 0.38 0.48 0.14 j 0.38 0.37 0.25 k 0.45 0.30 0.25 1 0.50 0.30 0.20 AsAPS0 compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of arsenic, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the AsAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective .-82 ~ times of from 2 hours to about 30 days, generally from ~ about 12 hours to about 10 d~ays, have been observed.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the AsAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (AswAlxPySiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 60; and "w", "x", "y"
and "z" represent the mole fractions of arsenic, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x ~ y ~ (z + w) F 0.60 0.38 . 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especialiy preferred reaction mixtures are those containing from about 1 to about 2 total moles of silicon and arsenic, and from about 1 to about 2 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of-"w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing arsenic, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents AsAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare AsAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) As205, arsenic(V) oxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures AsAPSOs may be prepared by forming a starting reaction mixture by dissolving the arsenic(V) oxide and the H3PO4 in at least part of the water. To this ~, ",, ~, -8S- 1~36717 solution the aluminum isopropoxide or CATAPAL is added. This mixture is then blended until a homogeneous mixture is Observed. To this mixture the templating agent and then the silica is added and the resulting mixture blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoro-ethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
BAPSO MOLECULAR SIEVES
The BAPSO molecular sieves have a framework structure of BO2-, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
Mr : (BWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~'R"
present per mole of (BwAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements boron, aluminum, phosphorus and silicon, respectively, ~ -86- 1336717 present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 5 Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the BAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e - 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the BAPSO molecular sieves, the values of w, x, y and z are as follows:
- - - Mole Fraction Point x ~ y (z +-w) g 0.51 0.42 0.07 h 0.45 0.48 0.07 i 0.33 0.48 0.19 j 0.33 0.38 0.29 k 0.36 0.35 0.29 1 0.51 0.35 0.14 BAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of boron, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
20 and about 250-C, and preferably between about 100C and about 200-C until crystals of the BAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration. ~ -In synthesizing the BAPS0 compositions, it ispreferred to employ a reaction mixture composition S expressed in terms of the molar ratios as follows:
w x y z) 2 2 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "w", "x", "y"
and "zf' represent the mole fractions of boron, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embo~ nt the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
~ Mole Fraction Point x ~ y (z + w) - F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especialiy preferred reaction mixtures are those containing from about 1.0 to about 2 total moles of silicon and boron, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing boron, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation Z5 for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) H3BO3, boric acid, and trialkyl borates;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures BAPSOs may be prepared by forming a starting reaction mixture by dissolving aluminum isopropoxide in an alcohol such as isopropanol, adding the H3PO4 and 9l 1336717 recovering the solid which precipitates. This solid is then added to water, and trialkylborate (for example trimethyi borate added, followed by silica and the templating agent. This mixture is then blended until a homogeneous mixture is observed.
The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
BeAPSO MOLECULAR SIEVES
The BeAPSO molecular sieves of U.S. Patent No. 4,737,353 have a framework structure of BeO2~2, AlO2-,AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (BewAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BewAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements beryllium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting~compos~itional values or points as~follows:
Mole Fraction 5 Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the BeAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction 15 Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 BeAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of beryllium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably -93_ 1336717 a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vesse}, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the BeAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed, with from 1 to 10 days being preferred. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BeAPSO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (BewAlxpysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most -94~ 133 6~17 preferably not greater than about 20; and "w", "x", "y"
and "z" represent the mole fractions of ~eryllium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 10 Point x y ~z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing beryllium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BeAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BeAPSOs include:
(a) Alipro: aluminum isopropoxi~;3 6 71 7 (b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) beryllium sulfate, BeSO4;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) Mquin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEBA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures ¦ 3 3 6 717 BeAPsos may be prepared by forming a starting solution by mixing H3PO4 in at least part of-the water. To this solution is added beryllium sulfate (or another beryllium salt) and the resultant mixture stirred until a homogeneous solution is obtained. To this solution may be added successively the aluminum oxidel the silica and the templatingagent, with the mixture being stirred between each addition until it is homogeneous. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
CAPSO MOLECULAR SIEVES
The CAPSO molecular sieves of and U.S.
Patent No. 4,738,837 have a framework structure of CrO2n, A102-, PO2-, PO2+ and SiO2 tetrahedral units (where "n" is -1, 0 or +1) having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (crwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
. .
~ represents the molar amount of "R" present per-mole of ~ (CrwAlxPySiz)02 and has a value of zero to ab~ut 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements S chromium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y rz + w~
A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction 20 Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the CAPS0 molecular sieves, the values of x and y in the above formula are each within the range of about 0.4 to 0.5 and (z + w) is in the range of about 0.02 to 0.15.
Since the exact nature of the CAPSO molecular sieves is not clearly understood at present, although all are believed to contain CrO2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the CAPS0 molec~lar sieves by means of their chemical composition.
This is due to the low level of chromium present in certain of the CAPSO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between chromium, aluminum, phosphorus and silicon. As a result, although it is believed that CrO2 tetrahedra are substituted isomorphously for A102, PO2 or SiO2 tetrahedra, it is appropriate to characterize certain CAPSO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
CAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of chromium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic ` _99_ 1 3 3 6717 Table, and/or optionally an alkali or other metal. The reaction mixture is generalLy placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the CAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CrwAlxPysiz )2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "w", "x", "y"
-loo- 1336717 and "z" represent the mole fractions of chromium, aluminum, phosphorus and silïcon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w~
F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.3 to about 0.5 total moles of silicon and chromium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", -y" and "z" such that (w + x + y + z) = l.00 mole. Molecular sieves containing chromium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
PreParative Reagents 13 3 6 717 CAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare MnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4: 85 weight percent aqueous phosphoric acid;
(e) chromium acetate, and chromium acetate hydroxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
,, ~
(n) TPAOH: tetrapropylammonium hydroxide; and ~ (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures CAPSOs may be prepared by forming a starting solution by dissolving H3PO4 in at least part of the water. To this solution the aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the silica, the chromium acetate or chromium acetate hydroxide and the templating agent are successively added and at each step the resulting mixture is blended until a homogeneous mixture is observed.
Alternatively, the water and aluminum isopropoxide may first be mixed, and then the silica, the chromium acetate or chromium acetate hydroxide, the phosphoric acid and the templating agent added, and again at each step the resulting mixture is blended until a homogeneous mixture is observed.
In either case, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C or 200-C) for a time or placed in lined screw top bottles for digestion at 100-C. Digestions are typically carried out under autogenous pressure.
-103- 1 3~6717 GaAPSO MOLECULAR SIEVES
The GaAPSO molecular sieves of U.S. Patent No. 4,735,806 have a framework structure of GaO2-, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (GaWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (GawAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.2; and "w", "x", "y" and "z" represent the mole fractions of the elements gallium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 ..~. -, - In-a preferred subclass of the GaAPS0 molecular sieves, the values of w, x, y and z are a~
follows:
Mole Fraction `5 Point x y (z.+ w~
a 0.60 0.38 0.02 b 0.38 0.60 0.02 -c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the GaAPSO molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) g 0.45 0.40 0.15 h 0.33 0.52 0.15 i 0.20 0.52 0.28 j 0.20 0.45 0.35 k 0.36 0 29 0.35 1 0.45 0.29 0.26 GaAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of gallium, silicon, aluminum and phosphorus, preferably an organic templating, i~.e., structure-directing, agent, preferably a compound of an element of 6roup VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the GaAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 2 to about 15 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GaAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GaWAlxPysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about 500, ~-14643 preferably between about 2 and about 300, most preferably not greater than ~about 20; and "w", "x"-, "y"
and "z" represent the mole fractions of gallium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y ~z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.5 to about 1.0 total moles of silicon and gallium, and from about 0.75 about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing gallium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents GaAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GaAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUOOX-lS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3P04 : 85 weight percent aqueous phosphoric acid;
(e) gallium hydroxide, or gallium sulfate;
(f) TFAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
. ~3 .
~ (m~~ TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrap~ropyl~ammonium hydroxide-; and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
~ Preparative Procedures GaAPSOs may be prepared by forming a starting solution by dissolving the H3PO4 in at least part of the water. To this solution the aluminum hydroxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. -To this mixture is added a second solution prepared by adding silica to a solution containing the gallium hydroxide and the templating agent and then the combined mixture is blended until a homogeneous mixture is observed.
Alternatively, the templating agent may be added to the solution containing the phosphoric acid and water, and a solution of gallium sulfate in water added, followed by successive additions of silica and aluminum oxide and then the combined mixture is blended until a homogeneous mixture is observed.
In either case, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200-C) for a time or placed in lined screw top bottles lOg- 1336717 for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GeAPSO MOLECULAR SIEVES
The GeAPSO molecular sieves have a framework structure of GeO2, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (GewAlxpysiz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~
present per mole of (GewAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements germanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- ` 1336717 - - ~ -- - Mole Fraction Point _ ~ y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 - 0.01 0.98 E 0.60 0.01 0.39 . In.a preferred subclass of the GeAPSO
molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y ~z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 . In an especially preferred subclass of the GeAPSO molecular sieves, the values of w, x, y~and z are as follows:
- -- - Mole Fraction Point x ~ y (z + w) g 0.60 0.35 0.05 h 0.47 0.48 0.05 i 0.40 0.48 0.12 j 0.40 0.36 0.24 k 0.46 0.30 0.24 1 0.60 0.30 0.10 GeAPS0 compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of germanium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250C, and preferably between about lOO-C and about 200-C until crystals of the GeAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from 2s about 4 hours to about 20 days, and preferably about 12 hours to about 7 days have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GeAPSO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GewAlxPysiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20, and desirably not greater than about 10; and "w", "x", "y" and "z"
represent the mole fractions of germanium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point _ y (z + w) . F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.2 to about 0.3 total moles of silicon and germanium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing germanium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents GeAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GeAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the-trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) germanium tetrachloride or germanium ethoxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQquin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEBA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate;
(q) aluminum chlorhydrol.
'?
..~ ~, .
Preparative Procedures In some cases, it may ba advantageous, when syntheslzing the GeAPSO compositions, to flrst combine sources of germanium and aluminum, or of germanium, aluminum and silicon, to form a mixed germanium/aluminum or germanium/aluminum/silicon compound (this compound being typically a mixed oxide) and thereafter to combine this mixed compound with a source of phosphorus to form the final GeAPSO composition. Such mixed oxides may be prepared for example by hydrolyzing aqueous solutions containing germanium tetrachloride and aluminum chlorhydrol, or germanium ethoxide, tetraethylorthosilicate, and aluminum tri-sec-butoxide.
GeAPSOs may be prepared by forming a starting solution by dissolving the H3PO4 in at least part of the water. To this solution the aluminum isopropoxide or CATAPAL is added. This mixture is then blended until a - homogeneous mixture is observed. To this mixture the templating agent and then a solution containing tetraethylorthosilicate and germanium ethoxide, and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, the phosphoric acid may first be mixed with the templating agent, and then a solution containing tetraethylorthosilicate and germanium ethoxide combined with the phosphoric acid/templating agent solution. Then the aluminum' oxide is added and the resultant mixture blended until homogeneous.
In a third procedure, the phosphorlc acid may first be mixed with the templating agent and water, and to the resultant solution is added the solid aluminum/silicon/germanium mixed oxide prepared as described above. The resultant mixture is then blended until homogeneous.
Whichever procedure is adopted, the final mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
LiAPSO MOLECULAR SIEVES
The LiAPSO molecular sieves have a framework structure of Lio2-3, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (LiWAlxpysiz)o2 wherein ~'R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of ~R~' present per mole of .~, .
:-117-- 133~717 (LiwAlxPySiz)02 and has a value of-zero to about 0.3, but is preferably not greater than O.15; and "w", "x", ''y" and "z" represent the mole fractions of the elements lithium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0098 E 0.60 0.01 0.39 In a preferred subclass of the LiAPSo molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0~38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f . 0.60 0.01 0.39 - In an especially preferred subclass of the LiAPSo molecular sieves, the value of WTZ is not greater than about 0.20.
Since the exact nature of the LiAPSo molecular S sieves is not clearly understood at present, although -all are believed to contain Lio2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the LiAPSo molecular sieves by means of their chemical composition.
This is due to the low level of lithium present in certain of the LiAPo molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between lithium, aluminum, phosphorus and silicon. As a result, although it is believed that Lio2 tetrahedra are substituted isomorphously for AlO2, PO2 or SiO2 tetrahedra, it is appropriate to characterize certain LiAPS0 compositions by reference to their chemical composition in terms of the mole ratios of oxides.
LiAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of lithium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The ~119-- -reaction mixture is generally placed in-a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250C, and preferably between about lOO-C and about 200-C until crystals of the LiAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the LiAPSo compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (LiwAlxPySiz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20, and most desirably not greater than about 10; and "w", "x", "y" and "z"
~-120- 1336717 represent the mole fractions of lithium,-aluminum, phosphorus and silicon, respectively, and each has a value of at-least 0.01.
In one embodiment the reaction mixture is S selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = l.00 mole. Molecular sieves containing lithium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Rea~ents LiAPSo compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare LiAPSos include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4: 85 weight percent aqueous phosphoric acidi (e) lithium orthophosphate;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide; and (o) DEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.' Preparative Procedures LiAPSOs may be prepared by forming a starting ~, , reaction mixture mixing lithium phosphate and aluminum oxide, then adding the resultant mixture to the H3P04. To the resultant mixture is added silica and the templating agent and the resulting mixture is blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
AlPO4 ALUMINOPHOSPHATE MOLECULAR SIEVES
The AlPO4 aluminophosphate molecular sieves of U.S. Patent No. 4,310,440 are disclosed as microporous crystalline aluminophosphates having an essential crystal line framework structure whose chemical composition, expressed in terms of molar ratios of oxides, is:
A12O3: 0-8-1-2 P205-The pores of the framework structure are uniform and in each species have nominal diameters of from 3 to 10 Angstroms; the aluminophosphates have an intracrystalline adsorption capacity for water at 4.6 Torr and 24C of at least 3.5 weight percent, the adsorption of water being completely reversible while -123- 13~ 6717 retaining the same essential framework topology in both the hydrated and dehydrated~state. By the ter~
"essential framework topology" is meant the spatial arrangement of the primary Al-O and P-O bond linkages.
S No change in the framework topology indicates that there is no disruption of these primary bond linkages.
The aluminophosphates are prepared by hydrothermal crystallization of a reaction mixture prepared by combining a reactive source of phosphate, alumina and water and at least one structure-directing or templating agent which can include an organic amine and a quaternary ammonium salt. In the as-synthesized form, the structure-directing agent is contained within the framework structure of the aluminophosphate in amounts which vary from species to species but usually do not exceed one mole per mole of A1203 thereof. This structure-directing agent is readily removed by water washing or calcination and does not appear to be an essential constituent of the aluminophosphate, as evidenced by essentially complete absence of ion-exchangeability of the as-synthesized compositions and also the complete absence of any internally-contained organic molecules in the as-synthesized form of at least one species of the generic class. Evidence that structure-directing agent is a critical constituent is contained in certain of the Examples of the Patent - . ~
-124- ~
- 4,310,440, wherein reaction mixtures,~-otherwise identical to those which yield the AlPO4 products except for the presence of templating agents, yield instead the previously known aluminophosphate phases AlPO4.I.I-1.3 H2O, AlPO4-tridymite, AlPO4-quartz and AlPO4-cristobalite.
The AlPO4 aluminophosphates are prepared by forming a reaction mixture which contains, in terms of molar ratios of oxides:
A12O3 : 0.5-1.5 P2O5 :7-100 H2O
and contains from about 0.2 to 2.0 moles of templating agent per mole of A12O3. The reaction mixture is placed in a reaction vessel inert toward the reaction system and heated at a-temperature of at least about 100-C, preferably between 100-C and 300-C, until crystallized, usually a period from 2 hours to 2 weeks. The-solid crystalline reaction product is then recovered by any convenient method, such as filtration or centrifugation, washed with water and dried at a temperature between ambient and llO-C, preferably in air.
MeAPO MOLECULAR SIEVES
MeAPO molecular sieves are crystalline microporous aluminophosphates in which the substituent metal is one of a mixture of two or more divalent metals of the group magnesium, manganese, zinc and cobalt and are disclosed in U.S. Patent No. 4,567,029. ~embers of -125- - 133671~
- this novel class of compositions have-a thre-e-dimensional microporous crystal framewor~ st.~cture of M02 2, A10 2 and PO 2 tetrahedral units and have an essential empirical chemical composition, on an anhydrous basis, of:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (MXAlyPz)02 and has a value of from zero to 0.3, the maximum value in each case depending upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular metal aluminophosphate involved; "x", "y", and "z" represent the mole fractions of the metal "M", (i.e., magnesium, manganese, zinc and cobalt), aluminum and phosphorus, respectively, present as tetrahedral oxides, said mole fractions being such that they are representing the following values for "x", "y", and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.35 0.05 0.60 D 0O35 0060 0.05 -126- 13367 1~
When synthesized the minimum value of "m" in-the formula above is 0.02. In a preferrèd subclass of the metal aluminophosphates of this invention, the values of "x", "y" and "z" in the formula above are representing the following values for "x", "y" and -z":
Mole Fraction Point x Y z a 0.01 0.52 0.47 b 0.01 0.39 0.60 c 0.25 0.15 0.60 d 0.25 0.40 0.35 The as-synthesized compositions are capable of withstanding 350-C calcination in air for extended periods, i.e., at least 2 hours, without becoming amorphous. While it is believed that the M, Al and P
framework constituents are present in tetrahedral coordination with oxyqen, it is theoretically possible that some minor fraction of these framework constituents are present in coordination with five or six oxygen atoms. It is not, moreover, necessarily the case that all of the M, Al and/or P content of any given synthesized product is a part of the framework in the aforesaid types of coordination with oxygen. Some of each constituent may be merely occluded or in some as yet undetermined form and may or may not be structurally significant.
~ Since the term "metal aluminophosphate" is somewhat cumbersome, particularly in view of the need for numerous repetitions thereof in describing such compositions, the "short-hand" reference "MeAPO" is S employed hereinafter. Also in those cases where the metal "Me" in the composition is magnesium, the acronym MAPO is applied to the composition. Similarly, ZAPO, MnAPO, and CoAPO are applied to the compositions which contain zinc, manganese and cobalt, respectively. To identify the various structural species which make up each of the subgeneric classes MAPO, ZAPO, CoAPO and MnAPO, each species is assigned a number and is identified, for example, as ZAPO-5, MAPO-ll, CoAPO-ll and so forth.
The term "essential empirical chemical composition" is meant to include the crystal framework and can include any organic templating agent present in the pore system, but does not include al~ali metal or other ions which can be present by virtue of being contained in the reaction mixture or as a result of post-synthesis ion-exchange. Such ionic species, when present, function primarily as charge-balancing ions for A102 and/or M02 2 tetrahedra not associated with P02+
tetrahedra or an organic ion derived from the organic templating agent.
~-128- 1336717 - The metal aluminophosphates ("MeAPOs"~ are - synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the metal "M", alumina and phosphate, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenouspressure at a temperature between 100C and 225C, and preferably between 100C and 200-C, until crystals of the metal aluminophosphate product are obtained, usually a period of from 4 hours to 2 weeks. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MeAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of molar ratios as follows:
aR : (MXAlyPz)O2 : b~2O
wherein "R" is an organic templating agent; "a" has a value great enough to constitute an effective concentration of "R" and is within the rànge of >0 to 6;
"b" has a value of from zero to 500, preferably 2 to 30 "M" represents a metal of the group zinc, magnesium, manganese and cobalt, "x", "y" and "z" represent the `129- 133-6717 ~ mole fractions, respectively, of "M", aluminum and - phosphorus in the (MXAlyPz)02 constituent, and each has a value of at least 0.01, the said points E, F, G, H, I, and J representing the following values for "x", "y" and nzn Mole Fraction Point x y z E 0.01 0.70 0.29 F 0.01 0.29 0.70 G 0.29 0.01 0.70 H 0.40 0.01 0.59 I 0.40 0.59 0.01 J 0.29 0.70 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (M + Al + P) = (x + y + z) = 1.00 mole.
In forming the reaction mixture from which the metal aluminophosphates are crystallized the organic templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates and microporous aluminophosphates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably N or P and most preferably N, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred nitrogen-containing compounds for use as templating agents are the amines and quaternary ammonium compounds, the latter being represènted generally by the formula R4N wherein each R is an alkyl or aryl group containing from 1 to 8 carbon atoms.
Polymeric quaternary ammonium salts such as ~(C14H32N2)(0H)2]x wherein "x" has a value of at least 2 are also suitably employed. Both mono-, di- and triamines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired metal aluminophosphates or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions:
di-n-propylamine; tripropylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N-N-dimethylethanolamine; choline;
N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine; N-methylethanolamine;
N-methylpiperidine; 3-methylpiperidine;
.
- N-methylcyclohexylamine; 3-methylpyridine: - ~
~ 4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine, neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every species of metal aluminophosphate (MeAPO), i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several MeAPO compositions, and a given MeAPO composition can be produced using several different templating agents.
The preferred phosphorus source is phosphoric acid, but organic phosphates such as triethylphosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlPO4 composition of U.S. Patent No. 4,310,440.
Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide do not, apparently serve as reactive sources of phosphorus, but these compounds do function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum al~oxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of ~ --- phosphorus are, of course, a~lso suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
The metals zinc, cobalt, magnesium and manganese can be introduced into the reaction system in any form which permits the formation in situ of reactive divalent ions of the respective metals. Advantageously salts, oxides or hydroxides of the metals are employed such as cobalt chloride hexahydrate, alpha cobaltous iodide, cobaltous sulfate, cobalt acetate, cobaltous bromide, cobaltous chloride, zinc acetate, zinc bromide, zinc formate, zinc iodide, zinc sulfate heptahydrate, magnesium acetate, magnesium bromide, magnesium chloride, magnesium iodide, magnesium nitrate, magnesium sulfate, manganous acetate, manganous bromide, manganous sulfate, and the like.
While not essential to the synthesis of MeAPO
compositions, it has been found that in general, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the MeAPO species to be produced or a topologically similar aluminophosphate or aluminosilicate composition, facilitates the ~- - -- crystallization procedure.
After crystallization the MeAP0 product is isolated and advantageously washed with water and dried in air. The as-synthesized MeAP0 contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular MeAP0 species. As a general rule, the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the MeAP0 product and must be removed by calcining the MeAP0 at temperatures of 200-C to 700-C to thermally degrade the organic species. In a few instances the pores of the MeAP0 product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein does not include the condition of the MeAPO phase wherein the organic moiety occupying the intracrystalline pore system as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (MxAlyPz)O2 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an aluminum alkoxide is employed as the source of aluminum, the corresponding alcohol is necec-~Arily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the synthesis process as a templating agent. For the lS purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized MeAPO
material.
Since the MeAPO compositions are formed from AlO2, PO2, and MO2 tetrahedral units which, respectively, have a net charge of -1, +1, and -2, the matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between AlO2 tetrahedra and charge-balancing cations. In the MeAPO compositions, an A102- tetrahedron can be balanced electrica~ e7r by association with a P02+ tetrahedron or a simple cation, such as an alkali metal cation, a cation of the metal ~M~ present in the reaction mixture, or an organic cation derived from the templating agent.
Similarly an M02-2 tetrahedron can be balanced electrically by association with PO2+ tetrahedra, a cation of the metal "M", organic cations derived from the templating agent, or other divalent or polyvalent metal cations introduced from an extraneous source. It has also been postulated that non-adjacent A102- and PO2+ tetrahedral pairs can be balanced by Na+ and OH-, respectively [Flanigen and Grose, Molecular Sieve Zeolites-I, ACS, Washington, D.C. (1971)].
FAPO MOLECULAR SIEVES
Ferroaluminophosphates are disclosed in U.S.
Patent No. 4,554,143, and have a three-dimensional microporous crystal framework structure of FeO2n, A102-and P02+ tetrahedral units and have an essential empirical chemical composition, on an anhydrous basis, of:
mR : (Fe~Alypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystal line pore system; "m"
represents the moles of "R" present per mole of (Fe~AlyPz)02 and has a value of from zero to 0.3, the D-i4643 i maximum value in each case depending upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular ferroaluminophosphate involved; "x", "y", and "z"
represent the mole fractions of iron, aluminum and phosphorus, respectively, present as tetrahedral oxides, representing the following values for "x", "y", and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.35 0.05 0.60 D 0.35 0.60 0.05 When synthesized the minimum value of "m" in the formula above is 0.02. In.a preferred subclass of the ferroaluminophosphates the values of "x", "y" and "z" in the formula above are representing the following values for "x", nyn and "z":
Mole Fraction 20 Point x y Z
a 0.01 - 0.52 0.47 b 0.01 0.39 0.60 c 0.25 0.15 0.60 d 0.25 0.40 0.35 The iron of the FeO2 structural units can be in either the ferric or ferrous valence state, depending largely upon the source of the iron in the synthesis gel. Thus, an FeO2 tetrahedron in the structure can have a net charge of either -1 or -2. While it is believed that the Fe, Al and P framework constituents are present in tetrahedral coordination with oxygen (and are referred to herein as such), it is theoretically possible that some minor fraction of these framework constituents are present in coordination with five or six oxygen atoms. It is not, moreover, necessarily the case that all of the Fe, Al and/or P content of any given synthesized product is a part of the framework in the aforesaid types of coordination with oxygen. Some of each constituent may be merely occluded or in some as yet undetermined form, and may or may not be structurally significant.
For convenience in describing the ferroaluminophosphates, the "short-hand" acronym "FAPO"
is sometimes employed hereinafter. To identify the various structural species which make up the generic class FAPO, each species is assigned a number and is identified, for example, as FAPO-11, FAPO-31 and so forth.
The term "essential empirical chemical composition" is meant to include the crystal framework and can include any organic templating agent present in the pore system, but does not include alkali metal or other ions which can be present by virtue of being contained in the~reaction ~ixture or as a result of post-synthesis ion-exchange. Such ionic species, when present, function primarily as charge-balancing ions for FeO2 and/or AlO2 2 tetrahedra, FeO2 2 tetrahedra associated with PO2+ tetrahedra or not associated with PO2 tetrahedra or an organic ion derived from the organic templating agent.
The af oresaid ferroaluminophosphates are synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of iron oxide, alumina and phosphate, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenous pressure at a temperature of at least lOO-C, and preferably between lOO-C and 250-C, until crystals of the ~etal aluminophosphate product are obtained, usually a period of from 2 hours to 2 weeks. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the FAP0 compositions, it is _139_ 1 3 3 6 7 17 preferred to employ a reaction mixture composition expressed in terms of molar ratios as follows:
aR : (FexAlyPz)02 : bH2O
wherein "R" is an organic templating agent; "a" has a value great enough to constitute an effective concentration of "R" and is within the range of >0 to 6;
"b" has a value of from zero to 500, preferably 2 to 80;
"x", "y" and "z" represent the mole fractions, respectively, of iron, aluminum and phosphorus in the (FexAlyPz)O2 constituent, and each has a value of at least 0.01, and representing the following values for "x", "y" and -z":
Mole Fraction Point x y z E 0.01 0.70 0.29 F 0.01 0.29 0.70 G 0.29 0.01 0.70 H 0.40 0.01 0.59 I 0.40 0.59 0.01 J 0.29 0.70 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (Fe + Al + P) = (x + y + z) - 1.00 mole.
In forming the reaction mixture from which the ferroaluminophosphates are crystallized, the organic templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates and microporous aluminophosphates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably N or P and most preferably N, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred nitrogen-containing compounds for use as templating agents are the amines and quaternary ammonium compounds, the latter being represented generally by the formula R4N wherein each R is an alkyl or aryl group containing from 1 to 8 carbon atoms.
Polymeric quaternary ammonium salts such as [(C14H32N2)(OH)2]X wherein "x" has a value of at least 2 are also suitably employed. Mono-, di- and triamines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired metal aluminophosphates or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions;
di-n-propylamine; tri-n-propylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N-N-dimethylethanolamine; choline;
N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine; N-methylethanolamine;
N-methylpiperidine; 3-methylpiperidine;
N-methylcyclohexylamine; 3-methylpyridine;
4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine; neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every species of ferroaluminophosphate (FAPO), i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several FAPO
compositions, and a given FAPO composition can be produced using several different templating agents.
The phosphorus source is preferably phosphoric acid, but organic phosphates such as triethylphosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlP04 composition of U.S. Patent No. 4,310,440.
Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide do not, apparently serve as reactive - - ` 1336717 sources of phosphorus, but these compounds do function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum alkoxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
Iron can be introduced into the reaction system in any form which permits the formation in situ of reactive ferrous or ferric ions. Advantageously iron salts, oxides or hydroxides are employed such as iron sulfate, iron acetate, iron nitrate, or the like.
Other sources such as a freshly precipitated iron oxide r-Fe~OH, are also suitable.
While not essential to the synthesis of FAPO
compositions, it has been found that in general, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the FAPO species to be produced or a topologically similar aluminophosphate or -aluminosllicate composition, facilitates the crystallization procedure.
After crystallization the FAPO product is isolated and advantageously washed with water and dried in air. The as-synthesized FAPO contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular FAPO species.
As a general rule, the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the FAPO product and must be removed by calcining the FAPO at temperatures of 200C
to 700 C to thermally degrade the organic species. In a few instances the pores of the FAPO product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein and in the claims does not include the condition of the FAP0 phase wherein the organic moiety occupying the intracrystalline pore system`as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (FexAlyPz)O2 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an aluminum alkoxide is employed as the source of aluminum, the corresponding alcohol is necessarily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the syntheses process as a templating agent. For the purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized FAPO
material.
Since the FAPO compositions are formed from AlO2 , PO2 , FeO2 and/or FeO2 2 units the matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between A102 tetrahedra and charge-balancing cations. In the FAPO compositions, an A102 tetrahedron can be balanced electrically either by association with a PO2 tetrahedron or a Simple cation such as an kali metal cation, a Fe+2 or Fe+3 cation present in the reaction mixture, or an organic cation derived from the templating agent. Similarly an Fe02~ or FeO2~2 tetrahedron can be balanced electrically by association with PO2+ tetrahedron, a Fe+2 or Fe+3 cation, organic cations derived from the templating agent, or other metal cat ion introduced from an extraneous source. It has also been postulated that non-adjacent A102- and P02+ tetrahedral pairs can be balanced by Na+ and OH-, respectively [Flanigen and Grose, Molecular 5ieve Zeolites-I, ACS, Washington, D.C. (1971)).
TAPO MOLECULAR SIEVES
TAPO molecular sieves are disclosed in U.S. IS
Patent No. 4,500,561, and comprise a three-dimensional microporous crystal framework structure of TiO2, A102-and P02+ tetrahedral units which has a unit empirical formula on an anhydrous basis of:
mR: (TixAlypz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (TiXAlyPz)02 and has a value of between zero and about 5.0, the maximum value in each case depending upon the molecular dimensions of the templating agent and the B~
available void volume of~pore system of the particular titanium molecular sieve; 'ix", "y" and "z" represent the mole fractions of titanium, aluminum and phosphorus, respectively, present as tetrahedral oxides, representing the following values for "x", "y" and "z":
. Mole Fraction Point x y z A 0.001 0.45 0.549 B 0.88 0.01 0.11 C 0.98 0.01 0.01 D 0.29 0.70 0.01 E 0.001 0.70 0.299 The parameters "x", "y" and "z" are preferably within the following values for "x", "y" and "z":
. Mole Fraction Point x y z a 0.002 0.499 0.499 b 0.20 0.40 0.40 c 0.20 0.50 0.30 d 0.10 0.60 0.30 e 0.002 0.60 0.398 The titanium-containing molecular sieves are referred to hereinafter, solely for point of reference herein as "TAPO" molecular sieves, or as "TAPOs" if the reference is to the class as a whole. This designation is simply made for the sake of convenient reference herein and is not meant to designate a particular structure for any given TAPO molecular sieve. The members of the class of TAPO's employed hereinafter in the examples will be characterized simply by referring S to such members as TAPO-5, TAPO-ll, etc, i.e., a particular species will be referred to as TAPO-n where "n" is a number specific to a given class member as its preparation is reported herein. This designation is an arbitrary one and is not intended to denote structural relationship to another material(s) which may also be characterized by a numbering system.
The term "unit empirical formula" is used herein according to its common meaning to designate the simplest formula which gives the relative number of lS moles of titanium, aluminum and phosphorus which form the ~Tio2], tPO2] and ~AlO2] tetrahedral unit within a titanium-containing molecular sieve and which forms the molecular framework of the TAPO composition(s). The unit empirical formula is given in terms of titanium, - 20 aluminum and phosphorus as shown in Formula (1), above, and does not include other compounds, cations or anions which may be present as a result of the preparation or the existence of other impurities or materials in the bulk composition not containing the aforementioned tetrahedral unit. The amount of template R is reported as part of the composition when the as-synthesized unit empirical formula is given, and water may also be reported unless such is defined as the anhydrous form.
For convenience, coefficient "m" for template "R" is reported as a value that is normalized by dividing the number of moles of organic templating agent ~y the total moles of titanium, aluminum and phosphorus.
The unit empirical formula for a TAPO may be given on an "as-synthesized" basis or may be given after an "as-synthesized" TAPO composition has been subjected to some post treatment process, e.g., calcination. The term "as-synthesized" herein shall be used to refer to the TAPO composition(s) formed as a result of the hydrothermal crystallization but before the TAPO
composition has been subjected to post treatment to remove any volatile components present therein. The actual value of "m" for a post-treated TAPO will depend on several factors (including: the particular TAPO, template, severity of the post-treatment in terms of its ability to remove the template from the TAPO, the proposed application of the TAPO composition, and etc.) and the value for "m" can be within the range of values as defined for the as-synthesized TAP0 compositions although such is generally less than the as-synthesized TAPO unless such post-treatment process adds template to the TAPO so treated. A TAP0 composition which is in the calcined or other post-treatment form generally has an -149- ~ 1336717 ~ empirical formula represented by Formula~(l), except that the value of "m" is genèrally less than about 0.02t.
Under sufficiently severe post-treatment conditions, e.g., roasting in air at high temperature for long periods (over 1 hr.), the value of "m" may be zero (0) or, in any event, the template, R, is undetectable by normal analytical procedures.
The TAPO molecular sieves are generally further characterized by an intracrystalline adsorption capacity for water at 4.6 torr and about 24C of about 3.0 weight percent. The adsorption of water has been - observed to be completely reversible while retaining the same essential framework topology in both the hydrated and dehydrated state. The term "essential framework topology" is meant to designate the spatial arrangement of the primary bond linkages. A lack of change in the framework topology indicates that there is no disruption of these primary bond linkages.
The TAPO molecular sieves are generally synthesized by hydrothermal crystallization from a reaction mixture comprising reactive sources of titanium, aluminum and phosphorus, and one or more organic templating agents. Optionally, alkali metal(s) may be present in the reaction mixture. The reaction mixture is placed in a pressure vessel, preferably lined with an inert plastic material, such as polytetra-` 1336717 fluoroethylene, and heated, preferably under autogenous ~ pressure, at a temperature of at least about 1007C, and preferably between lOO'C and 250C, until crystals of the molecular sieve product are obtained, usually for a period of from 2 hours to 2 weeks. While not essential to the synthesis of the TAPO molecular sieves, it has been found that in general stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the TAPO
to be produced, or a topologically similar composition, facilitates the crystallization procedure. The product is recovered by any convenient method such as centrifugation or filtration.
After crystallization the TAPO(s) may be isolated and washed with water and dried in airO As a result of the hydrothermal crystallization, the as-synthesized TAPO contains within its intracrystalline pore system at least one form of the template employed in its formation. Generally, the template is a molecular species, but it is possible, steric considerations permitting, that at least some of the template is present as a charge-balancing cation.
Generally the template is too large to move freely through the intracrystalline pore system of the formed TAP0 and may be removed by a post-treatment process, such as by calcining the TAPO at temperatures of between ` 1336717 about 200~C and to about 700C so as to thermally degrade the template or by employing some other post-treatment process for removal of at least part of the template from the TAPO. In some instances the pores of the TAPO are sufficiently large to permit transport of the template, and, accordingly, complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites.
The TAPOs are preferably formed from a reaction mixture having a mole fraction of alkali metal cation which is sufficiently low that it does not interfere with the formation of the TAPO composition.
The TAPO compositions are generally formed from a reaction mixture containing reactive sources of TiO2, A12O3, and P2O5 and an organic templating agent, said reaction mixture comprising a composition expressed in terms of molar oxide ratios of:
fR2O : (TixAlyPz)O2 : g H2O
wherein "R" is an organic templating agent; "f" has a value large enough to constitute an effective amount of "R", said effective amount being that amount which form said TAPO compositions; "g" has a value of from zero to 500; "x", "y" and "z" represent the mole fractions, respectively of titanium, aluminum and phosphorus in the (TiXAlyPz)02 constituent, and each has a value of at least 0.001 and being within the following values for "x", "y" and "z":
Mole Fraction Point x y z h 0.001 0.989 0.01 i 0.001 0.01 0.989 j 0.32 0.24 0.44 k 0.98 0.01 0.01 Although the TAP0 compositions will form if higher concentrations of alkali metal cation are present, such reaction mixtures are not generally preferred. A reaction mixture, expressed in terms of molar oxide ratios, comprising the following bulk composition is preferred:
oR2 WM2 (TixAlyPz)2 nH2 wherein "R" is an organic template; "o" has a value great enough to constitute an effective concentration of "R" and is preferably within the range of from greater than zero (0) to about S.0; "M" is an alkali metal cation; "w" has a value of from zero to 2.5; "n" has a value between about zero (0) and about 500; "x", "y" and "z" represent the mole fractions, respectively, of titanium, aluminum and phosphorus in the (TiXAlyPz)02 constituent, and each has a value of at least 0.001 and being within the following values for "x", '~y" and "z":
Mole Fraction Point x y z h 0.001 0.989 0.01 i 0.001 0.01 0.989 S j 0.32 0.24 0.44 k - 0.98 0.01 0.01 When the TAPOs are synthesized by this method the value of "m" in Formula (1) is generally above about 0.02.
Though the presence of alkali metal cations is not preferred, when they are present in the reaction mixture it is preferred to first admix at least a portion (e.g., at least about 10 weight percent) of each of the aluminum and phosphorus sources in the substantial absence (e.g., preferably less than about 20 percent of the total weight of the aluminum source and phosphorus source) of the titanium source. This procedure avoids adding the phosphorus source to a basic reaction mixture containing the titanium source and aluminum source, (as was done in most of the published attempts to substitute isomorphously [PO2] tetrahedra for ~SiO2] tetrahedra in zeolitic structures). Although the reaction mechanism is by no means clear at this time, the function of the template may be to favor the incorporation of [PO2] and ~Al02] tetrahedra in the framework structures of the crystalline products with .
~Tio2] tetrahedra isomorphously replacing ~PO2]
tetrahedra.
The reaction mixture from which these TAPOs are formed contains one or more organic templating agents (templates) which can be most any of those heretofore proposed for use in the synthesis of aluminosilicates and aluminophosphates. The template preferably contains at least one element of Group VA of the Periodic Table, particularly nitrogen, phosphorus, arsenic and/or antimony, more preferably nitrogen or phosphorus and most preferably nitrogen and is desirably of the formula R4X wherein X is selected from the group consisting of nitrogen, phosphorus, arsenic and/or antimony and R may be hydrogen, alkyl, aryl, aralkyl, or alkylaryl group and is preferably aryl or alkyl containing between 1 and 8 carbon atoms, although more than eight carbon atoms may be present in the group "R"
of the template. Nitrogen-containing templates are preferred, including amines and quaternary ammonium compounds, the latter being represented generally by the formula R'4N wherein each R' is an alkyl, aryl, alkylaryl, or aralkyl group; wherein R' preferably contains from l to 8 carbon atoms or higher when R' is alkyl and greater than 6 carbon atoms when R' is otherwise, as hereinbefore discussed. Polymeric quaternary ammonium salts such as ~(Cl4H32N2)(0H)2]X
wherein "x" has a value of at least 2 may also be employed. The mono-, di- and triamines, including mixed amines, may also be employed as templates either alone or in combination with a quaternary ammonium compound or another template. The exact relationship of various templates when concurrently employed is not clearly understood. Mixtures of two or more templating agents can produce either mixtures of TAPOs or in the instance where one template is more strongly directing than another template the more strongly directing template may control the course of the hydrothermal crystallization wherein with the other template serving primarily to establish the pH conditions of the reaction mixture.
Representative templates include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions;
di-n-propylamine; tripropylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N,N-diethylethanolamine; dicyclohexylamine;
N,N-dimethylethanolamine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine, N-methyl-ethanolamine;
N-methylcy~lohexylamine; 3-methyl-pyridine;
4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine; neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every template will produce every TAPO composition although a single S template can, with proper selection of the reaction conditions, cause the formation of different TAPO
compositions, and a given TAPO composition can be produced using different templates.
In those instances where an aluminum alkoxide is the reactive aluminum source, the corresponding alcohol is necessarily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not as yet been determined whether this alcohol participates in the synthesis process as a templating agent, or in some other function and, accordingly, is not reported as a template in the unit formula of the TAPOs, although such may be acting as templates.
Alkali metal cations, if present in the reaction mixture, may facilitate the crystallization of certain TAPO phases, although the exact function of such cations, when present, in crystallization, if any, is not presently known. Alkali cations present in the reaction mixture generally appear in the formed TAPO
composition, either as occluded (extraneous) cations and/or as structural cations balancing net negative charges at various sites in the crystal lattice. It should be understood that alShough the unit formula for the TAPOs does not specifically recite the presence of alkali cations they are not excluded in the same sense that hydrogen cations and/or hydroxyl groups are not S specifically provided for in the traditional formulae for zeolitic aluminosilicates.
Almost any reactive titanium source may be employed herein. The preferred reactive titanium sources include titanium alkoxides, water-soluble titanates and titanium chelates.
Almost any reactive phosphorus source may be employed. Phosphoric acid is the most suitable phosphorus source employed to date. Accordingly, other acids of phosphorus are generally believed to be lS suitable phosphorus sources for use herein. Organic phosphates such as triethyl phosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlPO4 compositions of U.S.
Patent 4,310,440. Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide have not, apparently, served as reactive sources of phosphorus, but these compounds do function as templating agents and may also be capable of being suitable phosphorus sources under proper process conditions (yet to be ascertained).
Organic phosphorus compounds, e.g., esters, are believed to be generally suitable since they can generate acids of phosphorus in situ. Conventional phosphorus salts, such as sodium metaphosphate, may be used, at least in part as the phosphorus source, but they are not preferred.
Almost any reactive aluminum source may be employed herein. The preferred reactive aluminum sources include aluminum alkoxides, such as aluminum isopropoxide, and pseudoboehmite. Crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but as generally not preferred.
Since the exact nature of the TAPO molecular sieves are not clearly understood at present, although all are believed to contain ~TiO2] tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the TAPO
molecular sieves by means of their chemical composition.
This is due to the low level of titanium present in certain of the TAPO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between titanium, aluminum and phosphorus. As a result, although it is believed that titanium, [Tio2], has substituted isomorphously for _159_ [Al02] or [P02] tetrahedra, it is appropriate to characterize certain TAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides in the as-synthesized and anhydrous form as:
vR : pTio2 : qA12O3 : rP2O5 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "v"
represents an effective amount of the organic templating agent to form said TAP0 compositions and preferably has a value between and including zero and about 3.0; "p", "q" and "r" represent moles, respectively, of titanium, alumina and phosphorus pentoxide, based on said moles being such that they are within the following values for "p", "q" and "r":
Mole Fraction Point ~ g A 0.004 1.0 1.22 B 176 1.0 11.0 C 196 1.0 1.0 D 0O828 1.0 0.0143 E - 0.003 1.0 0.427 The parameters "p", "q" and "r" are preferably within the following values for "p", "q" and "r":
`~ 1336717 Mole Fraction Polnt ~ ~ E
a 0.008 1.0 1.0 b 1.0 1.0 1.0 c 0.80 1.0 0.60 d - 0.333 1.0 0.50 e 0.067 1.0 0.663 ELAPO MOLECULAR SIEVES
"ELAPO" molecular sieves are a class of crystalline molecular sieves in which at least one element capable of forming a three-dimensional microporous framework forms crystal framework structures of AlO2 , PO2 and MO2n tetrahedral oxide units wherein "MO2n" represents at least one different element (other 1~ than Al or P) present as tetrahedral oxide units "MO2n"
with charge "n" where "n" may be -3, -2, -1, 0 or +1.
The members of this novel class of molecular sieve compositions have crystal framework structures of AlO2 , PO2 and MO2n tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)O2; "M" represents at least one element capable - 161 - 1~6717 of forming framework tetrahedral oxides; and "x", "y"
and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. "M" is at least one different (i.e., not aluminum, phosphorus or oxygen) element such that the molecular sieves contain at least one framework tetrahedral unit in addition to AlO2- and PO2+. "M" is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc, subject to certain restrictions on the combinations of elements as will appear from the discussions of individual groups of ELAPOs below. ELAPOs and their preparation are disclosed in European Patent Application Serial No.
85104386.9, filed April 11, 1985 (EPC Publication No.
0158976, published October 13, 1985) and 85104388.5, filed April 11, 1985 (EPC Publication No. 158349, published October 16, 1985.
The "ELAPO" molecular sieves further include numerous species which are intended herein to be within the scope of the term "non-zeolitic molecular sieves"
such being disclosed in the following commonly assigned patents or applications [(A) following a serial number indicates that the application is abandoned and (C) indicates that the application is a continuation of the immediately preceding patent or application):
~,.j U.S. Patent Serial No. Filed 4,913,888 Feb. 19, 1986 AsAPo 4,952,383 March 24, 1987 BAPO
4,940,570 March 3, 1986 BeAPO
4,759,919 Feb. 19, 1986 CAPO
4,888,167 March 20, 1986 GeAPO
4,789,535 Feb. 28, 1986 LiAPo 4,686,093 April 13, 1984 FCAPO
The ELAPO molecular sieves are generally referred to herein by the acronym "ELAPO" to designate - 1~36717 element(s) "M" in a framework of Al02 , P02 and M02n tetrahedral oxide units. Actual class members will be identified by replacing the "EL" of the acronym with the elements present as M02n tetrahedral units. For example, "MgBeAPO" designates a molecular sieve comprised of Al02 , P02 , Mgo2 2 and BeO2 2 tetrahedral units. To identify various structural species which make up each of the subgeneric classes, each species is assigned a number and is identified as "ELAPO-i" wherein "i" is an integer. The given species designation is not intended to denote a similarity in structure to any other species denominated by a similar identification system.
The ELAPO molecular sieves comprise at least one additional element capable of forming framework tetrahedral oxide units (M02n) to form crystal framework structures with Al02 and P02 tetrahedral oxide units wherein "M" represents at least one element capable of forming tetrahedral units "M02n" where "n" is -3, -2, -1, 0 or +1 and is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc.
The ELAPO molecular sieves have crystalline three-dimensional microporous framework structures of Al02 , P02 and M02n tetrahedral units and have an ~ - -165- 133 67 17 empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MXAlyPz)O2;
wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; "M"
represents at least one element capable of forming framewor~ tetrahedral oxides where "M" is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc.
The relative amounts of element(s) "M", aluminum and phosphorus are expressed by the empirical 5 chemical formula (anhydrous):
mR : (MxAlyPz)02 where "x", "y" and "z" represent the mole fractions of said "M", aluminum and phosphorus. The individual mole fractions of each "M" (or when M denotes two or more elements, Ml, M2, M3, etc.) may be represented by "x1", "x ", "x3", etc. wherein "x1", "x2", and X3 etc.
represent the individual mole fractions of elements Ml, M2, M3, and etc. for "M" as above defined. The values of "xl", "x2", "x3ll, etc. are as defined for "x", hereinafter, where "xl" + "x2" + I'x3" . . . = "x" and where xl, x2, X3, etc. are each at least 0.01.
The ELAP0 mo-lecular sieves have crystalline three-dimensiona~l microporo~s framework structures of M02n, Al02 and P02 tetrahedral units having an -empirical chemical composition on an anhydrous basis 5 expressed by the formula:
mR : (MxAlyPz)2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents a molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; "M"
represents at least one different element (other than Al or P) capable of forming framework tetrahedral oxides, as hereinbefore defined, and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides; in general, said mole fractions "x", "y" and "z" are within the following values for "x", "y" and "z", although as will appear hereinbelow, the limits for "x", "y" and "z" may vary slightly with the nature of the element "M":
Mole Fraction Point x y Z
A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 -167- 133 67 1~
Also, in general, in a preferred sub-class of the ELAPOs of this invention, the values of 1'x"; "y" and "z" in the formula above are within the following values for "x", "y" and "z", although again the relevant limits may vary somewhat with the nature of the element "M", as set forth hereinbelow:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 f 0.39 0.60 0.01 EL~PO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between 100C and -168- 13~6717 200C, until crystals of the ELAPO product are obtained, usually a period of from several hours to several weeks.
Typical crystallization times are from about 2 hours to about 30 days with from about 2 hours to about 20 days S being generally employed to obtain crystals of the ELAP0 products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the ELAPO compositions of the instant invention, it is in general preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "~" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and 300; "M" represents at least one element, as above described, capable of forming tetrahedral oxide framework units, MO2n, with AlO2 and PO2+ tetrahedral units; "n" has a value of -3, -2, -1, 0 or +1; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively;
"y" and "z" each have a value of at least 0.01 and "x"
has a value of at least 0.01 with each element "M"
having a mole fraction of at least 0.01. In general, the mole fractions "x", "y" and "z" are preferably within the following values for "x", "y" and "z": -Mole Fraction Point x y z F 0.01 0.60 0.39 G 0.01 0.39 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 Further guidance concerning the preferred reaction mixtures for forming ELAPOs with various elements "M"
will be given below.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (M + Al + P) = (x + y + z) = 1.00 mole, whereas in other cases the reaction mixtures are expressed in terms of molar oxide ratios and may be normalized to 1.00 mole of P205 and/or A1203. This latter form is readily converted to the former form by routine calculations by dividing the total number of moles of "M", aluminum and phospho NS into the moles of each of "M", aluminum and phosphorus. The moles of template and water are similarly normalized by dividing by the total moles of "M", aluminum and phosphorus.
In forming the reaction mixture from which the instant molecular sieves are formed the organic D-146~3 - i336717 templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably nitrogen or phosphorus and most preferably nitrogen, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred compounds for use as templating agents are the amines, quaternary phosphonium compounds and quaternary ammonium compounds, the latter two being represented generally by the formula R4X+ wherein "X" is nitrogen or phosphorus and each R is an alkyl or aryl group containing from 1 to 8 carbon atoms. Polymeric quaternary ammonium salts such as ~(C14H32N2)(OH)2]X
wherein "x" has a value of at least 2 are also suitably employed. The mono-, di- and tri-amines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired ELAPOs or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, `. 1336717 tetrapropylammonium or tetrabutylammonium ions;
tetrapentylammonium ion; di-n-propylamine;
tripropylamine; triethylamine; triethanolamine;
piperidine; cyclohexylamine; 2-methylpyridine;
N,N-dimethylbenzylamine; N,N-dimethylethanolamine;
choline; N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2,) octane; N-methyldiethanolamine;
N-methylethanolamine; N-methylpiperidine;
3-methylpiperidine; N-methylcyclohexylamine;
3-methylpyridine; 4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine, neopentylamine; di-n-pentylamine;
isopropylamine: t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every spécies of ELAPO, i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several ELAPO compositions, and a given ELAPO composition can be produced using several different templating agents. The phosphorus source is preferably phosphoric acid, but organic phosphates such as triethyl phosphate may be satisfactory, and so also may crystalline or amorphous aluminophosphates such as the AlPO4 composition of U.S.P. 4,310,440. Organo-2S phosphorus compounds, such as tetrabutylphosphoniumbromide, do not apparently serve as reactive sources of ~ -`172- 1336717 phosphorus, but these compounds may function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum alkoxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
The element(s) "M" can be introduced into the reaction system in any form which permits the formation in situ of reactive form of the element, i.e., reactive to form the framework tetrahedral oxide unit of the element. The organic and inorganic salts, of "M" such as oxides, alkoxides, hydroxides, halides and carboxylates, may be employed including the chlorides, bromides, iodides, nitrates, sulfates, phosphates, acetates, formates, and alkoxides, including ethoxides, propoxides and the like. Specific preferred reagents for introducing various elements "M" are discussed hereinbelow.
While not essential to the synthesis of ELAP0 compositions, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the ELAPO species to be produced or a topologically similar species, such as aluminophosphate, alumino-silicate or molecular sieve compositions, facilitates the crystallization procedure.
After crystallization the ELAPO product may be isolated and advantageously washed with water and dried in air. The as-synthesized ELAPO generally contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular ELAPO species. As a general rule the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the ELAPO product and must be removed by calcining the ELAPO at temperatures of 200-C to 700C to thermally degrade the organic species. In a few instances the pores of the ELAPO product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein does not include the condition of the ELAP0 phase wherein the organic moiety occupying the intracrystalline pore system as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (MXAlyPz)02 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an alkoxide is employed as the source of element "M", aluminum or phosphorus, the corresponding alcohol is necesc~rily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the synthesis process as a templating agent. For the purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized ELAPO material.
Since the present ELAPO compositions are formed from MO2n, A102 and PO2+ tetrahedral oxide units which, respectively, havé a net charge of "n", (where "m" may be -3, -2, -1, 0 or +1), -1 and +1~ ~ ~ 717 matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between A102- tetrahedra and charge-balancing cations. In the instant compositions, an A102- tetrahedron can be balanced electrically either by association with a PO2+
tetrahedron or a simple cation such as an alkali metal cation, a proton (H+), a cation of "M" present in the reaction mixture, or an organic cation derived from the templating agent. Similarly an MO2n tetrahedron, where "n" is negative, can be balanced electrically by association with PO2+
tetrahedra, a cation of "M" present in the reaction mixture, organic cations derived from the templating agent, a simple cation such as an alkali metal cation, or other divalent or polyvalent metal cation, a proton (H+), or anions or cations introduced from an extraneous source. It has also been postulated that non-adjacent A102- and PO2+
tetrahedral pairs can be balanced by Na+ and OH-respectively (Flanigen and Grose, Molecular Sieve Zeolites-I, ACS, Washington, DC (1971).
AsAPO MOLECULAR SIEVES
The AsAPO molecular sieves have a framework ~,i' ,.., .~
- ` 1336717 structure of AsO2n, A102 and PO2 tetrahedral units - (where "n" is -1 or +1) and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (AsxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (AsxAlyPz~O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", -y" and "z" represent the mole fractions of the elements arsenic, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 20 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 There are two preferred subclasses of the 25 AsAPO molecular sieves, depending upon whether the value of "n" is -1 or +1 (i.e. whether the arsenic is trivalent or pentavalent), it being understood that mixtures of such are permitted in a given AsAPO. When "n" is -1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.01 0.59 0.40 b 0.01 0.39 0.60 c 0.39 0.01 0.60 d 0.59 0.01 0.40 When "n" is +1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y z e 0.01 0.60 0.39 f 0.01 0.40 0.59 g 0-59 0.40 0.01 h 0.39 0.60 0.01 In an especially preferred subclass of the AsAPO molecular sieves in which "n" = +1, the values of x, y and z are as follows:
`- 1336717 Mole Fraction Point x - y z i 0.03 0.52 0.45 j 0.03 0.45 0.52 k 0.08 0.40 0.52 1 0.33 0.40 0.27 m 0.33 0.41 0.26 n 0.22 0.52 0.26 AsAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of arsenic, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the AsAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 12 hours to about 7 days, have been observed. The product is recovered by any convenient method such as ce`ntrifugation or filtration.
In synthesizing the AsAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (ASxAlyPz)2 bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "x", "y" and "z" represent the mole fractions of arsenic, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
-1~0- 1336717 Mole Fraction Point x ~ y z G 0.01 0.60 0.39 H ~ 0.01 0.39 0.60 I 0.39 0.01 0.60 0.98 0.01 0.01 K 0.39 0.60 0.01 - Especially preferred reaction mixtures are those wherein the mole fractions "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.20 0.55 0.25 b 0.20 0.50 .0~30 c 0.30 0.40 0.30 d 0.40 0.40 0.20 e 0.40 0.50 0.10 f 0.35 0.55 0.10 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that tx + y + z) = 1.00 mole. Molecular sieves containing arsenic, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents AsAPO compositions`may be prepared by using numerous reagents. Reagents which may be employed to prepare AsAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) As2O5, arsenic(V) oxide;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures AsAPOs may be prepared by forming a starting 2S reaction mixture by dissolving the arsenic(V) oxide and the H3PO4 in at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent and the resulting mixture blended until a homogeneous mixture is observed.
The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
BAPO MOLECULAR SIEVES
The BAPO molecular sieves have a framework structure of B02-, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (BXAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BXAlyPz)O2 and has a value of zero to about 0.3, "x", "y" and "z" represent the mole fractions of the elements boron, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B - 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In a preferred subclass of the BAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y Z
a 0.01 0O59 0.40 b 0.01 0.39 0060 c 0.39 0.01 0.60 d 0.59 OoOl 0.40 An especially preferred subclass of the BAPO
molecular sieves are those in which the mole fraction, "x", of boron is not greater than about 0.3.
BAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of boron, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Pèriodic Table, and~or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, - 5 preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous préssure at a temperature between about 50~C
and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the BAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 14 days, and preferably about 1 to about 7 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (BXAlyPz)02 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and is an effective amount preferably within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, desirably not greater than about 20, and most desirably ` 1336717 not greater than about 10; and "x", "y" and "z"
represent the mole fractions` of boron, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction lO Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 Especially preferred reaction mixtures are those containing from 0.5 to 2.0 moles of B2O3 and from 0.75 to 1.25 moles of Al2O3 for each mole of P205.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = l.00 mole.
The exact nature of the BAP0 molecular sieves is not entirely understood at present, although all are believed to contain BO2, Al02 and PO2 tetrahedra in the three-dimensional microporous framework structure. The low level of boron present in some of the instant molecular sieves makes it di~fficult to ascertain the exact nature of the interactions among boron, aluminum and phospho~us. As a result, although it is believed that BO2 tetrahedra are present in the three-dimensional microporous framework structure, it is appropriate to characterize certain BAPO compositions in terms of the molar ratios of oxides.
Molecular sieves containing boron, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) boric acid or trimethylborate;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
~ 1336717 (i) Quin: Quinuclidine, (C7~13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures In the preferred method of synthesizing the BAPO compositions, one first combines sources of boron, aluminum and phosphorus to form an amorphous material containing all three elements, and thereafter heats the amorphous material to produce a crystalline BAPO
molecular sieve. It is not necessary that the total quantities of the reactive sources of boron, aluminum and phosphorus to be used in the final reaction mixture be present in the amorphous material, since additional quantities of the elements can be added during the later heat treatment; i`n particular, it has been found convenient to add additional quantities of phosphorus to the amorphous material before the heat treatment. The preliminary formation of the amorphous material assists in the incorporation of the boron into the final molecular sieve.
For example, BAPOs may be prepared by forming a solution of boric acid in a methanolic solution of the templating agent, then adding a hydrated aluminophosphate and water and stirring to form a homogeneous reaction slurry. This slurry is then placed in a lined (polytetrafluoroethylene) "stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
BeAPO MOLECULAR SIEVES
The BeAPO molecular sieves have a framework structure of BeO2-2, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (BxAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BXAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements beryllium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
. .
~'~
~ 189- 1 336717 Mole Fraction Point _ y z A O.Ol 0.60 0.39 B O.Ol 0.39 0.60 C 0.39 O.Ol 0.60 D . 0.60 O.Ol 0.39 E 0.60 0.39 O.Ol F 0.39 0.60 O.Ol In a preferred subclass of the BeAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a O.Ol 0.60 0.39 b O.Ol 0.39 0.60 c 0.35 0.05 0.60 d 0.35 0.60 0.05 In an especially preferred subclass of the BeAPO molecular sieves the values of x, y and z are as follows:
Mole Fraction Point x y z e 0.02 0.46 0.52 f OolO 0.38 0052 g OolO 0O46 0.44 ` . 1~3671~
BeAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of beryllium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250C, and preferably between about 100C and about 200-C until crystals of the BeAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of f~om 2 hours to about 30 days, generally from about 4 hours to about 14 days, and preferably about 1 to about 7 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BeAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (BexAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably`not more than about 1.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 50; and "x", "y" and "z" represent the mole fractions of beryllium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 Especially preferred reaction mixtures are those wherein the mole fractions "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction Point x y z g 0.04 0.46 0.50 h 0.16 0.34 0.50 i 0.17 0.34 0.49 j 0.17 0.43 0.40 k 0.14 0.46 0.40 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing beryllium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents BeAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BeAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) beryllium sulfate:
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7~2NH7 (h) Pr3N: tri-n-propylamine, (C3H7)3N;
(1) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide;
and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures BeAPOs may be prepared by forming a starting reaction mixture by dissolving the beryllium sulfate and the H3PO4 in at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent and the resulting mixture blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
CAPO MOLECULAR SIEVES
The CAPO molecular sieves have a framework structure of CrO2n, AlO2- and PO2+
tetrahedral units (where "n" is -1, 0 or +1) and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (CrxAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CrxAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements chromium, aluminum and phosphorus, respectively, present as tetrahedral oxides. When "n" is -1 or +1, the mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.010.60 0.39 B 0.010.39 0.60 C 0.390.01 0.60 D 0.600.01 0.39 E 0.600.39 0.01 F 0.390.60 0.01 A~
l95- 13367I7 When "n" is 0, the mole fractions "x", "y" and "z" are -generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 5 Point x v z G 0.01 0.60 0.39 H 0.01 0.47 0.52 I 0.94 0.01 0.05 J 0.98 0.01 0.01 K 0.39 0.60 0.01 There are three preferred subclasses of the CAPO molecular sieves, depending upon whether the value of "n" is -l, 0 or +1 (i.e. whether the chromium has an oxidation number of 3, 4 or 5), it being understood that mixtures of such are permitted in a given CAPO. When "n" is -1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.01 0.59 0O40 b 0.01 0.39 0.60 c 0.39 0.01 0.60 d 0.59 0.01 0.40 In an especially preferred subclass of these CAPSO molecular sieves in which "n" = -1, the values of x, y and z are as follows:
- . -196- 1336717 Mole Fraction Point x y z n 0.01 0.52 0.47 o 0.01 0.42 0.57 p 0.03 0.40 0.57 q - 0.07 0.40 0.53 r 0.07 0.47 0.46 s 0.02 0.52 0.46 When "n" is 0, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z e 0.01 0.60 0O39 lS f 0.01 0.47 0.52 g 0.50 0.225 0.275 h 0.50 0.40 0.10 i 0.30 0.60 0.10 When "n" is +1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z j 0.01 0.60 0.39 k 0.01 0.40 0.59 1 0.59 0.40 0.01 m - 0.39 0.60 0.10 Since the exact nature of the CAPO molecular sieves is not clearly understood at present, although all are believed to contain CrO2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the CAP0 molecular sieves by means of their chemical composition.
This is due to the low level of chromium present in certain of the CAPO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between chromium, aluminum and phosphorus. As a result, although it is believed that CrO2 tetrahedra are substituted isomorphously for A102 or PO2 tetrahedra, it is appropriate to characterize certain CAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
CAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of chromium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50~C
and about 250-C, and preferably between about 100C and about 200-C until crystals of the CAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CrxAlyPz)o2 : bH2O
wherein UR" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.6;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "x", "y" and "z" represent the mole fractions of chromium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z L 0.01 0.60 0.39 M 0.01 0.39 0.60 N 0.39 0.01 0.60 O 0.98 0.01 0.01 P 0.39 0.60 0.01 lS Especially preferred reaction mixtures are those containing from about 0.1 to about 0.4 moles of chromium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing chromium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents CAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare CAPOs include:
(a) aluminum isopropoxide, or aluminum chlorhydrol;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) chromium(III) orthophosphate, chromium(III) acetate and chromium acetate hydroxide, (Cr3(OH)2(CH3COO)7);
(e) TEAOH: 40 weight percent aqueous solution . of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
2S (m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
- Preparative Procedures CAPOs may be prepared by forming a starting reaction mixture by adding aluminum chlorhydrol or aluminum oxide to a solution of chromium acetate hydroxide in water, then adding successively phosphoric acid and the templating agent. Between each addition, and after formation of the final mixture, the mixture is blended until a homogeneous mixture is observed.
Alternatively, the phosphoric acid may be mixed with at least part of the water, and aluminum oxide or isopropoxide mixed in. A solution of chromium acetate hydroxide is then added, followed by the templating agent, and the resultant mixture mixed until homogeneous.
In a third procedure, amorphous chromium phosphate is ground dry with aluminum oxide and the resultant dry mixture added to an aqueous solution of phosphoric acid in an ice bath. The templating agent is then added, and the final mixture mixed until homogeneous.
Whichever technique is employed to produce the reaction mixture, this mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GaAPO MOLECULAR SIEVES
The GaAPO molecular sieves have a framework structure of GaO2~, AlO2- and PO2+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (GaxAlypz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (GaxAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements gallium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
-~203- 1336717 - ~ Mole Fraction Point x ~ y z ~
- A 0.01 0.60 0.39 B - 0.01 0.34 0.65 C 0.34 0.01 0.65 D 0.60 - 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In general, the value of "z" in the GaAP0 molecular sieves is not greater than about 0.60.
In a preferred subclass of the GaAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y z a 0.01 0.59 0.40 b 0.01 0.34 0.65 c 0.34 0.01 0.65 d O.S9 0.01 0.40 In an especially preferred subclass of the GaAPO molecular sieves the values of x, y and z are as follows:
- Mole Fraction Po-nt x ~ y z e 0.03 0.52 0.45 f 0.03 0.33 0.64 g 0.16 0.20 0.64 h 0.25 0.20 0.5S
i 0.25 0.33 0.42 j 0.06 0.52 0.42 GaAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of gallium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the GaAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 7 days, have . ~ 205- 1336717 been observed. The product is recovered by any convenient method such as c~ntrifus2tion or filtration.~
In synthesizing the GaAP0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GaxAlyPz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "~" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about S00, preferably between about 2 and about 300, most preferably between about 2 and about 20; and "x", "y"
and "zi' represent the mole fractions of gall,ium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
- 13367i7 Mole Fraction Point x- ~ y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 - Especially preferred reaction mixtures are those containing from 0.2 to 0.5 mole of Ga203 and from 0.3 to 1 mole of A1203 for each mole of P205.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing gallium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents Ga~PO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GaAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) gallium sulfate or gallium(III) hydroxide;
_ 07_ 1 33 6 71 7 (e) TEAOH: 40 weight percent aqueous solution of tetraethyl~ammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
S (g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7Hl3N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures GaAPOs may be prepared by forming a starting reaction mixture by mixing the phosphoric acid with at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the gallium sulfate or gallium hydroxide and the templating agent are successively added and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, the aluminum oxide may be mixed with a solution of the gallium sulfate or hydroxide, and then the phosphoric acid and the templating agent successively added. The resulting mixture is then blended until a homogeneous mixture is observed.
In a third process, the templating agent may be dissolved in water, the gallium hydroxide or sulfate added with stirring, a solution of the phosphoric acid added, and finally the aluminum oxide mixed in. The resulting mixture is then blended until a homogeneous mixture is observed.
Whichever technique is employed to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GeAPO MOLECULAR SIEVES
The GeAPO molecular sieves have a framework structure of GeO2, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (GexAlypz)o2 wherein "R' represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of ~;~.~
. . .,~
(GexAlyPz)02 and has a value of zero to about 0.~3, but is preferably not greater than 0.2: and "x", "y" and "z"
represent the mole fractions of the elements germanium, - aluminum and phosphorus, respectively, present as `5 tetrahedral oxides. The mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.47 O.S2 C 0.94 0.01 0.05 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the GeAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point _ y z a 0.01 0.60 0.39 b 0.01 0.47 0.52 c 0.50 0.225 0.275 d 0.50 0.40 0.10 e 0.30 0.60 0.10 An especially preferred subclass of the GeAP0 molecular sieves are those i~n which the value of "x" is not greater than about 0.13.
GeAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of germanium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50~C
and about 250~C, and preferably between about 100C and about 200C, until crystals of the GeAP0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GeAPO compositions, it is preferred to employ a reaction mixture composition 5 expressed in terms of the molar ratios as follows:
aR : (GexAlyPz)02 : bH20 - 1~36717 :-211-wherein "R" is an organic templating agent; "a" is the ~
~ amount of organic templating~agent "R" and has a value . of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.6;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably between about 10 and about 60; and "x", "y"
and "z" represent the mole fractions of germanium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z F 0.01 0.60 0.39 G 0.01 0.39 0.60 H 0.39 0.01 0060 I 0.98 0.01 OoO1 J 0.39 0.60 0.01 Especially preferred reaction mixtures are those containing from 0.2 to 0.4 mole of GeO2 and from 0.75 to 1.25 mole of Al203 for each mole of P205.
.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z)`= 1.00 mole. Molecular sieves containing S germanium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents GeAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GeAPOs include:
(a) aluminum isopropoxide:
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) germanium tetrachloride, germanium ethoxide and germanium dioxide;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (~7H13NCH3OH);
(k) C-hex: cyclohexylamine;
- (l) TMAOH: tetramethylammonium hydroxide; ~ -- (m) TPAOH: tetrapropylammonium hydrorxide; and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures In some cases, it may be advantageous, when synthesizing the GeA-PO compositions, to first combine sources of germanium and aluminum, to form a mixed germanium/aluminum compound ~this compound being typically a mixed oxide) and thereafter to combine this mixed compound with a source of phosphorus to form the final GeAPO composition. Such mixed oxides may be prepared for example by hydrolyzing aqueous solutions containing germanium tetrachloride and aluminum chlorhydrol, or aluminum tri-sec-butoxide.
GeAPOs may be prepared by forming a starting reaction mixture by mixing the phosphoric acid with at least part of the water. To this solution is added the mixed germanium/aluminum oxide prepared as described above. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent is added and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, to a solution of aluminum isopropoxide may be added germanium ethoxide. The resultant solution may optionally be dried to produce a mixed oxide. To the mixed solution or dried oxide are added successively the phosphoric acid and the templating agent. The resulting mixture is then blended until a homogeneous mixture is observed.
In a third process, a solution is formed by dissolving the phosphoric acid in water, adding aluminum oxide or isopropoxide and mixing thoroughly. To the resultant mixture is added a solution containing the templating agent and germanium dioxide. The resulting mixture is then blended until a homogeneous mixture is observed.
Whichever technique is employed to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
LiAPO MOLECULAR SIEVES
The LiAPO molecular sieves of U.S. Patent No. 4,789,535 have a framework structure of Lio2-3, AlO2+ and PO2+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (LiXAlypz)o2 :-215- 1336717 - - wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (LiXAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements lithium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0O39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In a preferred subclass of the LiAPo molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
- ~- Mole Fraction Point x -y z a 0.01 0.60 0.39 b 0.01 0.39 0.60 c 0.35 0.05 0.60 d 0.35 0.60 O.OS
In an especially preferred subclass of the LiAP0 molecular sieves the values of x, y and z are within the following limits:
Mole Fraction Point x y z e 0.01 O.S2 0.47 f 0.01 0.47 0.52 g 0.03 0.45 0.52 h 0.10 0.45 0.45 i 0.10 0.49 0.41 j 0.07 O.S2 0.41 LiAPo compositions are generally synthesized by hydrothermal crystallization from a reaction mixture cont~;n;ng reactive sources of lithium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as :,217- 1336717 polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C
and about 250-C, and preferably between about 100C and about 200-C until crystals of the LiAPo product are obtained, usually a period of from several hours to several wee~s. Typical effective times of from 2 hours to about 30 days, generally from about 12 hours to about 5 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the LiAPo compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (LiXAlyPz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 2; "b"
has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 40; and "x", "y" and "z" represent the mole fractions of lithium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 In an especially preferred subclass of the reaction mixtures, the values of "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x Y z l 0.03 O.5o 0.47 m 0.03 0.45 0.52 n 0.08 0.40 0.52 o 0.10 0.40 0.50 q 0.04 0.50 0.46 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole.
Since the exact nature of the LiAPO molecular sieves is not clearly understood at present, although F2l9- 1336717 all are believed to contain Lio2 tetrahedra in the three-dimensional microporo~s crystal framework structure, it is advantageous to characterize the LiAPo molecular sieves by means of their chemical composition.
This is due to the low level of lithium present in certain of the LiAPo molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between lithium, aluminum and phosphorus. As a result, although it is believed that Lio2 tetrahedra are substituted isomorphously for Al02 or P02 tetrahedra, it is appropriate to characterize certain LiAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
.Molecular sieves containing lithium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Rea~ents LiAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare LiAPos include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3P04: 85 weight percent aqueous phosphoric acid;
(d) lithium suifate or lithium orthophosphate;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
- (h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(l) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures LiAPos may be prepared by forming a starting reaction mixture by suspending aluminum oxide in at least part of the water. To this mixture the templating agent is added. The resultant mixture is then blended until a homogeneous mixture is observed. To this mixture the lithium phosphate or sulfate is added and the resulting mixture blended until a homogeneous mixture is observed. Alternatively, an initial mixture may be formed by mixing aluminum oxide and lithium phosphate or sulfate. To the resultant mixture are added successively phosphoric acid and an aqueous solution of the templating agent, and the resulting mixture blended until a homogeneous mixture is observed.
In a third procedure, the phosphoric acid is mixed with at least part of the water, and the aluminum oxide is mixed in. To the resultant mixture are added lithium sulfate and the templating agent, and the resulting mixture blended until a homogeneous mixture is observed.
Whichever procedure is adopted to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
FeTiAPO MOLECULAR SIEVES
The FeTiAPO molecular sieves have three-dimensional microporous framework structures of FeO2n, TiO2, AlO2- and P02+ tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (MXAlyPz)o2 ~..
wherein "R" represents at least one o~rganic templating agent present in the intr~c~ystalline pore system; "M"
represents iron and titanium; "m" represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero (0) to about 0.3; and "x", "y" and "z"
represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39. 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the FeTiAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
~23 1336717 .
Mole Fraction Point x ~ y z a ~0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 -f 0.39 0.60 0.01 FeTiAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of iron, titanium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250C, and preferably between about 100C and about 200C until crystals of the FeTiAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally-from about 12 hours to about 2S S days, have been observed. The product is recovered by -~ 1336717 any convenient method such as centrifugation or filtration.
In synthesizing the FeTiAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about S00, preferably between about 2 and about 300; and "x", "y"
and "z" represent the mole fractions of "M" (iron and titanium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x v z F 0.02 0.60 0038 G 0.02 0c38 0.60 H 0O39 0.01 0.60 2S I 0.98 0.01 0.01 J 0.39 0.60 0.01 1~36717 In the foregoing expression of the reaction composition, the reactants àre normalized with respect to the total of "x", "y" and "z" such that (x + y + zj = 1.00 mole.
Molecular sieves containing iron, titanium, aluminum and phosphorus as framewor~ tetrahedral oxide units are prépared as follows:
Preparative Reaqents FeTiAPO compositions may be prepared by using numerous reagents. The preferred sources of iron and titanium for preparing FeTiAPOs are the same as those for preparing the FeAPOs and TiAPOs already described above. Other reagents which may be employed to prepare FeTiAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(e) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3N: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N):
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(j) C-hex: cycloherylamine;
(k) TMAOH: tetramethylammonium hydroxide;
(1) TPAOH: tetrapropylammonium hydroxide;
and (m) DEEA: 2 -diethylaminoethanol.
Preparative Procedures FeTiAPOs may be prepared by forming a homogeneous reaction mixture containing reactive sources of iron, titanium, aluminum and phosphorus.
The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
XAPO MOLECULAR SIEVES
The XAPO molecular sieves have a three-dimensional microporous framework structures of MO2n, AlO2- and P02+ tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (MXAlypz)o2 ~,,' --2 ? 7--wherein "R" represents at least one organic templating agent present in the intracr~stalline pore system; "M"
represents at least one element from each of the classes of: 1) iron and titanium; and 2) cobalt, magnesium, manganese and zinc; "n" is 0, -1 or -2; "m" represents a molar amount of "R" present per mole of (MXAlyPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0 r 60 D 0.98 0.01 0.01 ~ E 0.39 0.60 0.01 In a preferred subclass of the XAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point ~ x ~ y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 -f 0.39 0.60 0.01 XA~O compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or lS optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C
and about 250-C, and preferably between about lOO~C and about 200-C until crystals of the XAP0 product are obtained, usually a period of from several hours to several wee~s. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 2S 20 days, have been observed. The product is recovered ~ -229- 1336717 by any convenient method such as centrifugation or filtration. ~ ~ f In synthesizing the XAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (MxAlyPz)2 bH2 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "M" represents at least one element from each of the classes of: l) iron and titanium; and 2) cobalt, magnesium, manganese and zinc; "b" has a value of from zero (03 to about S00, preferably between about 2 and about 300; and NX~ y~ and "z" represent the mole fractions of "M" (iron and/or titanium, and at least one of cobalt, magnesium, manganese and zinc), aluminum and phosphorus, respectively, and éach has a value of at least 0.01, with the proviso that "x" has a value of at least 0.02.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
~ ~ Mole Fraction Point ~ y z F 0.02 0.60 0.38 G 0.02 0.38 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z-- such that (x + y + z) = 1.00 mole.
XAPO molecular sieves are prepared as follows:
Prezarative Reagents XAPO compositions may be prepared by using numerous reagents. The preferred sources of elements "M" for preparing XAPOs are the same as those for preparing other APOs containing the same elements, as described above and below. Other reagents which may be employed to prepare XAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(e) TBAOH: 40 weight percent aql ~ 717 solution of tetrabutylammonium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3N: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N);
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(j) C-hex: cyclohexylamine;
(k) TMAOH: tetramethylammonium hydroxide;
(1) TPAOH: tetrapropylammonium hydroxide; and (m) DEEA: 2-diethylaminoethanol.
Preparative Procedures XAPOs may be prepared by forming a homogeneous reaction mixture containing reactive sources of elements "M", aluminum and phosphorus. The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
MIXED-ELEMENT APO MOLECULAR SIEVES
The mixed element APO molecular sieves have a framework structure of MO2n, A102 and P02+
tetrahedral units, ~: `
. -; .~
~-232- 1336717 wherein M02n represents at least two different eiements present as t~trahedral units "M02n" with charge~"n", where "n" may be -3, -2, -1, 0 or +1. One of the elements "M" is selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium, while a second one of the elements "M" is selected from the group consisting of cobalt, iron, magnesium, manganese, titanium and zinc.
Preferably, "M" is a mixture of lithium and magnesium.
The mixed-element molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)02 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (LiXAlyPz)02 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements "M"
(i.e. "x" is the total of the mole fractions of the two or more elements "M"), aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 1 3 3 6 717 Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the mixed-element APO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 f 0.39 0.60 0.01 An especially preferred subclass of the mixed element APO molecular sieves are those in which the value of x is not greater than about 0.10.
A second group (FCAPO's) of mixed element APO
molecular sieves described in U. S. Patent No.
4,686,093 issued August 11, 1987, have a framework structure of M02n, A102- and P02+ tetrahedral units, wherein MO2n represents at least two different elements which are present as tetrahedral units "M02n" with charge "nU, where "n" may be -3, -2, -1, 0 or +1 and which are selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium. These mixed-element molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; and "x", "y" and "z" represent the mole fractions of the elements "M" (i.e. "x" is the total of the mole fractions of the two or more elements "M"), aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
.
- - Mole-Fraction Point x - y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of these mixed-element APO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 OoOl f 0.39 0.60 0.01 The mixed-element APO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a ` - 36- 1336717 - sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO C and about 200-C until crystals of the AP0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 12 hours to about 5 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the mixed-element APO
compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about S00, preferably between about 2 and about 300, most 2S preferably not greater than about 20, and most desirably not more than about 10; and "x", "y" and "z" represent ~-237-- the mole fractions of "M", aluminum and phosphorus, respectively, "y" and "z" each having a value of at least 0.01 and "x" having a value of at least 0.02, with each element "M" having a mole fraction of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z F 0.02 0.60 0.38 G 0.02 0.38 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 Preferred reaction mixtures are those cont~;ning not more than about 0.2 moles of the metals "M" per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole.
Since the exact nature of the mixed-element APO molecular sieves is not clearly understood at present, although all are believed to contain M02 - 23~- 1336717 tetrahedra in the three-dimensional microporous crystal framework structure, it is -advantaseous to characterize the mixed-element APO molecular sieves by means of their chemical composition. This is due to the low level of the elements "M" present in certain of the mixed-element APO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between the metals "M", aluminum and phosphorus. As a result, although it is believed that MO2 tetrahedra are substituted isomorphously for A102 or PO2 tetrahedra, it is appropriate to characterize certain mixed-element APO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
Molecular sieves containing the metals "M", aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents Mixed-element APO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare mixed-element APOs include:
(a) aluminum isopropcxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
~d) lithium phosphate or magnesium hydroxide - 1~36717 or appropriate salts of the other elements "M",~as described akove;
(e) TEAOH: 40 weight percent aqueous solution - of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution . of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
PreDarative Procedures Mixed element APOs may be prepared by forming a starting reaction mixture by mixing aluminum oxide, magnesium hydroxide, lithium phosphate (or the corresponding salts of the other elements "M"). To this mixture the phosphoric acid is added. The resultant mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent is added and the resulting mixture blended until a homogeneous mixture is observed.
- The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
It has now been discovered that the product distribution obtained in the aforementioned dehydration/deamination reactions of alkanolamines can be improved by using as the catalyst in such reactions certain selected molecular sieves.
~5~ 1336717 SummarY of the Invention This invention provides a process for the conversion of a hydroxyalkylamine starting material to at least one of an amine, a different hydroxyalkylamine and an aziridine, which process comprises contacting the starting material with a molecular sieve selected from the group consisting of (a) non-zeolitic molecular sieves; and (b) zeolites having a silicon:aluminum ratio of at least about 6, the contacting of the starting material with the molecular sieve being effected under conditions effective to convert the starting material into at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine.
Detailed Description of the Invention As already mentioned, the molecular sieves used in the process of the present invention are of three types, namely (a) non-zeolitic molecular sieves;
and (b) zeolites having a silicon:aluminum ratio of at least about 6 (hereinafter referred to as "high-silica zeolites"). The term "non-zeolitic molecular sieve" is used herein to mean non-zeolitic molecular sieves of the aluminophosphate and silicoaluminophosphate types. Such non-zeolitic molecular sieves comprise a large number of aluminophosphates and silicoaluminophosphates having a variety of crystal structures, which may include one or more other elements in addition to aluminum, phosphorus and silicon. Since many of the non-zeolitic molecular sieves are not described in U.S. Patents, and some are not described in publically-available literature, much material describing these non-zeolitic molecular sieves has to be repeated herein. However, for the convenience of the reader, the manner in which the molecular sieves are used in the process of the present invention will first be described, and thereafter the chemical nature, and methods for the preparation, of the molecular sieves will be described.
PROCESS OF THE I~v~NllON
As already mentioned, in the process of the present invention an alkanolamine starting material is contacted with one of a selected group of molecular sieves to produce at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine. The process of the present invention is especially useful for the conversion of monoethanolamine to at least one of ethylenimine, piperazine, substituted piperazines, pyrazine, aminoethanolamine, diethanolamine, ethylenediamine, substituted ethyleneimines, ethylamine, acetonitrile and morpholine, but may also be used for the conversion of other ~lk~nolamines~ for example the conversion of propanolamine (~-hydroxypropylamine) to propylenimine (2-methylaziridine) and other products.
The products of the process of the present invention may include both acyclic and cyclic amines and hydroxyalkylamines. The cyclic products may include both monocyclic materials, for example piperazine, pyrazine and morpholine, and products containing more tkan one ring. For example, it has been found that, under certain conditions, when one or more of monoethanolamine, piperazine, ethylene glycol, aminoethylpiperazine, hydroxyethylpiperazine, ethylenediamine and other ethyleneamines and ethanolamines (or certain other starting materials) are subjected to the process of the present invention the products selectively include 1,4-diazabicyclot2,2,2]octane (DABCO). Also, it has been found that, under certain conditions, when one or more of piperazine, propylene glycol, isopropanolamine and other methylated ethyleneamines and methylated ethanolamines (or certain other starting materials) are subjected to the process of the present invention the products selectively include a mixture of 2-methyl-1,4-diazabicyclo~2,2,2]octane (methyl DABC0) and 1,4-diazabicyclo[2,2,2]octane (DABCO). The preferred catalysts for the above conversions include Silicalite, a microporous form of silica described in U.S. Patent No. 4,061,724 issued December 6, 1977 to R.W. Grose et al., and Silicalite treated with phosphoric acid or phosphoric acid equivalents such as diammonium hydrogen phosphate.
Also as already mentioned, the aluminophosphate or silicoaluminophosphate non-zeolitic molecular sieves useful in the process of the present invention are described in detail below. Examples of such non-zeolitic molecular sieves which may be used in the present invention include:
(a) the AlPO4's described and claimed in U.S. Patent 4,310,440, issued January 12, 1982 to Wilson et al.; illustrative AlPO4 species are AlPO4-5, AlPO4-11, AlPO4-14, AlPO4-17 and AlPO4-31;
(b) the magnesium, manganese, cobalt and zinc aluminophosphate molecular sieves described and claimed in U.S. Patent 4,567,029, issued January 28, 1986 to Wilson et al.; illustrative species are MgAPO-ll, MgAPO-34, MgAPO-35 and CoAPO-34;
(c) the iron aluminophosphate molecular sieves described and claimed in U.S. Patent 4,554,143, issued November 19, 1985 to Messina et al.; an illustrative species is FeAPO-ll;
(d) the silicoaluminophosphate molecular sieves described and claimed in U.S. Patent 4,440,871 issued April 23, 1984 to Lok et al.;
illustrative species are SAPO-5 and SAPO-34;
(e) the magnesium silicoaluminophosphate molecular sieves described and claimed in U.S.
, ~. ;.
,,~
Patent No. 4,758,419; an illustrative species is MgAPSO-34; and (f) the cobalt silicoaluminophosphate molecular sieves described and claimed in U.S.
Patent No. 4,744,970; an illustrative species is CoAPSO-34.
The preferred zeolites having a silicon:aluminum ratio of at least about 6 for use in the process of the present invention are those described and claimed in U.S. Patent No. 4,257,885, issued March 24, 1981 to Grose et al. and assigned to the same assignee as this application. These high-silica zeolites have a structure related to the pentasil type, and are prepared by crystallization from a reaction mixture containing a metal cation selected from Groups I and II of the Periodic System of Elements, particularly lithium, barium, calcium and strontium. A particularly preferred species of this group of zeolites is LZ-105, manufactured by Union Carbide Corporation.
It is well-known to those skilled in the art of molecular sieve catalysis that many molecular sieve catalyzed reactions operate by Bronsted acid catalysis. Experimentally, the relative Bronsted acidities of molecular sieves can be determined from the rates at which they catalyze hydrocarbon cracking; the higher the acidity, the higher the n-butane cracking rate constant. However, there is no significant correlation between the f -lo- 1336717 n-butane cracking rate constants of the various molecular sieves and their activities in the process of the present invention. Moreover, some of the AlPO4 aluminophosphate molecular sieves of U.S. Patent No.
4,310, 440 (described in detail below), exhibit relatively high activity in the process of the present invention, despite the fact that, because of their charge-balanced framework, these materials exhibit virtually no Bronsted acidity.
Moreover, the activity of the catalysts in the process of the present invention is not simply a function of pore size, since significant activities have been achieved with molecular sieves having pore sizes ranging from 4.3 to 8 A.
One factor which does appear to affect the selectivity of the catalyst to particular products is the ability of the catalyst to adsorb these products.
For example, in the preferred process of the present invention in which monoethanolamine is converted to ethylenimine and other products, it has been found that molecular sieves which strongly adsorb ethylenimine do not produce significant amounts of ethylenimine, even though they are active in the conversion of monoethanolamine to other products. Similar results may be expected in, for example, the conversion of monopropanolamine to propylenimine.
- 13~6717-In their as-synthesized form, the non-zeolitic molecular sieves contain within their internal pore systems at least one form of the organic templating agents used in their synthesis. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation, and indeed this is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular species of molecular sieve. As a general rule the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the molecular sieve and must be removed by calcining the molecular sieve in air at temperatures of 200- to 700-C, preferably about 350 to about 600C, to thermally degrade the organic species. In a few instances the pores of the molecular sieve are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures, such as hydrotreating or chemical treatment such as solvent extraction, which will be familiar to those skilled in the molecular sieve art. In some cases, the organic templating agent may be removed in situ by placing the molecular sieve still containing the organic templating agent in the reactor, so that the organic templating agent is removed under reaction conditions.
The process of the present invention may be conducted with the alkanolamine starting material in the liquid phase. However, in view of the temperatures which are needed ln practice to carry out the process of the present invention at an economical rate, it is preferred that the process of the present invention be operated as a heterogeneous, gas phase reaction with the starting material in the gaseous phase, since a gas phase process can be run at higher temperatures under relatively moderate pressures (typically of the order of a few atmospheres) using comparàtively inexpensive equipment.
In such a gas phase process, the starting material may be mixed with a carrier gas (such as nitrogen or ammonia), while being contacted with the molecular sieve; the carrier gas should of course be chosen so that it does not prevent the preparation of the desired products. However, the use of such a carrier gas is not essential in the process of the present invention, which can be operated using pure alkanolamine starting material as the gaseous feed. The degree of dilution of the starting material with such an inert carrier gas may vary considerably depending upon any process constraints restricting the use of inert diluents. (For example, in commercial production, the use of very large quantities of inert carrier gas is disadvantageous due to the-co~st of pumping large volumes of gas and increased difficulty in isolating the product, which increase the energy costs of the process.) If the process of the present invention is to be carried out using an inert gas, in general it is recommended that the alkanolamine starting material constitute from about 1 to about 95, and preferably about 9 to about 30, mole percent of the starting material/inert gas feed. Increasing the dilution of the starting material tends to increase the selectivity of the reaction to the particular products desired, but is otherwise disadvantageous.
Selection of the temperature at which the process of the present invention is to be conducted involves a compromise between selectivity to the desired product(s) and conversion of the alkanolamine starting material. It is recommended that the process of the present invention be condùcted at a temperature in the range of about 250-C to about 500-C; below this temperature range, the reaction tends to proceed too slowly, while at very high temperatures, the selectivity to the desired products decreases dramatically. At least for monoethanolamine conversion, the preferred temperature range is from about 350-C to about 425-C.
The process of the present invention can be run over a wide range of pressures ranging from atmospheric or sub-atmospheric pressures to looo psig.
(6.9 MPa.) or more. However, since the use of very high pressures has not been observed to confer any - significant advantages but increases equipment costs, it is recommended that the process of the present invention be carried out at a pressure of from about atmospheric pressure to about 1000 psig. (about 7 MPa.).
The process of the present invention can also be carried out over a wide range of weight hourly space velocities of the alkanolamine starting material. For example, weight hourly space velocities of from about 0.1 to about 50 may be employed, with the preferred range of weight hourly space velocity being from about 0.5 to about 10, based on the starting material.
The molecular sieve catalysts used in the process of the present invention enable the reaction to be carried out at high conversions. As illustrated in the Examples below, the process of the present invention can be carried out at a conversion of at least about 30%-As with some reactions catalyzed by molecular - sieves, the conversion achieved in the process of the present invention may tend to fall as the time for which the molecular sieve catalyst has been used in the process increases. If the molecular sieve catalysts become deactivated, then the deactivated catalyst can readily be regenerated by heating in air at an -15- , 1336717 appropriate temperature (typically about 500 D C) and for an appropriate period (typically one hour). It is one of the advantages of the process of the present invention that at least some of the instant catalysts can be run for at least 40 hours of operation without the need for reactivation, whereas some of the prior art catalysts used for the same conversions rapidly deactivate.
The molecular sieve may be modified by depositing or impregnating the molecular sieve with cations, anions or salts so as to improve its efficacy as a catalyst in the process of the present invention.
Techniques which may be employed to effect the deposition or impregnation of a molecular sieve are generally known in the art. Such techniques may involve such procedures as (1) impregnating the molecular sieve with a solution comprising a solvent or solubilizing agent of one or more such modifying materials in an amount sufficient to deposit the desired weight of such materials in the molecular sieve and/or (2) exchanging the molecular sieve with a solution containing the modifying material. The impregnation or deposition of the modifying materials may generally be accomplished by heating the molecular sieve at an elevated temperature to evaporate any liquid present to effect deposition or impregnation of the modifying material on to the interior and/or exterior surface of the molecular sieve, or by the exchange of cations present in the molecular sieve with cations that provide for the desired properties (provided of course that the molecular sieve is one having a significant ion-exchange capacity).
Alternatively, the modifying material may be formed on the molecular sieve from a solution, an emulsion or a slurry containing the modifying materiaL
Impregnation or exchange procedures are generally the preferred techniques because they utilize and introduce the modifying material more efficiently than other procedures such as coating procedures since a coating procedure is generally not able to effect substantial introduction of the modifying material on to the interior surfaces of the molecular sieve. In addition, coated materials are more generally susceptible to the loss of the modifying materials by abrasion.
Suitable modifying materials include alkali metals, alkaline earth metals, transition metals and the salts thereof including inorganic and organic salts such - as nitrates, halides, hydroxides, sulfates and carboxylates. Other modifying materials generally employed in the art are also believed to be employable in the molecular sieves.
In carrying out the process of the present invention, the molecular sieves may be admixed (blended) or provided sequentially to other materials which may provide some property which is beneficial under process conditions, such as improved temperature resistance or improved catalyst life by minimization of coking, or which are simply inert under the process conditions used. Such materials may include synthetic or naturally-occurring substances as well as inorganic materials such as clays, silicas, aluminas, metal oxides and mixtures thereof. In addition, the molecular sieves may be formed with materials such as silica, alumina, silica-alumina, silica-magnesia, silica-zirconia, silica-thoria, silica-berylia, and silica-titania, as well as ternary compositions, such as silica-alumina-thoria, silica-alumina-zirconia and clays present as binders. The relative proportions of the above materials and the-molecular sieves may vary widely with the molecular sievé content ranging between about 1 and about 99 percent by weight of the composite.
~ he following Examples are provided to further illustrate the process of the present invention, but are not limitative thereof. Unless otherwise specified, all parts, proportions etc. are by weight.
EXAMPLES
The following Examples illustrate the use of AlP04-5, AlP04-11, AlP04-14, AlP04-17, AlP04-31, CoAP0-34, FeAP0-34, MgAP0-11, MgAP0-34, MgAP0-35, SAP0-5, SAP0-34, CoAPS0-34, MgAPS0-34 and LZ-105 in the process of the present invention. The characteristic X-13~6717 ray tables for AlPO4-5, AlPO4-11, AlPO4-14, and AlPO4-17 are given in U.S. Patent No. ~4,310,440 at Table 2 in column 8, Table 8 in column 15, Table 12 in column 21, and Table 15 in column 26 respectively. The ALPO4-31 was produced as described in U.S. Patent No. 4,310,440, Example 54. The characteristic X-ray tables for CoAPO-34, MgAP0-11, MgAPO-34 and MgAPO-35 are given in U.S. Patent No. 4,567,029 at Table XLI in column 91, Table III in column 17, Table X in column 31 and Table XI in column 33 respectively. The characteristic X-ray table for FeAPO-34 is given in U.S. Patent No. 4,554,143 at Table XI in column 29. The characteristic X-ray tables for SAPO-5 and SAPO-34 are given in U.S. Patent No. 4,440,871 at Table I in column 20 and Table XI in column 44 respectively. The characteristic X-ray tables for CoAPSO-34 and MgAPSO-34 are given below:
CoAPSO-34 2e d (A) Relative Intensity 9.4 - 9.8 9.41 - 9.03 s - vs 2012.86 - 13-.06 6.86 - 6.76 w 14.08 - 14.30 6.28 - 6.19 w - m 15.90 - 16.20 5.57 - 5.47 vw- m 20.60 - 20.83 4.31 - 4.26 w - vs 30.50 - 30.80 2.931 - 2.903w - m MgAPS0-34 2~ d (A~ Relative Intensity 9.3 - 9.7 9.51 - 9.12 vs 15.8 - 16.3 5.61 - 5.44 w - m 20.25 - 21.0 4.39 - 4.23 m - vs 3025.7 - 26.3 3.466 - 3.389vw- m 30.0 - 30.8 2.979 - 2.903vw- m 30.9 - 31.4 2.894 - 2.849w - m Ex~erimental Conditions The various molecul~ar sieve catalysts were prepared as described below, calcined in air following synthesis to remove the organic templating agent, and then calcined for one hour under nitrogen at the reaction temperature prior to use. Between each run, the catalysts were regenerated by calcination at 500C
in air for 1 to 12 hours.
Two separate microreactors were used. The first micro reactor consisted of a 1/4 inch (6 mm.) diameter stainless steel U-tube heated in a fluidized sand bath. Approximately l gram of catalyst as the powder was dispersed among several grams of 20-30 U. S.
mesh quartz chips and placed in the heated zone of the reactor. Connected to the inlet of the reactor were a source of nitrogen or ammonia carrier gas and a liquid feed line containing monoethanolamine connected to a high pressure liquid chromatography (HPLC) type solvent pump. To the outlet of the U-tube was connected a room temperature liquids trap, followed by a heated port for gas sampling. It was determined that ethylenimine was not being collected in the liquids trap to any appreciable extent. The gases from the heated port were analyzed by gas chromatography on a 6 foot by 1/8 inch (1829 by 3 mm.) column containing Chromosorb 101. The liquid samples from the liquids trap were analyzed by amine derivatization with N-methylbistrifluoroacetamide.
Because of the difficulties of quantitative analysis in two different phases, later experiments used a second microreactor consisting of a 3/8 inch (9 mm.) diameter stainless steel tube encased in a 1 inch (25 mm.) diameter sheath of stainless steel heated with an electric split furnace.
Approximately 1 gram of catalyst as the powder was dispersed among about 5 grams of 20-30 U. S. mesh quartz chips and placed in the heated zone of the reactor. The reactor tube was disposed vertically with a downward flow of reactants and products. The same feed line and source of flow gas were employed as in the first microreactor. Immediately below the reactor was disposed a cold trap kept at 0C. Gas chromatographic analysis of the outlet gas indicated that all of the ethylenimine produced was retained in the cold trap and ammonia and only very small amounts of a material with a retention time similar to that of ethylene passed the trap. The products of the reaction collected in the cold trap were analyzed by gas chromatography on a 12 foot by 1/8 inch (3658 by 3 mm.) column containing TERGITOL*
non-ionic TMN (a polyether liquid phase) and 3 percent sodium methylate on 60/80 Chromasorb W-NAW, or on a 10 foot by 1/8 inch (3048 by 3 mm.) column containing 8 percent TERGITOL* non-ionic E68 and 2 percent potassium hydroxide.
Several experiments were run using both microreactors, and these experiments confirmed that no * Registered Trademark D~14643 -21- 133671~ -appreciable difference in results were produced by the change in reactors.
Examle 1 The first microreactor described above was charged with 1.0 g. of AlPO4-14 and heated to 400C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 1.6 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 70 percent, with a product distribution (based on converted monoethanolamine) as follows:
Product Percentage Piperazine 40 Aminoethylpiperadine 14 Diethanolamine 4 Triethanolamine 10 Aminoethylethanolamine 4 Diethylenetriamine 4 Ethylenimine 3, together with minor amounts of other amines and Alk~nolamines.
Examle 2 The first microreactor described above was charged with 1.0 g. of SAPO-5 and heated to 400C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 0.4 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 30 percent, with a product distribution (based on converted 5 monoethanolamine) as follows: -Product Percentage Piperazine 45 Aminoethylpiperazine 18 Morpholine 15, together with minor amounts of other alkylamines and alkanolamines.
Exam~le 3 The first microreactor described above was charged with 1.0 g. of AlPO4-11 and heated to 350C.
Nitrogen carrier gas was passed through the reactor at a rate of 40 ml/min. at atmospheric pressure, and liquid monoethanolamine was fed into the nitrogen stream at a rate of 0.5 ml/hour. Analysis of the products of the reaction showed a conversion of approximately 5 percent, with ethylenimine constituting about 40 percent of the products, the other products being piperidine, piperazine, ethylamine, morpholine and other nitrogen and/or oxygen-containing products.
Examples 4-16 Various molecular sieves were tested for their activities in the process of the present invention in the same manner as in Examples 1-3 above, except that in 133~717 some cases the second microreactor described above was used. Except as specified in Table 1 below, the experiments were conducted with 1 gram of catalyst in the microreactor, at a reaction temperature of 375C, with nitrogen gas flowing at a rate of 40 ml/min. and monoethanolamine flowing at a rate of 1.6 ml/hr. The results are shown in Table 1 below, in which the following abbreviations are used:
Abbreviation Full Term 10 Conv. Conversion EI Ethylenimine PIP Piperazine AEP Aminoethylpiperazine AEEA Aminoethylethanolamine 15 DEA Diethanolamine TEA Triethanolamine DETA Diethylenetriamine All values for products are percentages based upon the converted monoethanolamine.
TAkr.~ ~
4 ~ 4- 17 .70 0 45 2~ 5 5 10 3 12 AlP~4-31a'~ SO O 40 30 ~ 3 lQ 4 11 6 ~1~4~ 3.0 10 3S 20 ~ 4 4 4 13 C~34 S 3D 10 0 10 ~5 Cl 10 25 & f~ 5 10 ~0 10 l~i 10 0 15 3t:~
9 FeA~UC 3~ 0 4~ 30 4 5 6 ~ g ~11 5 ;~!0 ;113 ~0 5 S 10 0 :L0 lb ~ 5 ~0 10 11:110 15 S 5 15 35 5 2~ ~0 5 Sl~ lC 5 ~3 Ç~34 3~ ~ 3S 3t3 3 4 10 4 14 J~ 3~ 5 10 2~ 20 ~ 5 0 10 30 c; ~3~L 5 ~ ~13 10 ~ 10 ~0 lQ~i3t~ ~ 3~ 20 5 ;20 10 5 ~0 ~ - ~e~per~tusc 3 5 0 - C
b. Nitr~ te 20 ~lJm~ n .
c. ~~pt~a~re 400~C-Att~nt~un ~ dl~ected ~0 ~e ~:O-p~
~0 a~plic~ S,r ~cu~ ~ olgon an~ sSe~en ~ ~1$~, O~
*;r~ aat~ ~re~,t;h ~C~di~ri p~tent appl~. Ser. N~. 58~, ~74-0 which ~eEcri~ an~ clal~ ~ 2roce~s fs: r the ~ehyd~tion a ,~ -hy~roxya~ ne *o the corresponding az ~ ridine, e~pe~i~lly ~nce~anol~mi~ to ethyleniDl~ne~ ~he 2~ c~t~lys~ u~ is ~ 13o~e~lar S~e~re, ~hich is loaded with ~ra a~ali Qr al~ lne e~a~n~ -~14 ~i43 NON-ZEOLITIC MOLECULAR SIEVES 13~717 The term "non-zeolitic molecular sieves" or "NZMS" is defined in the instant invention to include the "SAPO" molecular sieves of U.S. Patent No. 4,440,871, "ELAPSO" molecular sieves as disclosed in U.S. Patent No. 4,793,984 and certain "AlPO4", "MeAPO", "FeAPO", "TAPO" and "ELAPO"
molecular sieves, as hereinafter described.
Crystalline "AlPO4" aluminophosphates are disclosed in U.S. Patent No. 4,310,440 issued January 12, 1982; crystalline metal aluminophosphates (MeAPOs where ~Me~ is at least one of Mg, Mn, Co and Zn) are disclosed in U.S. Patent No. 4,567,029, issued January 28, 1986; crystalline ferroaluminophosphates (FeAPOs) are disclosed in U.S. Patent No. 4,554,143, issued November 19, 1985; titanium aluminophosphates (TAPOs) are disclosed in U.S. Patent No. 4,500,651, issued February 19, 1985; certain non-zeolitic molecular sieves ("ELAPO") are disclosed in EPC
Patent Application 85104386.9 (Publication No.
0158976, published October 13, 1985) and 85104388.5 (Publication No. 158349, published October 16, 1985); and ELAPSO molecular sieves are disclosed in U.S. Patent No. 4,793,984 (EPC Publication No.
0159624, published October 30, 1985).
The nomenclature employed herein to refer to the members of the aforementioned NZMSs is consistent with that employed in the aforementioned applications or patents. A particular member of a class is generally referred to as a "-n" species wherein "n" is an integer, e.g., SAPO-ll, MeAPO-ll and ELAPSO-31. In the following discussion on NZMSs set forth hereinafter the mole fraction of the NZMSs are defined as compositional values which are plotted in phase diagrams in each of the identified patents, published applications or copending applications.
ELAPSO MOLECULAR SIEVES
~ 'ELAPSO" molecular sieves are described in U.S. Patent No. 4,793,984 as crystalline molecular sieves having three-dimensional microporous framework structures of ELO2, A102, PO2, SiO2 oxide units and having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ELWAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwAlxPySiz)02 and has a value of from zero to about 0.3; "EL" represents at least one element capable of forming a three dimensional oxide framework, "EL" being characterized as an element having a mean "T-O" distance in tetrahedral oxide structures between about 1.51 Angstroms and about 2.06 Angstroms, "EL" having a cation electronegativity between about 125 kcal/g-atom to about 310 kcal/gm-atom and "EL" being capable of forming stable M-O-P, M-O-Al or M-O-M bonds in crystalline three dimensional oxide structures having a "M-O" bond dissociation energy greater than about 59 kcal/g-atom at 298-K; and "w", "x", "y" and "z" represent the mole fractions of "EL", aluminum, phosphorus and silicon, respectively, present as framework oxides, said mole fractions being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.39-(O.Ol)p O.Ol(p + 1) B 0.39-(O.Olp) 0.60 O.Ol(p + 1) C 0.01 0.60 0039 D 0.01 0.01 0.98 E 0.60 0.01 0.39 where "p" is an integer corresponding to the number of elements "El" in the (ElwAlxPySiz)02 constituent.
The "ELAPSO" molecular sieves are also described as crystalline molecular sieves having three-dimensional microporous framework structures of EL02, A102, SiO2 and P02 tetrahedral oxide units and having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ELWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwAlxPySiz)02 and has a value of from zero to about 0.3; "EL" represents at least one element capable of forming a framework tetrahedral oxide and is selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc; and ~'w", "x", "y" and "z" represent the mole fractions of "EL", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, said mole fractions being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.60 0.39-(O.Ol)p O.Ol(p + 1) b 0.39-(O.Olp) 0.60 O.Ol(p + 1) c 0.10 0.55 0.35 d 0.55 0.10 0.35 where "p" is as above defined.
The "ELAPSO" molecular sieves include numerous species which are intended herein to be within the scope of the term "non-zeolitic molecular sieves" such being disclosed in the following commonly ,., ~ .~-, assigned patents or applications, [(A) following a serial number indicates that the application is abandoned and (C) indicates that the application is a continuation of the immediately preceding patent or application]:
13~6717 U.S. Patent/Serial No. Filed NZMS
4,737,353 March 20, 1986 BeAPSO
4,738,837 April 15, 1986 CAPSO
4,735,806 March 31, 1986 GaAPSO
4,992,250 April 15, 1986 GeAPSO
4,684,617 April 13, 1984 TiAPSO
4,801,309(C) May 13, 1987 TiAPSO
4,758,419 April 13, 1984 MgAPSO
4,686,092 April 13, 1984 MnAPSO
4,744,970 April 13, 1984 CoAPSO
Can. Pat. No. 1248079 ZnAPSO
4,683,217 April 13, 1984 FeAPSO
Can. Pat. No. 1248080 QuinAPSO
4,956,164(C) June 22, 1987 QuinAPSO
4,741,892 April 13, 1984 QuinAPSO
~ , .
TiAPSO MOLECULAR SIEVES 1 3 3 6 717 The TiAPSO molecular sieves of U.S. Patent No. 4,684,617 and U.S. Patent No. 4,801,309 have three-dimensional microporous framework structures of TiO2, AlO2 ~, PO2+ and SiO2 tetrahedral oxide units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (TiWAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of ~R~' present per mole of (TiwAlxPySiz)O2 and has a value from zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 ~' In a subclass of TiAPSo molecular sieves the values "w", "x", "y" and~"z" in the above formula are within the tetragonal compositional area defined by points a, b, c and d, said points a, b, c and d representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y rz + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c o.lO 0.55 0.35 d 0.55 0.10 0.35 TiAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing active sources of titanium, silicon, aluminum and phosphorus, and preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50 C and 250 C, and preferably between lOO-C and 200-C until crystals of the TiAPSo product are obtained, usually a period of from hours to several weeks. Generally, the - 1~36717 . -33-crystallization time is from about 2 hours to about 30 days and typically from about 4 hours to about'20 days.
The product is recovered by any convenient method such - as centrifugation or filtration.
S In synthesizing the TiAPSos, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (TiwAlxPySiz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w~, "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxides are prepared as follows:
Preparative Reagents MgAPSO compositions are prepared using numerous reagents. Typical reagents which may be employed to prepare MgAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) H3PO4: 85 weight percent aqueous phosphoric acid in water;
(d) Tiipro: titanium isopropoxide;
~ ~,.
-3s- 133 6717 (e) TEAOH: 40 weight percent aqueous ~
solution of tetraethyla~monium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3NH: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N);
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H); and (j) C-hex: cyclohexylamine.
Preparative Procedures TiAPSOs may be prepared by forming a starting reaction mixture by adding the H3PO4 and the water.
This mixture is mixed and to this mixture aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the LUDOX-LS is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed.
The titanium isopropoxide is added to the above mixture and the resulting mixture blended until a homogeneous mixture is observed. The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. When the organic templating agent is quinuclidine the procedure is modified such that the quinuclidine is dissolved in about one half the water and accordingly the H3PO4 is mixed with about one half the water. (The pH of the mixture is measured and adjusted for temperature). The mixture is then placed in a lined (polytetrafluoroethylene) lined stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
The products are removed from the reaction vessel and cooled.
MqAPSO MOLECULAR SIEVES
The MgAPSO molecular sieves of U.S. Patent No. 4,758,419 have three-dimensional microporous framework structures of MgO22-, AlO2-, PO2+ and SiO2 tetrahedral oxide units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MgwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MgwAlxPySiz)O2 and has a value from zero (0) to about 0.3; and ~w~, "x", "y" and "z" represent the mole fractions of magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and _37_ 1336717 each preferably has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows: .
Mole Fraction Point x y (z + w~
A 0.60 0.38 0.02 B 0.39 0.59 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the MgAPSO
molecular sieves the values "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 MgAPSO compositions are generally synthesized by hydrothermal crystallization for an effective time at effective pressures and temperatures from a reaction mixture containing reactive sources of magnesium, silicon, aluminum and phosphorus, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of~the Periodic Table, and may be an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between lOO-C and 200-C until crystals of the MgAPSO product are obtained, usually a period of from several hours to several weeks. Generally, the crystallization period will be from about 2 hours to about 30 days with it typically being from about 4 hours to about 20 days for obtaining MgAPSO crystals. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MgAPS0 compositions, it is preferred to employ reaction mixture compositions expressed in terms of the molar ratios as follows:
aR : (MgWAlxpySiz)O2 : bH20 wherein "R" is an organic templating agent; "a" is thè
amount of organic templating agent "R" and can have a value within the range of from zero (0) to about 6 and is more preferably an effective amount greater than zero to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of ~39~ 133 6717 magnesium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction co~osition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxides are prepared as follows:
PreDarative Rea~ents MgAPSO compositions are prepared using numerous reagents. Typical reagents which may be employed to prepare MgAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea for hydrated pseudoboehmite;
_40_ 1336717 (c) LUDOX-LS: Trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(d) Mg(Ac)2: magnesium acetate tetrahydrate, Mg(C2H3O2).4H2O;
(e) H3PO4: 85 weight percent aqueous phosphoric acid in water;
(f) TBAOH: tetrabutylammonium hydroxide (40 wt. % in water);
(g) Pr2NH: di-n-propylamine;
(h) Pr3NH: tri-n-propylamine;
(i) Quin: Quinuclidine;
(j) MQuin: Methyl Quinuclidine hydroxide, (17.9% in water);
(k) C-hex: cyclohexylamine;
(1) TEAOH: tetraethylammonium hydroxide (40 wt. % in water);
(m) DEEA: Diethylethanolamine;
(n) i-Pr2NH: di-isopropylamine;
(o) TEABr: tetraethylammonium bromide; and (p) TPAOH: tetrapropylammonium hydroxide (40 wt. % in water).
Preparative Procedures The MgAPSO compositions may be prepared by preparing reaction mixtures having a molar composition expressed as:
eR fMg hAl23 iP2os gsio2 jH2o wherein e, f, g, h, i and j represent the moles of template R, magnesium (expressed as the oxide), SiO2, Al203, P205 (H3PO4 expressed as P205) and H20, respectively.
The reaction mixtures may be prepared by the following representative procedures, designated hereinafter as Methods A, B and C.
Method A
The reaction mixture is prepared by mixing the ground aluminum source (Alipro or CATAPAL) with the H3PO4 and water on a gradual basis with occasional cooling with an ice bath. The resulting mixture is blended until a homogeneous mixture is observed. When the aluminum source is CATAPAL the water and H3PO4 are first mixed with the CATAPAL added thereto. The magnesium acetate is dissolved in a portion of the water and is then added followed by addition of the LUDOX-LS.
The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended until a homogeneous mixture is observed. The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoro-ethylene) stainless steel prèssure vessel and digested at a temperature (150-C or 200-C) for an effective time.
Alternatively, if the digestion temperature is 100-C the final reaction mixture is placed in a lined (polytetrafluoroethylene) screw top bottle for a time.
Digestions aré typically carried out under autogenous pressure. The products are removed from the reaction vessel, cooled and evaluated as set forth hereinafter.
Method B
When method B is employed the organic templating agent is di-n-propylamine. The aluminum source, silicon source and one-half of the water are first mixed and blended until a homogeneous mixture is observed. A second solution was prepared by mixing the remaining water, the H3PO4 and the magnesium acetate.
This solution is then added to the above mixture. The magnesium acetate and H3PO4 solution is then added to the above mixture and blended until a homogeneous mixture is observed. The organic templating agent(s) is/are then added and the resulting reaction mixture digested and product recovered as in Method A.
Method C
Method C is carried out by mixing aluminum isopropoxide, LUDOX LS and water in a blender or by mixing water and aluminum iso-propoxide in a blender 1 3~6717 followed by addition of the LUDOX LS. ~3P~4 and magnesium acetate are then added to the resulting mixture. The organic templating agent is then added to the resulting mixture and digested and product recovered as in Method A.
MnAPSO MOLECULAR SIEVES
The MnAPSO molecular sieves of U.S. Patent No. 4,686,092 have a framework structures of MnO2 -2, AlO2 -, PO2 + and SiO2 tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MnwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~' present per mole of (MnwAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of the elements manganese, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined, as being within the limiting compositional values or points as follows:
~ A
~44~ 1336717 Mole Fraction Point x ` y ~ ~ (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 s C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 The values of w, x, y and z may be as follows:
Mole Fraction 10 Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 MnAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of manganese, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C and about 250 C, and preferably - 13~6717 between about lOO-C and about 200-C until crystals of the MnAPSO product are obtai~ed, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MnA~SO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MnwAlxpysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of manganese, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 13~ 6717 Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w~, "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents MnAPSO compositions may be prepared using numerous reagents. Reagents which may be employed to prepare MnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
. ~
_47_ 1 3 3 6 71 7 (d) H3PO4: 85-weight percent aqueous phosphoric acid:
(e) MnAc: Manganese acetate, Mn(c2H3o2)2.4H2o;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide; and (o) DEEA: 2-diethylaminoethanol.
Preparative Procedures MnAPSOs are prepared by forming a starting reaction mixture by adding the H3PO4 to one half of the quantity of water. This mixture is mixed and to this mixture the aluminum isopropoxide or CATAPAL is added.
This mixture is then blended until a homogeneous mixture is observed. To this mixture the LUDOX LS is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed. A second mixture is prepared using the manganese acetate and the remainder (about 50%) Of the water. The two mixtures are admixed and the resulting mixture blended until a homogeneous mixture is observed.
The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. (The pH of the mixture is measured and adjusted for temperature). The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out at the autogenous pressure.
CoAPSO MOLECULAR SIEVES
The CoAPSO molecular sieves of U.S. Patent No. 4,744,970 have three-dimensional microporous framework structures of CoO2 -2, AlO2 ~, PO2 + and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (cowAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~R~' present per mole of (CowAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminu~, phosphorus and silicon, respectively, present as tetrahedral oxides, where the mole fractions "w", "x", "y" and "z" are each at least 0.01 and are generally defined, as being within the limiting compositional values or points as follows:
. Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CoAPSO
molecular sieves the values of "w", "x", "y", and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10. 0.35 CoAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of cobalt, silicon, aluminum ~ and phosphorus, an organic templating, i.e., structure-- directing, agent, preferably~a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at an effective temperature which is generally between 50-C
and 250-C and preferably between 100~C and 200C until crystals of the CoAPSO product are obtained, usually for an effective time of from several hours to several weeks. Generally the effective crystallization time will be from about 2 hours to about 30 days and typically from about 4 hours to about 20 days. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CoAPSOs, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CowAlxPysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and 300; and "w", "x", "y"
- ~ -51- 1336717 and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01. In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and ~Zll are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point x y fz + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents CoAPSO compositions may be prepared using numerous reagents. Reagents which may be employed to prepared CoAPSOs include:
(a) Alipro: aluminum isopropoxide;
3367l7 : -52-(b) CATAPAL: Tradema~rk of Condea Corporation for pseudoboehmite; t (c) LUDOX-LS: Trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(d) Co(Ac)2: cobalt acetate, Co(C2H3O2)2 4H2 (e) CoSO4: cobalt sulfate, (CoSO4.7H2O);
(f) H3PO4: 85 weight percent phosphoric acid in water;
(g) TBAOH: tetrabutylammonium hydroxide (25 wt % in methanol);
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(l) C-hex: cyclohexylamine;
(m) TEAOH: tetraethylammonium hydroxide (40 wt. % in water);
(n) DEEA: diethanolamine;
(o) TPAOH: tetrapropylammonium hydroxide (40 wt. % in water); and (p) TMAOH: tetramethylammonium hydroxide (40 wt. % in water).
~53~ 133 6717 PreParative-Procedure CoAPSO compositio~s may be prepared by preparing reaction mixtures having a molar composition expressed as:
eR:fCOo:hAl2o3:ip2os gsio2 jH2o wherein e, f, h, i, g and j represent the moles of template R, cobalt (expressed as the oxide), Al203, P205 (H3PO4 expressed as P205), sio2 and H2O, respectively.
The reaction mixtures are prepared by forming a starting reaction mixture comprising the H3P04 and one half of the water. This mixture is stirred and the aluminum source (Alipro or CATAPAL) added. The resulting mixture is blended until a homogeneous mixture is observed. The LUDOX-LS is then added to the resulting mixture and the new mixture blended until a homogeneous mixture is observed. The cobalt source (e.g., Co(Ac)2, Co(S04) or mixtures thereof) is dissolved in the remaining water and combined with the first mixture. The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended for about two to four minutes until a homogeneous mixture is observed.
The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C, 200-C or 225-C) for a time. Digestions are typically carried out at the autogenous pressure. The products are removed from the reaction vessel and cooled.
ZnAPSO MOLECULAR SIEVES
The ZnAPSO molecular sieves of Canadian Patent No. 1248079 comprise framework structures of Zn2 -2, AlO2 -, PO2 + and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (ZnwAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of "R~' present per mole of (ZnwAlxPySiz)O2 and has a value of zero to about 0.3; and "w", "x", "y" and "z"
represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "w", "x", "y" and "z" are generally defined being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 -.
_55_- 1336717 .
In a preferred subcIass of ZnAPSO molecular sieves the values "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x - y (z + w) a 0.55 0.43 0.02 b 0.43 0.55 0.02 c 0.10 0.55 0.3S
d O.S5 0.10 0.35 ZnAPSO compositions are generally synthesized by hydrothermal crystallization at effective process conditions from a reaction mixture containing active sources of zinc, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element or Group VA of the Periodic Table, and/or optionally an alkali of other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure, at a temperature between 50C and 250-C, and preferably between lOO-C and 200-C until crystals of the ZnAPS0 product are obtained, usually a period of from several hours to several weeks.
Generally the effective crystallization period is from : 56- 1336717 about 2 hours to about 30 days with typical periods of from about 4 hours to about 20 days being employed to obtain ZnAPS0 products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the ZnAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (ZnwAlxPysiz)2 bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, more preferably between about 2 and about 300; and "w", "x", "y" and "z" represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01. In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing zinc, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents ZnAPSO compositions are typically prepared using numerous reagents. Reagents which may be employed to prepare ZnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
` 1336717 (d) H3PO4: 85 weight percent aqueous phosphoric acid;
(e) -ZnAc: Zinc Acetate, Zn(C2H3O2)2.4H2O;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide: -(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) TMAOH: Tetramethylammonium hydroxide pentahydrate, (CH3)4NOH.5H2O;
(i) TPAOH: 40 weight percent aqueous solution of tetrapropylammonium hydroxide, (C3H7)4NOH;
(j) Pr2NH: di-n-propylamine, (C3H7)2NH;
(k) Pr3N: Tri-n-propylamine, (C3H7)3N;
(1) Quin: Quinuclidine, (C7H13N);
(m) C-hex: cyclohexylamine; and (n) DEEA: diethylethanolamine, ( C2H5 ) 2NC2H50H .
Pre~arative Procedure ZnAPSO compositions are typically prepared by forming reaction mixtures having a molar composition expressed as:
eR:fzno:gAl2o3 hp2os isio2 jH2o wherein e, f, g, h, i and j represent the moles of template R, zinc (expressed as the oxide), Al2O3, P2O5 (H3PO4 expressed as P2O5), SiO2 and H2O, respectively.
The reaction mixtures are generally prepared by forming a starting reaction mixture comprising the H3PO4 and a portion of the water.
This mixture is stirred and the aluminum source added. The resulting mixture is blended until a homogeneous mixture is observed. The LUDOX LS is then added to the resulting mixture and the new mixture blended until a homogeneous mixture is observed. The zinc source (zinc acetate) is dissolved in the remaining water and combined with the first mixture. The combined mixture is blended until a homogeneous mixture is observed. The organic templating agent is added to this mixture and blended for about two to four minutes until a homogeneous mixture is observed. The resulting mixture (final reaction mixture) is placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at an effective temperature for an effective time. Digestions are typically carried out under autogenous pressure.
The products are removed from the reaction vessel and cooled.
FeAPSO MOLECULAR SIEVES
The FeAPSO molecular sieves of U.S. Patent No. 4,683,217 have three-dimensional microporous crystal framework structures of FeO2-2, (and/or FeO2~), A102 ~, PO2 + and SiO2 tetrahedral units, and having a unit empirical formula, on an anhydrous basis, of:
~, w x y iZ)02 ~ wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (FewAlxPySiz)O2 and has a value of from zero (0) to about 0.3; the maximum value of "m" in each case depends upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular molecular sieve involved; and "w", "x", "y"
and "z" represent the mole fractions of iron, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, said mole fractions being such that they are within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 `~ -61- 1336717 - The values of w, x, y and z may be as follows:~-- -Mole Fraction Point x y (z + w) a 0.55 0.43 0.02 $ b 0.43 0.55 0.02 c 0.10 0.55 0.35 d 0.55 0.10 0.35 The FeAPSOs of the instant invention are generally synthesized by hydrothermal crystallization from a reaction mixture comprising reactive sources of iron, aluminum, phosphorus and silicon, and preferably one or more organic templating agents. Optionally, alkali or other metal(s) may be present in the reaction mixture and may act as templating agents. The reaction mixture is generally placed in a pressure vessel, preferably lined with an inert plastic material, such as polytetrafluoroethylene, and heated, preferably under autogenous pressure, at an effective temperature which is generally between about 50-C and about 2S0-C, and preferably between about 100-C and 200-C, until crystals of the FeAPSO product are obtained, usually a period of from several hours to several weeks. Molecular sieves containing iron, aluminum, phosphorus and silicon as framework tetrahedral oxide units are typically prepared as follows:
- Preparative Reagents ~- -- FeAPSO compositions may be prepared using numerous reagents. Reagents which may employed to prepare FeAPSOs include: .
(a) Alipro: aluminum isopropoxide, Al(ocH(cH3)2)3;
(b) LUDOX-LS: LUDOX-LS is the trademark of Du Pont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na2O;
(c) CATAPAL: trademark for hydrated aluminum oxide containing about 75 wt. percent A12O3 (pseudoboehmite phase~ and about 25 wt. percent water;
(d) Fe(Ac)2: Iron (II) acetate;
(e) FeSO4: Iron (II) sulfate hexahydrate;
(f) H3PO4: 8S weight percent phosphoric acid in water;
(g) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(h) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(i) Pr2NH: di-n-propylamine ((C3H7)2NH);
(j) Pr3N: tri-n-propylamine ((C3H7)3N);
(k) Quin: Quinuclidine (C7H13N);
(1) MQuin: Methyl Quinuclidine hydroxide (C7H13NCH3OH);
(m) TMAOH: tetramethylammonium hydroxide ~pentahydrate; and (o) C-hex: cyclohexylamine.
Preparative Procedures a) Reaction mixtures to prepare FeAPSOs are typically prepared by grinding an aluminum isopropoxide in a blender followed by slowly adding a H3PO4 solution with mixing. A solution/dispersion of iron acetate in water is added and then a silica (e.g., LUDOX-LS) is added. The organic templating agent is then added to this mixture, or in some cases one-half of this mixture, and the mixture blended to form a homogeneous mixture.
For example, in one embodiment, the number of moles of each component in the reaction mixture is as follows:
15Com~onent Moles P205 0 . 9 sio2 0.2 FeO* 0.2 20 TEAOH 1.0 * Iron (II) acetate reported as Iron (II) oxide.
The reaction mixture is sealed in a stainless steel pressure vessel lined with polytetrafluoroethylene and heated in an oven at a temperature, time and under autogenous pressure. The solid reaction product is -64- 13~6717 recovered by filtration, washed with water and dried at room temperature.
b) In another embodiment, reaction mixtures are prepared by grinding the aluminum isopropoxide in a blender followed by addition of a solution/dispersion of iron(II) acetate. H3PO4 is added to this mixture and the resulting-mixture blended to form a homogeneous mixture. A silica (e.g., LUDOX-LS) is added to this mixture except that in some instances the silica may be added with the H3PO4. The resulting mixtures were blended until a homogeneous mixture is observed.
Organic templating agent is added to each mixture and the resulting mixtures placed in a stainless steel pressure vessel lined with polytetrafluoroethylene and heated, washed and the product recovered. In this embodiment the number of moles of each component in the reaction mixture is as follows:
Com~onent Moles A123 . 9 SiO2 0.2 FeO* 0.2 Template 1.0 * Iron(II) acetate reported as Iron(II) oxide.
The QuinAPSO quinary molecular sieves of Canadian Patent No. 1248080 and U.S. Patent No.
4,741,892 have three-dimensional microporous framework structures of MO2n, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~R~
present per mole of (MwAlxPySiz)O2 and has a value of from zero (0) to about 0.3; M represents at least two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", ~x", ~y~ and ~'z~ represent the mole fractions of M, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Preferably, M
represents the combination of cobalt and manganese.
The mole fractions "w", "x", "y", and "z" are generally defined as being within the limiting compositional values or points as follows:
. . , Mole Fraction Point x ~ y (z + w) A - 0.60 - 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 Preferably the mole fractions w, x, y and z will fall within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) a 0.60 0.37 0.03 b 0.37 0.60 0.03 15 .c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0-.01 0.39 QuinAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements M, aluminum, phosphorus and silicon and preferably an organic templating agent, i.e., structure-directing, agent. The structure-directing agents are preferably a compound of an element of Group VA of the Periodic Table, and may be an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure and at typical effective temperatures between 50-C and 250DC, preferably between 100C and 200-C, until crystals of the QuinAPS0 product are obtained, usually over a period of-from several hours to several weeks. Typical effective crystallization times are from about 2 hours to 30 days with from about 4 hours to about 20 days being generally employed to obtain QuinAPS0 products.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the QuinAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MwAlxpysiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y", and "z" represent the mole fractions of elements M, 2S aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions'"w", 'ix", "y"
and 'oz" are generally defined as being within tee limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.37 0.03 G 0.37 0.60 0.03 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of ~w,~x~ y~ and "z" such that (w + x + y + z) = 1.00 mole. QuinAPSO
compositions were prepared using numerous regents;
the appropriate sources of the various elements M
are the same as those used in the preparation of the various APO and APSO molecular sieves containing the same elementsl as described in detail above and below.
Reagents which may be employed to prepare QuinApSOs include:
(a) Alipro: aluminum isopropoxide, (b) LUDOXLS: LUDOX-LS is the trademark name of DuPont for an aqeuous solution of 30 t ~ ~
.,~
weight percent SiO2 and 0.1 weight percent Na20;~
(c) H3PO4: 85 weight percent phosphoric acid;
(d) MnAc: Manganese acetate, Mn(C2H302)2.4H20 (for QuinAPSOs containing manganese);
(e) CoAc: Cobalt Acetate, Co(C2H302)2.4H20 (for QuinAPSOs containing cobalt);
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide; and (g) Pr2NH: di-n-propylamine, (C3H7)2NH.
Pre~arative Procedures QuinAPSOs may be prepared by forming a starting reaction mixture by adding H3PO4 and one half of the quantity of water. To this mixture an aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture a silica (e.g., LUDOX-LS) is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed. A second mixture is prepared using manganese acetate (or a appropriate source of another element M) and one half of the remaining water. A third mixture is prepared using cobalt acetate (or a appropriate source of another element M) and one half of the remaining water. The three mixtures are admixed and the resulting mixture blended until a homogeneous mixture is obsle~v~.717 The organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i . e., about 2 to 4 minutes. The pH of the mixture is measured and adjusted for temperature. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at an effective temperature for an effective time.
Digestions are typically carried out under autogenous pressure.
CoMnMqAPSO MOLECULAR SIEVES
The CoMnMgAPSO senary molecular sieves have three-dimensional microporous framework structures f C2 2, MnO2~2, Mgo2 2, A102, PO2 and SiO2 tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (CotMnuMgvAlxPysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~
present per mole of (CotMnuMgvAlxPySiz)02 and has a value of from zero (0) to about 0.3; "t", "u", and "v", "x", "y" and "z" represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01. The mole fractions "t", "u", "v", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CoMnMgAPSO
molecular sieves the values of "w", "x", "y" and "z" in lS the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point x y ~z + w) a 0.55 0.41 0.04 b 0.41 0.55 0.04 c 0.10 0.55 0.35 d 0.55 0.10 0.35 ~ CoMnMgAPS0 compositions are generally synthesized by hydrothermal~crystallization from a reaction mixture containing reactive sources of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, and preferably an organic templating agent, i.e., structure-directing, agent. The structure-directing agents are prçferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between lOO-C and 200-C, until crystals of the CoMnMgAPSO product are obtained, usually over a period of from several hours to several weeks. Typical crystallization times are from about 2 hours to about 30 days with from about 4 hours to about 20 days generally being employed to obtain CoMnMgAPSO products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CoMnMgAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (COtMnuMgvAlxpysiz)o2 2 ~73~ 1336717 wherein "R" is an organic templating agent; "a" is the amount of organic templating~agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to 5 about 6 and more preferably from greater than zero to about 2; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "t", "u", "v", "x", "y", and n Z 1~ represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and 10 silicon, respectively, and each has a value of at least 0.01.
In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z", where "w" is the sum of "t" + "u" + "v", are 15 generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) F 0.60 0.36 0.04 G 0.36 0.60 0.04 H 0.01 0060 0.39 - I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction 25 composition, the reactants are normalized with respect to the total of "t", "u", "v", "x", "y" and "z" such that (t + u + v + x + y + z) = 1.00 mole. Molecular sieves containing cobalt, manganese, magnesium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents CoMnMgAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare CoMnAPSO include:
(a) Alipro: aluminum isopropoxide;
~b) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an agueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(c) H3PO4: aqueous solution which is 85 weight percent phosphoric acid;
(d) MnAc: Manganese acetate, Mn(C2H302)2-4H20;
(e) CoAc: Cobalt Acetate, Co(C2H302)2-4H20;
(f) MgAc: Magnesium Acetate Mg(C2H302)-4H20;
(g) TEAOH: 40 weight percent agueous solution of tetraethylammonium hydroxide; and (h) Pr2NH: di-n-propylamine, (C3H7)2NH.
Preparative Procedures CoMnMgAPSOs may be prepared by forming a starting reaction mixture by adding H3PO4 and one half of the quantity of water. To this mixture analuminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture a silica (e.g., LUDOX-LS) is added and the resulting mixture blended (about 2 minutes) until a homogeneous mixture is observed.
Three additional mixtures are prepared using cobalt acetate, magnesium acetate and manganese acetate using one third of the remainder of the water for each mixture. The four mixtures are then admixed and the resulting mixture blended until a homogeneous mixture is observed. An organic templating agent is then added to the resulting mixture and the resulting mixture blended until a homogeneous mixture is observed, i.e., about 2 to 4 minutes. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature for a time.
Digestions are typically carried out under autogenous pressure.
SenAPSO MOLECULAR SIEVES
The SenAPSO molecular sieves have three-dimensional microporous framework structures of Mo2n, A102-, PO2+ and SiO2 tetrahedral oxide units, where "n" is -3, -2, -1, 0 or +1, and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MWAlxpysiz)o2 ~' .~
.76-wherein "R" represents at least one organic templating agent present in the intracrystalline~pore system; "m"
represents the molar amount of "R" present per mole of (MwAlxPySiz)02r and has a value of from zero to about 0.3; "M" represents three elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; "n" may have the aforementioned values depending upon the oxidation state of "M"; and "w", "x", "y" and "z" represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides.
The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows, wherein "w" denotes the combined mole fractions of the three elements "M" such that "w" = "wl" + "w2" + "w3'l and each element "M" has a mole fraction of at least 0.01:
Mole Fraction 20 Point x y (z + w) A 0.60 0.36 0,04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0c98 E 0.60 OoOl 0u39 _-77_ 1336717 In a preferred subclass of the SenAPSO
molecular sieves the values of "w", "x", "y" and "z" in the above formula are within the limiting compositional values or points as follows:
Mole Fraction Point ` x y (z + w) a 0.60 0.36 0.04 -b 0.36 0.60 0.04 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 SenAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture lS containing reactive sources of elements "M", aluminum, phosphorus and silicon, and preferably an organic templating, i.e., structure-directing, agent. The structure-directing agents are preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50 C and 250-C, and preferably between lOO-C and 200-C, until crystals of the SenAPSO product are obtained, usually ~ 78-over a period of from several hours to several weeks.
Typical crystallization time~s are from about 2 hours to about 30 days with from about 4 hours to about 20 days generally being employed to obtain SenAPS0 products.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the SenAPSO compositions, it is preferred to~employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MwAlxPySiz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6 and more preferably from greater than zero to about 2; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300; and "w", "x", "y", and "z" represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01, with the proviso that each "M" is present in a mole fraction of at least 0.01.
In a preferred embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y"
and "z" are generally defined as being within the limiting compositional values or points as follows:
_79 1336717 Mole Fraction Point x ` y (z + w~
F 0.60 0.36 0.04 G 0.36 0.60 0.04 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x +
y + z) = 1.00 mole. The SenAPSO molecular sieves are prepared by preparative techniques, and using sources of the elements "M" similar to those described for the other APSO molecular sieves described above and below.
. AsAPSO MOLECULAR SIEVES
The AsAPSO molecular sieves of U.S. Serial No.
599,808, filed April 13, 1984, and U.S. Serial No.
845,484 filed March 31, 1986 have a framework structure of AsO2n, AlO2 , PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (AswAlxPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (AswAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than o.i5; and "w", "x", "y" and "z" represent the mole fractions of the elements arsenic, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the AsAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 - -81~ 67 17 In an especially preferred su~class of the AsAPSO molecular sieves, the~values of w, x, y and z are as follows:
- Mole Fraction 5 Point x ~ (z + w) g 0.50 0.40 0.10 h 0.42 0.48 0.10 i 0.38 0.48 0.14 j 0.38 0.37 0.25 k 0.45 0.30 0.25 1 0.50 0.30 0.20 AsAPS0 compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of arsenic, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the AsAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective .-82 ~ times of from 2 hours to about 30 days, generally from ~ about 12 hours to about 10 d~ays, have been observed.
The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the AsAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (AswAlxPySiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 60; and "w", "x", "y"
and "z" represent the mole fractions of arsenic, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x ~ y ~ (z + w) F 0.60 0.38 . 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especialiy preferred reaction mixtures are those containing from about 1 to about 2 total moles of silicon and arsenic, and from about 1 to about 2 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of-"w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing arsenic, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents AsAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare AsAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) As205, arsenic(V) oxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures AsAPSOs may be prepared by forming a starting reaction mixture by dissolving the arsenic(V) oxide and the H3PO4 in at least part of the water. To this ~, ",, ~, -8S- 1~36717 solution the aluminum isopropoxide or CATAPAL is added. This mixture is then blended until a homogeneous mixture is Observed. To this mixture the templating agent and then the silica is added and the resulting mixture blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoro-ethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
BAPSO MOLECULAR SIEVES
The BAPSO molecular sieves have a framework structure of BO2-, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
Mr : (BWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of ~'R"
present per mole of (BwAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements boron, aluminum, phosphorus and silicon, respectively, ~ -86- 1336717 present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 5 Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the BAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e - 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the BAPSO molecular sieves, the values of w, x, y and z are as follows:
- - - Mole Fraction Point x ~ y (z +-w) g 0.51 0.42 0.07 h 0.45 0.48 0.07 i 0.33 0.48 0.19 j 0.33 0.38 0.29 k 0.36 0.35 0.29 1 0.51 0.35 0.14 BAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of boron, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
20 and about 250-C, and preferably between about 100C and about 200-C until crystals of the BAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration. ~ -In synthesizing the BAPS0 compositions, it ispreferred to employ a reaction mixture composition S expressed in terms of the molar ratios as follows:
w x y z) 2 2 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "w", "x", "y"
and "zf' represent the mole fractions of boron, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embo~ nt the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
~ Mole Fraction Point x ~ y (z + w) - F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especialiy preferred reaction mixtures are those containing from about 1.0 to about 2 total moles of silicon and boron, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing boron, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation Z5 for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) H3BO3, boric acid, and trialkyl borates;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures BAPSOs may be prepared by forming a starting reaction mixture by dissolving aluminum isopropoxide in an alcohol such as isopropanol, adding the H3PO4 and 9l 1336717 recovering the solid which precipitates. This solid is then added to water, and trialkylborate (for example trimethyi borate added, followed by silica and the templating agent. This mixture is then blended until a homogeneous mixture is observed.
The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
BeAPSO MOLECULAR SIEVES
The BeAPSO molecular sieves of U.S. Patent No. 4,737,353 have a framework structure of BeO2~2, AlO2-,AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (BewAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BewAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements beryllium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting~compos~itional values or points as~follows:
Mole Fraction 5 Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the BeAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction 15 Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 BeAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of beryllium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably -93_ 1336717 a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vesse}, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the BeAPSO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, have been observed, with from 1 to 10 days being preferred. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BeAPSO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (BewAlxpysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most -94~ 133 6~17 preferably not greater than about 20; and "w", "x", "y"
and "z" represent the mole fractions of ~eryllium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 10 Point x y ~z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing beryllium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BeAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BeAPSOs include:
(a) Alipro: aluminum isopropoxi~;3 6 71 7 (b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) beryllium sulfate, BeSO4;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) Mquin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEBA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures ¦ 3 3 6 717 BeAPsos may be prepared by forming a starting solution by mixing H3PO4 in at least part of-the water. To this solution is added beryllium sulfate (or another beryllium salt) and the resultant mixture stirred until a homogeneous solution is obtained. To this solution may be added successively the aluminum oxidel the silica and the templatingagent, with the mixture being stirred between each addition until it is homogeneous. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
CAPSO MOLECULAR SIEVES
The CAPSO molecular sieves of and U.S.
Patent No. 4,738,837 have a framework structure of CrO2n, A102-, PO2-, PO2+ and SiO2 tetrahedral units (where "n" is -1, 0 or +1) having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (crwAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
. .
~ represents the molar amount of "R" present per-mole of ~ (CrwAlxPySiz)02 and has a value of zero to ab~ut 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements S chromium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y rz + w~
A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 In a preferred subclass of the CAPS0 molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction 20 Point x y (z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the CAPS0 molecular sieves, the values of x and y in the above formula are each within the range of about 0.4 to 0.5 and (z + w) is in the range of about 0.02 to 0.15.
Since the exact nature of the CAPSO molecular sieves is not clearly understood at present, although all are believed to contain CrO2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the CAPS0 molec~lar sieves by means of their chemical composition.
This is due to the low level of chromium present in certain of the CAPSO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between chromium, aluminum, phosphorus and silicon. As a result, although it is believed that CrO2 tetrahedra are substituted isomorphously for A102, PO2 or SiO2 tetrahedra, it is appropriate to characterize certain CAPSO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
CAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of chromium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic ` _99_ 1 3 3 6717 Table, and/or optionally an alkali or other metal. The reaction mixture is generalLy placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the CAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CrwAlxPysiz )2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "w", "x", "y"
-loo- 1336717 and "z" represent the mole fractions of chromium, aluminum, phosphorus and silïcon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w~
F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.3 to about 0.5 total moles of silicon and chromium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", -y" and "z" such that (w + x + y + z) = l.00 mole. Molecular sieves containing chromium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
PreParative Reagents 13 3 6 717 CAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare MnAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4: 85 weight percent aqueous phosphoric acid;
(e) chromium acetate, and chromium acetate hydroxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
,, ~
(n) TPAOH: tetrapropylammonium hydroxide; and ~ (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
Preparative Procedures CAPSOs may be prepared by forming a starting solution by dissolving H3PO4 in at least part of the water. To this solution the aluminum isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the silica, the chromium acetate or chromium acetate hydroxide and the templating agent are successively added and at each step the resulting mixture is blended until a homogeneous mixture is observed.
Alternatively, the water and aluminum isopropoxide may first be mixed, and then the silica, the chromium acetate or chromium acetate hydroxide, the phosphoric acid and the templating agent added, and again at each step the resulting mixture is blended until a homogeneous mixture is observed.
In either case, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C or 200-C) for a time or placed in lined screw top bottles for digestion at 100-C. Digestions are typically carried out under autogenous pressure.
-103- 1 3~6717 GaAPSO MOLECULAR SIEVES
The GaAPSO molecular sieves of U.S. Patent No. 4,735,806 have a framework structure of GaO2-, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (GaWAlxpysiz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (GawAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.2; and "w", "x", "y" and "z" represent the mole fractions of the elements gallium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39 ..~. -, - In-a preferred subclass of the GaAPS0 molecular sieves, the values of w, x, y and z are a~
follows:
Mole Fraction `5 Point x y (z.+ w~
a 0.60 0.38 0.02 b 0.38 0.60 0.02 -c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 In an especially preferred subclass of the GaAPSO molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) g 0.45 0.40 0.15 h 0.33 0.52 0.15 i 0.20 0.52 0.28 j 0.20 0.45 0.35 k 0.36 0 29 0.35 1 0.45 0.29 0.26 GaAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of gallium, silicon, aluminum and phosphorus, preferably an organic templating, i~.e., structure-directing, agent, preferably a compound of an element of 6roup VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the GaAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 2 to about 15 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GaAPS0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GaWAlxPysiz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about 500, ~-14643 preferably between about 2 and about 300, most preferably not greater than ~about 20; and "w", "x"-, "y"
and "z" represent the mole fractions of gallium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y ~z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.5 to about 1.0 total moles of silicon and gallium, and from about 0.75 about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing gallium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents GaAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GaAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUOOX-lS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3P04 : 85 weight percent aqueous phosphoric acid;
(e) gallium hydroxide, or gallium sulfate;
(f) TFAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
. ~3 .
~ (m~~ TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrap~ropyl~ammonium hydroxide-; and (o) DEEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.
~ Preparative Procedures GaAPSOs may be prepared by forming a starting solution by dissolving the H3PO4 in at least part of the water. To this solution the aluminum hydroxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. -To this mixture is added a second solution prepared by adding silica to a solution containing the gallium hydroxide and the templating agent and then the combined mixture is blended until a homogeneous mixture is observed.
Alternatively, the templating agent may be added to the solution containing the phosphoric acid and water, and a solution of gallium sulfate in water added, followed by successive additions of silica and aluminum oxide and then the combined mixture is blended until a homogeneous mixture is observed.
In either case, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200-C) for a time or placed in lined screw top bottles lOg- 1336717 for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GeAPSO MOLECULAR SIEVES
The GeAPSO molecular sieves have a framework structure of GeO2, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (GewAlxpysiz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R~
present per mole of (GewAlxPySiz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "w", "x", "y" and "z" represent the mole fractions of the elements germanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- ` 1336717 - - ~ -- - Mole Fraction Point _ ~ y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 - 0.01 0.98 E 0.60 0.01 0.39 . In.a preferred subclass of the GeAPSO
molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y ~z + w) a 0.60 0.38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f 0.60 0.01 0.39 . In an especially preferred subclass of the GeAPSO molecular sieves, the values of w, x, y~and z are as follows:
- -- - Mole Fraction Point x ~ y (z + w) g 0.60 0.35 0.05 h 0.47 0.48 0.05 i 0.40 0.48 0.12 j 0.40 0.36 0.24 k 0.46 0.30 0.24 1 0.60 0.30 0.10 GeAPS0 compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of germanium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250C, and preferably between about lOO-C and about 200-C until crystals of the GeAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from 2s about 4 hours to about 20 days, and preferably about 12 hours to about 7 days have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GeAPSO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GewAlxPysiz)o2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20, and desirably not greater than about 10; and "w", "x", "y" and "z"
represent the mole fractions of germanium, aluminum, phosphorus and silicon, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point _ y (z + w) . F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 Especially preferred reaction mixtures are those containing from about 0.2 to about 0.3 total moles of silicon and germanium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = 1.00 mole. Molecular sieves containing germanium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents GeAPSO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GeAPSOs include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the-trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4 : 85 weight percent aqueous phosphoric acid;
(e) germanium tetrachloride or germanium ethoxide;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQquin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide;
and (o) DEBA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate;
(q) aluminum chlorhydrol.
'?
..~ ~, .
Preparative Procedures In some cases, it may ba advantageous, when syntheslzing the GeAPSO compositions, to flrst combine sources of germanium and aluminum, or of germanium, aluminum and silicon, to form a mixed germanium/aluminum or germanium/aluminum/silicon compound (this compound being typically a mixed oxide) and thereafter to combine this mixed compound with a source of phosphorus to form the final GeAPSO composition. Such mixed oxides may be prepared for example by hydrolyzing aqueous solutions containing germanium tetrachloride and aluminum chlorhydrol, or germanium ethoxide, tetraethylorthosilicate, and aluminum tri-sec-butoxide.
GeAPSOs may be prepared by forming a starting solution by dissolving the H3PO4 in at least part of the water. To this solution the aluminum isopropoxide or CATAPAL is added. This mixture is then blended until a - homogeneous mixture is observed. To this mixture the templating agent and then a solution containing tetraethylorthosilicate and germanium ethoxide, and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, the phosphoric acid may first be mixed with the templating agent, and then a solution containing tetraethylorthosilicate and germanium ethoxide combined with the phosphoric acid/templating agent solution. Then the aluminum' oxide is added and the resultant mixture blended until homogeneous.
In a third procedure, the phosphorlc acid may first be mixed with the templating agent and water, and to the resultant solution is added the solid aluminum/silicon/germanium mixed oxide prepared as described above. The resultant mixture is then blended until homogeneous.
Whichever procedure is adopted, the final mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
LiAPSO MOLECULAR SIEVES
The LiAPSO molecular sieves have a framework structure of Lio2-3, AlO2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (LiWAlxpysiz)o2 wherein ~'R" represents at least one organic templating agent present in the intracrystalline pore system; ~'m" represents the molar amount of ~R~' present per mole of .~, .
:-117-- 133~717 (LiwAlxPySiz)02 and has a value of-zero to about 0.3, but is preferably not greater than O.15; and "w", "x", ''y" and "z" represent the mole fractions of the elements lithium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. The mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0098 E 0.60 0.01 0.39 In a preferred subclass of the LiAPSo molecular sieves, the values of w, x, y and z are as follows:
Mole Fraction Point x y (z + w) a 0.60 0~38 0.02 b 0.38 0.60 0.02 c 0.01 0.60 0.39 d 0.01 0.39 0.60 e 0.39 0.01 0.60 f . 0.60 0.01 0.39 - In an especially preferred subclass of the LiAPSo molecular sieves, the value of WTZ is not greater than about 0.20.
Since the exact nature of the LiAPSo molecular S sieves is not clearly understood at present, although -all are believed to contain Lio2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the LiAPSo molecular sieves by means of their chemical composition.
This is due to the low level of lithium present in certain of the LiAPo molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between lithium, aluminum, phosphorus and silicon. As a result, although it is believed that Lio2 tetrahedra are substituted isomorphously for AlO2, PO2 or SiO2 tetrahedra, it is appropriate to characterize certain LiAPS0 compositions by reference to their chemical composition in terms of the mole ratios of oxides.
LiAPSO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of lithium, silicon, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The ~119-- -reaction mixture is generally placed in-a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250C, and preferably between about lOO-C and about 200-C until crystals of the LiAPS0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the LiAPSo compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (LiwAlxPySiz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20, and most desirably not greater than about 10; and "w", "x", "y" and "z"
~-120- 1336717 represent the mole fractions of lithium,-aluminum, phosphorus and silicon, respectively, and each has a value of at-least 0.01.
In one embodiment the reaction mixture is S selected such that the mole fractions "w", "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
- Mole Fraction Point x y (z + w) F 0.60 0.38 0.02 G 0.38 0.60 0.02 H 0.01 0.60 0.39 I 0.01 0.01 0.98 J 0.60 0.01 0.39 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "w", "x", "y" and "z" such that (w + x + y + z) = l.00 mole. Molecular sieves containing lithium, aluminum, phosphorus and silicon as framework tetrahedral oxide units are prepared as follows:
Preparative Rea~ents LiAPSo compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare LiAPSos include:
(a) Alipro: aluminum isopropoxide;
(b) CATAPAL: Trademark of Condea Corporation for hydrated pseudoboehmite;
(c) LUDOX-LS: LUDOX-LS is the trademark of DuPont for an aqueous solution of 30 weight percent SiO2 and 0.1 weight percent Na20;
(d) H3PO4: 85 weight percent aqueous phosphoric acidi (e) lithium orthophosphate;
(f) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(g) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(h) Pr2NH: di-n-propylamine, (C3H7)2NH;
(i) Pr3N: tri-n-propylamine, (C3H7)3N;
(j) Quin: Quinuclidine, (C7H13N);
(k) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(1) C-hex: cyclohexylamine;
(m) TMAOH: tetramethylammonium hydroxide;
(n) TPAOH: tetrapropylammonium hydroxide; and (o) DEA: 2-diethylaminoethanol;
(p) Tetraalkylorthosilicates, such as tetraethylorthosilicate.' Preparative Procedures LiAPSOs may be prepared by forming a starting ~, , reaction mixture mixing lithium phosphate and aluminum oxide, then adding the resultant mixture to the H3P04. To the resultant mixture is added silica and the templating agent and the resulting mixture is blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
AlPO4 ALUMINOPHOSPHATE MOLECULAR SIEVES
The AlPO4 aluminophosphate molecular sieves of U.S. Patent No. 4,310,440 are disclosed as microporous crystalline aluminophosphates having an essential crystal line framework structure whose chemical composition, expressed in terms of molar ratios of oxides, is:
A12O3: 0-8-1-2 P205-The pores of the framework structure are uniform and in each species have nominal diameters of from 3 to 10 Angstroms; the aluminophosphates have an intracrystalline adsorption capacity for water at 4.6 Torr and 24C of at least 3.5 weight percent, the adsorption of water being completely reversible while -123- 13~ 6717 retaining the same essential framework topology in both the hydrated and dehydrated~state. By the ter~
"essential framework topology" is meant the spatial arrangement of the primary Al-O and P-O bond linkages.
S No change in the framework topology indicates that there is no disruption of these primary bond linkages.
The aluminophosphates are prepared by hydrothermal crystallization of a reaction mixture prepared by combining a reactive source of phosphate, alumina and water and at least one structure-directing or templating agent which can include an organic amine and a quaternary ammonium salt. In the as-synthesized form, the structure-directing agent is contained within the framework structure of the aluminophosphate in amounts which vary from species to species but usually do not exceed one mole per mole of A1203 thereof. This structure-directing agent is readily removed by water washing or calcination and does not appear to be an essential constituent of the aluminophosphate, as evidenced by essentially complete absence of ion-exchangeability of the as-synthesized compositions and also the complete absence of any internally-contained organic molecules in the as-synthesized form of at least one species of the generic class. Evidence that structure-directing agent is a critical constituent is contained in certain of the Examples of the Patent - . ~
-124- ~
- 4,310,440, wherein reaction mixtures,~-otherwise identical to those which yield the AlPO4 products except for the presence of templating agents, yield instead the previously known aluminophosphate phases AlPO4.I.I-1.3 H2O, AlPO4-tridymite, AlPO4-quartz and AlPO4-cristobalite.
The AlPO4 aluminophosphates are prepared by forming a reaction mixture which contains, in terms of molar ratios of oxides:
A12O3 : 0.5-1.5 P2O5 :7-100 H2O
and contains from about 0.2 to 2.0 moles of templating agent per mole of A12O3. The reaction mixture is placed in a reaction vessel inert toward the reaction system and heated at a-temperature of at least about 100-C, preferably between 100-C and 300-C, until crystallized, usually a period from 2 hours to 2 weeks. The-solid crystalline reaction product is then recovered by any convenient method, such as filtration or centrifugation, washed with water and dried at a temperature between ambient and llO-C, preferably in air.
MeAPO MOLECULAR SIEVES
MeAPO molecular sieves are crystalline microporous aluminophosphates in which the substituent metal is one of a mixture of two or more divalent metals of the group magnesium, manganese, zinc and cobalt and are disclosed in U.S. Patent No. 4,567,029. ~embers of -125- - 133671~
- this novel class of compositions have-a thre-e-dimensional microporous crystal framewor~ st.~cture of M02 2, A10 2 and PO 2 tetrahedral units and have an essential empirical chemical composition, on an anhydrous basis, of:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (MXAlyPz)02 and has a value of from zero to 0.3, the maximum value in each case depending upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular metal aluminophosphate involved; "x", "y", and "z" represent the mole fractions of the metal "M", (i.e., magnesium, manganese, zinc and cobalt), aluminum and phosphorus, respectively, present as tetrahedral oxides, said mole fractions being such that they are representing the following values for "x", "y", and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.35 0.05 0.60 D 0O35 0060 0.05 -126- 13367 1~
When synthesized the minimum value of "m" in-the formula above is 0.02. In a preferrèd subclass of the metal aluminophosphates of this invention, the values of "x", "y" and "z" in the formula above are representing the following values for "x", "y" and -z":
Mole Fraction Point x Y z a 0.01 0.52 0.47 b 0.01 0.39 0.60 c 0.25 0.15 0.60 d 0.25 0.40 0.35 The as-synthesized compositions are capable of withstanding 350-C calcination in air for extended periods, i.e., at least 2 hours, without becoming amorphous. While it is believed that the M, Al and P
framework constituents are present in tetrahedral coordination with oxyqen, it is theoretically possible that some minor fraction of these framework constituents are present in coordination with five or six oxygen atoms. It is not, moreover, necessarily the case that all of the M, Al and/or P content of any given synthesized product is a part of the framework in the aforesaid types of coordination with oxygen. Some of each constituent may be merely occluded or in some as yet undetermined form and may or may not be structurally significant.
~ Since the term "metal aluminophosphate" is somewhat cumbersome, particularly in view of the need for numerous repetitions thereof in describing such compositions, the "short-hand" reference "MeAPO" is S employed hereinafter. Also in those cases where the metal "Me" in the composition is magnesium, the acronym MAPO is applied to the composition. Similarly, ZAPO, MnAPO, and CoAPO are applied to the compositions which contain zinc, manganese and cobalt, respectively. To identify the various structural species which make up each of the subgeneric classes MAPO, ZAPO, CoAPO and MnAPO, each species is assigned a number and is identified, for example, as ZAPO-5, MAPO-ll, CoAPO-ll and so forth.
The term "essential empirical chemical composition" is meant to include the crystal framework and can include any organic templating agent present in the pore system, but does not include al~ali metal or other ions which can be present by virtue of being contained in the reaction mixture or as a result of post-synthesis ion-exchange. Such ionic species, when present, function primarily as charge-balancing ions for A102 and/or M02 2 tetrahedra not associated with P02+
tetrahedra or an organic ion derived from the organic templating agent.
~-128- 1336717 - The metal aluminophosphates ("MeAPOs"~ are - synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the metal "M", alumina and phosphate, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenouspressure at a temperature between 100C and 225C, and preferably between 100C and 200-C, until crystals of the metal aluminophosphate product are obtained, usually a period of from 4 hours to 2 weeks. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the MeAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of molar ratios as follows:
aR : (MXAlyPz)O2 : b~2O
wherein "R" is an organic templating agent; "a" has a value great enough to constitute an effective concentration of "R" and is within the rànge of >0 to 6;
"b" has a value of from zero to 500, preferably 2 to 30 "M" represents a metal of the group zinc, magnesium, manganese and cobalt, "x", "y" and "z" represent the `129- 133-6717 ~ mole fractions, respectively, of "M", aluminum and - phosphorus in the (MXAlyPz)02 constituent, and each has a value of at least 0.01, the said points E, F, G, H, I, and J representing the following values for "x", "y" and nzn Mole Fraction Point x y z E 0.01 0.70 0.29 F 0.01 0.29 0.70 G 0.29 0.01 0.70 H 0.40 0.01 0.59 I 0.40 0.59 0.01 J 0.29 0.70 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (M + Al + P) = (x + y + z) = 1.00 mole.
In forming the reaction mixture from which the metal aluminophosphates are crystallized the organic templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates and microporous aluminophosphates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably N or P and most preferably N, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred nitrogen-containing compounds for use as templating agents are the amines and quaternary ammonium compounds, the latter being represènted generally by the formula R4N wherein each R is an alkyl or aryl group containing from 1 to 8 carbon atoms.
Polymeric quaternary ammonium salts such as ~(C14H32N2)(0H)2]x wherein "x" has a value of at least 2 are also suitably employed. Both mono-, di- and triamines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired metal aluminophosphates or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions:
di-n-propylamine; tripropylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N-N-dimethylethanolamine; choline;
N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine; N-methylethanolamine;
N-methylpiperidine; 3-methylpiperidine;
.
- N-methylcyclohexylamine; 3-methylpyridine: - ~
~ 4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine, neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every species of metal aluminophosphate (MeAPO), i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several MeAPO compositions, and a given MeAPO composition can be produced using several different templating agents.
The preferred phosphorus source is phosphoric acid, but organic phosphates such as triethylphosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlPO4 composition of U.S. Patent No. 4,310,440.
Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide do not, apparently serve as reactive sources of phosphorus, but these compounds do function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum al~oxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of ~ --- phosphorus are, of course, a~lso suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
The metals zinc, cobalt, magnesium and manganese can be introduced into the reaction system in any form which permits the formation in situ of reactive divalent ions of the respective metals. Advantageously salts, oxides or hydroxides of the metals are employed such as cobalt chloride hexahydrate, alpha cobaltous iodide, cobaltous sulfate, cobalt acetate, cobaltous bromide, cobaltous chloride, zinc acetate, zinc bromide, zinc formate, zinc iodide, zinc sulfate heptahydrate, magnesium acetate, magnesium bromide, magnesium chloride, magnesium iodide, magnesium nitrate, magnesium sulfate, manganous acetate, manganous bromide, manganous sulfate, and the like.
While not essential to the synthesis of MeAPO
compositions, it has been found that in general, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the MeAPO species to be produced or a topologically similar aluminophosphate or aluminosilicate composition, facilitates the ~- - -- crystallization procedure.
After crystallization the MeAP0 product is isolated and advantageously washed with water and dried in air. The as-synthesized MeAP0 contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular MeAP0 species. As a general rule, the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the MeAP0 product and must be removed by calcining the MeAP0 at temperatures of 200-C to 700-C to thermally degrade the organic species. In a few instances the pores of the MeAP0 product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein does not include the condition of the MeAPO phase wherein the organic moiety occupying the intracrystalline pore system as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (MxAlyPz)O2 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an aluminum alkoxide is employed as the source of aluminum, the corresponding alcohol is necec-~Arily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the synthesis process as a templating agent. For the lS purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized MeAPO
material.
Since the MeAPO compositions are formed from AlO2, PO2, and MO2 tetrahedral units which, respectively, have a net charge of -1, +1, and -2, the matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between AlO2 tetrahedra and charge-balancing cations. In the MeAPO compositions, an A102- tetrahedron can be balanced electrica~ e7r by association with a P02+ tetrahedron or a simple cation, such as an alkali metal cation, a cation of the metal ~M~ present in the reaction mixture, or an organic cation derived from the templating agent.
Similarly an M02-2 tetrahedron can be balanced electrically by association with PO2+ tetrahedra, a cation of the metal "M", organic cations derived from the templating agent, or other divalent or polyvalent metal cations introduced from an extraneous source. It has also been postulated that non-adjacent A102- and PO2+ tetrahedral pairs can be balanced by Na+ and OH-, respectively [Flanigen and Grose, Molecular Sieve Zeolites-I, ACS, Washington, D.C. (1971)].
FAPO MOLECULAR SIEVES
Ferroaluminophosphates are disclosed in U.S.
Patent No. 4,554,143, and have a three-dimensional microporous crystal framework structure of FeO2n, A102-and P02+ tetrahedral units and have an essential empirical chemical composition, on an anhydrous basis, of:
mR : (Fe~Alypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystal line pore system; "m"
represents the moles of "R" present per mole of (Fe~AlyPz)02 and has a value of from zero to 0.3, the D-i4643 i maximum value in each case depending upon the molecular dimensions of the templating agent and the available void volume of the pore system of the particular ferroaluminophosphate involved; "x", "y", and "z"
represent the mole fractions of iron, aluminum and phosphorus, respectively, present as tetrahedral oxides, representing the following values for "x", "y", and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.35 0.05 0.60 D 0.35 0.60 0.05 When synthesized the minimum value of "m" in the formula above is 0.02. In.a preferred subclass of the ferroaluminophosphates the values of "x", "y" and "z" in the formula above are representing the following values for "x", nyn and "z":
Mole Fraction 20 Point x y Z
a 0.01 - 0.52 0.47 b 0.01 0.39 0.60 c 0.25 0.15 0.60 d 0.25 0.40 0.35 The iron of the FeO2 structural units can be in either the ferric or ferrous valence state, depending largely upon the source of the iron in the synthesis gel. Thus, an FeO2 tetrahedron in the structure can have a net charge of either -1 or -2. While it is believed that the Fe, Al and P framework constituents are present in tetrahedral coordination with oxygen (and are referred to herein as such), it is theoretically possible that some minor fraction of these framework constituents are present in coordination with five or six oxygen atoms. It is not, moreover, necessarily the case that all of the Fe, Al and/or P content of any given synthesized product is a part of the framework in the aforesaid types of coordination with oxygen. Some of each constituent may be merely occluded or in some as yet undetermined form, and may or may not be structurally significant.
For convenience in describing the ferroaluminophosphates, the "short-hand" acronym "FAPO"
is sometimes employed hereinafter. To identify the various structural species which make up the generic class FAPO, each species is assigned a number and is identified, for example, as FAPO-11, FAPO-31 and so forth.
The term "essential empirical chemical composition" is meant to include the crystal framework and can include any organic templating agent present in the pore system, but does not include alkali metal or other ions which can be present by virtue of being contained in the~reaction ~ixture or as a result of post-synthesis ion-exchange. Such ionic species, when present, function primarily as charge-balancing ions for FeO2 and/or AlO2 2 tetrahedra, FeO2 2 tetrahedra associated with PO2+ tetrahedra or not associated with PO2 tetrahedra or an organic ion derived from the organic templating agent.
The af oresaid ferroaluminophosphates are synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of iron oxide, alumina and phosphate, an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and optionally an alkali metal. The reaction mixture is placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetra-fluoroethylene and heated, preferably under autogenous pressure at a temperature of at least lOO-C, and preferably between lOO-C and 250-C, until crystals of the ~etal aluminophosphate product are obtained, usually a period of from 2 hours to 2 weeks. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the FAP0 compositions, it is _139_ 1 3 3 6 7 17 preferred to employ a reaction mixture composition expressed in terms of molar ratios as follows:
aR : (FexAlyPz)02 : bH2O
wherein "R" is an organic templating agent; "a" has a value great enough to constitute an effective concentration of "R" and is within the range of >0 to 6;
"b" has a value of from zero to 500, preferably 2 to 80;
"x", "y" and "z" represent the mole fractions, respectively, of iron, aluminum and phosphorus in the (FexAlyPz)O2 constituent, and each has a value of at least 0.01, and representing the following values for "x", "y" and -z":
Mole Fraction Point x y z E 0.01 0.70 0.29 F 0.01 0.29 0.70 G 0.29 0.01 0.70 H 0.40 0.01 0.59 I 0.40 0.59 0.01 J 0.29 0.70 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (Fe + Al + P) = (x + y + z) - 1.00 mole.
In forming the reaction mixture from which the ferroaluminophosphates are crystallized, the organic templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates and microporous aluminophosphates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably N or P and most preferably N, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred nitrogen-containing compounds for use as templating agents are the amines and quaternary ammonium compounds, the latter being represented generally by the formula R4N wherein each R is an alkyl or aryl group containing from 1 to 8 carbon atoms.
Polymeric quaternary ammonium salts such as [(C14H32N2)(OH)2]X wherein "x" has a value of at least 2 are also suitably employed. Mono-, di- and triamines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired metal aluminophosphates or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions;
di-n-propylamine; tri-n-propylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N-N-dimethylethanolamine; choline;
N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine; N-methylethanolamine;
N-methylpiperidine; 3-methylpiperidine;
N-methylcyclohexylamine; 3-methylpyridine;
4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine; neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every species of ferroaluminophosphate (FAPO), i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several FAPO
compositions, and a given FAPO composition can be produced using several different templating agents.
The phosphorus source is preferably phosphoric acid, but organic phosphates such as triethylphosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlP04 composition of U.S. Patent No. 4,310,440.
Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide do not, apparently serve as reactive - - ` 1336717 sources of phosphorus, but these compounds do function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum alkoxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
Iron can be introduced into the reaction system in any form which permits the formation in situ of reactive ferrous or ferric ions. Advantageously iron salts, oxides or hydroxides are employed such as iron sulfate, iron acetate, iron nitrate, or the like.
Other sources such as a freshly precipitated iron oxide r-Fe~OH, are also suitable.
While not essential to the synthesis of FAPO
compositions, it has been found that in general, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the FAPO species to be produced or a topologically similar aluminophosphate or -aluminosllicate composition, facilitates the crystallization procedure.
After crystallization the FAPO product is isolated and advantageously washed with water and dried in air. The as-synthesized FAPO contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular FAPO species.
As a general rule, the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the FAPO product and must be removed by calcining the FAPO at temperatures of 200C
to 700 C to thermally degrade the organic species. In a few instances the pores of the FAPO product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein and in the claims does not include the condition of the FAP0 phase wherein the organic moiety occupying the intracrystalline pore system`as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (FexAlyPz)O2 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an aluminum alkoxide is employed as the source of aluminum, the corresponding alcohol is necessarily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the syntheses process as a templating agent. For the purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized FAPO
material.
Since the FAPO compositions are formed from AlO2 , PO2 , FeO2 and/or FeO2 2 units the matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between A102 tetrahedra and charge-balancing cations. In the FAPO compositions, an A102 tetrahedron can be balanced electrically either by association with a PO2 tetrahedron or a Simple cation such as an kali metal cation, a Fe+2 or Fe+3 cation present in the reaction mixture, or an organic cation derived from the templating agent. Similarly an Fe02~ or FeO2~2 tetrahedron can be balanced electrically by association with PO2+ tetrahedron, a Fe+2 or Fe+3 cation, organic cations derived from the templating agent, or other metal cat ion introduced from an extraneous source. It has also been postulated that non-adjacent A102- and P02+ tetrahedral pairs can be balanced by Na+ and OH-, respectively [Flanigen and Grose, Molecular 5ieve Zeolites-I, ACS, Washington, D.C. (1971)).
TAPO MOLECULAR SIEVES
TAPO molecular sieves are disclosed in U.S. IS
Patent No. 4,500,561, and comprise a three-dimensional microporous crystal framework structure of TiO2, A102-and P02+ tetrahedral units which has a unit empirical formula on an anhydrous basis of:
mR: (TixAlypz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the moles of "R" present per mole of (TiXAlyPz)02 and has a value of between zero and about 5.0, the maximum value in each case depending upon the molecular dimensions of the templating agent and the B~
available void volume of~pore system of the particular titanium molecular sieve; 'ix", "y" and "z" represent the mole fractions of titanium, aluminum and phosphorus, respectively, present as tetrahedral oxides, representing the following values for "x", "y" and "z":
. Mole Fraction Point x y z A 0.001 0.45 0.549 B 0.88 0.01 0.11 C 0.98 0.01 0.01 D 0.29 0.70 0.01 E 0.001 0.70 0.299 The parameters "x", "y" and "z" are preferably within the following values for "x", "y" and "z":
. Mole Fraction Point x y z a 0.002 0.499 0.499 b 0.20 0.40 0.40 c 0.20 0.50 0.30 d 0.10 0.60 0.30 e 0.002 0.60 0.398 The titanium-containing molecular sieves are referred to hereinafter, solely for point of reference herein as "TAPO" molecular sieves, or as "TAPOs" if the reference is to the class as a whole. This designation is simply made for the sake of convenient reference herein and is not meant to designate a particular structure for any given TAPO molecular sieve. The members of the class of TAPO's employed hereinafter in the examples will be characterized simply by referring S to such members as TAPO-5, TAPO-ll, etc, i.e., a particular species will be referred to as TAPO-n where "n" is a number specific to a given class member as its preparation is reported herein. This designation is an arbitrary one and is not intended to denote structural relationship to another material(s) which may also be characterized by a numbering system.
The term "unit empirical formula" is used herein according to its common meaning to designate the simplest formula which gives the relative number of lS moles of titanium, aluminum and phosphorus which form the ~Tio2], tPO2] and ~AlO2] tetrahedral unit within a titanium-containing molecular sieve and which forms the molecular framework of the TAPO composition(s). The unit empirical formula is given in terms of titanium, - 20 aluminum and phosphorus as shown in Formula (1), above, and does not include other compounds, cations or anions which may be present as a result of the preparation or the existence of other impurities or materials in the bulk composition not containing the aforementioned tetrahedral unit. The amount of template R is reported as part of the composition when the as-synthesized unit empirical formula is given, and water may also be reported unless such is defined as the anhydrous form.
For convenience, coefficient "m" for template "R" is reported as a value that is normalized by dividing the number of moles of organic templating agent ~y the total moles of titanium, aluminum and phosphorus.
The unit empirical formula for a TAPO may be given on an "as-synthesized" basis or may be given after an "as-synthesized" TAPO composition has been subjected to some post treatment process, e.g., calcination. The term "as-synthesized" herein shall be used to refer to the TAPO composition(s) formed as a result of the hydrothermal crystallization but before the TAPO
composition has been subjected to post treatment to remove any volatile components present therein. The actual value of "m" for a post-treated TAPO will depend on several factors (including: the particular TAPO, template, severity of the post-treatment in terms of its ability to remove the template from the TAPO, the proposed application of the TAPO composition, and etc.) and the value for "m" can be within the range of values as defined for the as-synthesized TAP0 compositions although such is generally less than the as-synthesized TAPO unless such post-treatment process adds template to the TAPO so treated. A TAP0 composition which is in the calcined or other post-treatment form generally has an -149- ~ 1336717 ~ empirical formula represented by Formula~(l), except that the value of "m" is genèrally less than about 0.02t.
Under sufficiently severe post-treatment conditions, e.g., roasting in air at high temperature for long periods (over 1 hr.), the value of "m" may be zero (0) or, in any event, the template, R, is undetectable by normal analytical procedures.
The TAPO molecular sieves are generally further characterized by an intracrystalline adsorption capacity for water at 4.6 torr and about 24C of about 3.0 weight percent. The adsorption of water has been - observed to be completely reversible while retaining the same essential framework topology in both the hydrated and dehydrated state. The term "essential framework topology" is meant to designate the spatial arrangement of the primary bond linkages. A lack of change in the framework topology indicates that there is no disruption of these primary bond linkages.
The TAPO molecular sieves are generally synthesized by hydrothermal crystallization from a reaction mixture comprising reactive sources of titanium, aluminum and phosphorus, and one or more organic templating agents. Optionally, alkali metal(s) may be present in the reaction mixture. The reaction mixture is placed in a pressure vessel, preferably lined with an inert plastic material, such as polytetra-` 1336717 fluoroethylene, and heated, preferably under autogenous ~ pressure, at a temperature of at least about 1007C, and preferably between lOO'C and 250C, until crystals of the molecular sieve product are obtained, usually for a period of from 2 hours to 2 weeks. While not essential to the synthesis of the TAPO molecular sieves, it has been found that in general stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the TAPO
to be produced, or a topologically similar composition, facilitates the crystallization procedure. The product is recovered by any convenient method such as centrifugation or filtration.
After crystallization the TAPO(s) may be isolated and washed with water and dried in airO As a result of the hydrothermal crystallization, the as-synthesized TAPO contains within its intracrystalline pore system at least one form of the template employed in its formation. Generally, the template is a molecular species, but it is possible, steric considerations permitting, that at least some of the template is present as a charge-balancing cation.
Generally the template is too large to move freely through the intracrystalline pore system of the formed TAP0 and may be removed by a post-treatment process, such as by calcining the TAPO at temperatures of between ` 1336717 about 200~C and to about 700C so as to thermally degrade the template or by employing some other post-treatment process for removal of at least part of the template from the TAPO. In some instances the pores of the TAPO are sufficiently large to permit transport of the template, and, accordingly, complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites.
The TAPOs are preferably formed from a reaction mixture having a mole fraction of alkali metal cation which is sufficiently low that it does not interfere with the formation of the TAPO composition.
The TAPO compositions are generally formed from a reaction mixture containing reactive sources of TiO2, A12O3, and P2O5 and an organic templating agent, said reaction mixture comprising a composition expressed in terms of molar oxide ratios of:
fR2O : (TixAlyPz)O2 : g H2O
wherein "R" is an organic templating agent; "f" has a value large enough to constitute an effective amount of "R", said effective amount being that amount which form said TAPO compositions; "g" has a value of from zero to 500; "x", "y" and "z" represent the mole fractions, respectively of titanium, aluminum and phosphorus in the (TiXAlyPz)02 constituent, and each has a value of at least 0.001 and being within the following values for "x", "y" and "z":
Mole Fraction Point x y z h 0.001 0.989 0.01 i 0.001 0.01 0.989 j 0.32 0.24 0.44 k 0.98 0.01 0.01 Although the TAP0 compositions will form if higher concentrations of alkali metal cation are present, such reaction mixtures are not generally preferred. A reaction mixture, expressed in terms of molar oxide ratios, comprising the following bulk composition is preferred:
oR2 WM2 (TixAlyPz)2 nH2 wherein "R" is an organic template; "o" has a value great enough to constitute an effective concentration of "R" and is preferably within the range of from greater than zero (0) to about S.0; "M" is an alkali metal cation; "w" has a value of from zero to 2.5; "n" has a value between about zero (0) and about 500; "x", "y" and "z" represent the mole fractions, respectively, of titanium, aluminum and phosphorus in the (TiXAlyPz)02 constituent, and each has a value of at least 0.001 and being within the following values for "x", '~y" and "z":
Mole Fraction Point x y z h 0.001 0.989 0.01 i 0.001 0.01 0.989 S j 0.32 0.24 0.44 k - 0.98 0.01 0.01 When the TAPOs are synthesized by this method the value of "m" in Formula (1) is generally above about 0.02.
Though the presence of alkali metal cations is not preferred, when they are present in the reaction mixture it is preferred to first admix at least a portion (e.g., at least about 10 weight percent) of each of the aluminum and phosphorus sources in the substantial absence (e.g., preferably less than about 20 percent of the total weight of the aluminum source and phosphorus source) of the titanium source. This procedure avoids adding the phosphorus source to a basic reaction mixture containing the titanium source and aluminum source, (as was done in most of the published attempts to substitute isomorphously [PO2] tetrahedra for ~SiO2] tetrahedra in zeolitic structures). Although the reaction mechanism is by no means clear at this time, the function of the template may be to favor the incorporation of [PO2] and ~Al02] tetrahedra in the framework structures of the crystalline products with .
~Tio2] tetrahedra isomorphously replacing ~PO2]
tetrahedra.
The reaction mixture from which these TAPOs are formed contains one or more organic templating agents (templates) which can be most any of those heretofore proposed for use in the synthesis of aluminosilicates and aluminophosphates. The template preferably contains at least one element of Group VA of the Periodic Table, particularly nitrogen, phosphorus, arsenic and/or antimony, more preferably nitrogen or phosphorus and most preferably nitrogen and is desirably of the formula R4X wherein X is selected from the group consisting of nitrogen, phosphorus, arsenic and/or antimony and R may be hydrogen, alkyl, aryl, aralkyl, or alkylaryl group and is preferably aryl or alkyl containing between 1 and 8 carbon atoms, although more than eight carbon atoms may be present in the group "R"
of the template. Nitrogen-containing templates are preferred, including amines and quaternary ammonium compounds, the latter being represented generally by the formula R'4N wherein each R' is an alkyl, aryl, alkylaryl, or aralkyl group; wherein R' preferably contains from l to 8 carbon atoms or higher when R' is alkyl and greater than 6 carbon atoms when R' is otherwise, as hereinbefore discussed. Polymeric quaternary ammonium salts such as ~(Cl4H32N2)(0H)2]X
wherein "x" has a value of at least 2 may also be employed. The mono-, di- and triamines, including mixed amines, may also be employed as templates either alone or in combination with a quaternary ammonium compound or another template. The exact relationship of various templates when concurrently employed is not clearly understood. Mixtures of two or more templating agents can produce either mixtures of TAPOs or in the instance where one template is more strongly directing than another template the more strongly directing template may control the course of the hydrothermal crystallization wherein with the other template serving primarily to establish the pH conditions of the reaction mixture.
Representative templates include tetramethylammonium, tetraethylammonium, tetrapropylammonium or tetrabutylammonium ions;
di-n-propylamine; tripropylamine; triethylamine;
triethanolamine; piperidine; cyclohexylamine;
2-methylpyridine; N,N-dimethylbenzylamine;
N,N-diethylethanolamine; dicyclohexylamine;
N,N-dimethylethanolamine; 1,4-diazabicyclo (2,2,2) octane; N-methyldiethanolamine, N-methyl-ethanolamine;
N-methylcy~lohexylamine; 3-methyl-pyridine;
4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine; neopentylamine; di-n-pentylamine;
isopropylamine; t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every template will produce every TAPO composition although a single S template can, with proper selection of the reaction conditions, cause the formation of different TAPO
compositions, and a given TAPO composition can be produced using different templates.
In those instances where an aluminum alkoxide is the reactive aluminum source, the corresponding alcohol is necessarily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not as yet been determined whether this alcohol participates in the synthesis process as a templating agent, or in some other function and, accordingly, is not reported as a template in the unit formula of the TAPOs, although such may be acting as templates.
Alkali metal cations, if present in the reaction mixture, may facilitate the crystallization of certain TAPO phases, although the exact function of such cations, when present, in crystallization, if any, is not presently known. Alkali cations present in the reaction mixture generally appear in the formed TAPO
composition, either as occluded (extraneous) cations and/or as structural cations balancing net negative charges at various sites in the crystal lattice. It should be understood that alShough the unit formula for the TAPOs does not specifically recite the presence of alkali cations they are not excluded in the same sense that hydrogen cations and/or hydroxyl groups are not S specifically provided for in the traditional formulae for zeolitic aluminosilicates.
Almost any reactive titanium source may be employed herein. The preferred reactive titanium sources include titanium alkoxides, water-soluble titanates and titanium chelates.
Almost any reactive phosphorus source may be employed. Phosphoric acid is the most suitable phosphorus source employed to date. Accordingly, other acids of phosphorus are generally believed to be lS suitable phosphorus sources for use herein. Organic phosphates such as triethyl phosphate have been found satisfactory, and so also have crystalline or amorphous aluminophosphates such as the AlPO4 compositions of U.S.
Patent 4,310,440. Organo-phosphorus compounds, such as tetrabutyl-phosphonium bromide have not, apparently, served as reactive sources of phosphorus, but these compounds do function as templating agents and may also be capable of being suitable phosphorus sources under proper process conditions (yet to be ascertained).
Organic phosphorus compounds, e.g., esters, are believed to be generally suitable since they can generate acids of phosphorus in situ. Conventional phosphorus salts, such as sodium metaphosphate, may be used, at least in part as the phosphorus source, but they are not preferred.
Almost any reactive aluminum source may be employed herein. The preferred reactive aluminum sources include aluminum alkoxides, such as aluminum isopropoxide, and pseudoboehmite. Crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but as generally not preferred.
Since the exact nature of the TAPO molecular sieves are not clearly understood at present, although all are believed to contain ~TiO2] tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the TAPO
molecular sieves by means of their chemical composition.
This is due to the low level of titanium present in certain of the TAPO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between titanium, aluminum and phosphorus. As a result, although it is believed that titanium, [Tio2], has substituted isomorphously for _159_ [Al02] or [P02] tetrahedra, it is appropriate to characterize certain TAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides in the as-synthesized and anhydrous form as:
vR : pTio2 : qA12O3 : rP2O5 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "v"
represents an effective amount of the organic templating agent to form said TAP0 compositions and preferably has a value between and including zero and about 3.0; "p", "q" and "r" represent moles, respectively, of titanium, alumina and phosphorus pentoxide, based on said moles being such that they are within the following values for "p", "q" and "r":
Mole Fraction Point ~ g A 0.004 1.0 1.22 B 176 1.0 11.0 C 196 1.0 1.0 D 0O828 1.0 0.0143 E - 0.003 1.0 0.427 The parameters "p", "q" and "r" are preferably within the following values for "p", "q" and "r":
`~ 1336717 Mole Fraction Polnt ~ ~ E
a 0.008 1.0 1.0 b 1.0 1.0 1.0 c 0.80 1.0 0.60 d - 0.333 1.0 0.50 e 0.067 1.0 0.663 ELAPO MOLECULAR SIEVES
"ELAPO" molecular sieves are a class of crystalline molecular sieves in which at least one element capable of forming a three-dimensional microporous framework forms crystal framework structures of AlO2 , PO2 and MO2n tetrahedral oxide units wherein "MO2n" represents at least one different element (other 1~ than Al or P) present as tetrahedral oxide units "MO2n"
with charge "n" where "n" may be -3, -2, -1, 0 or +1.
The members of this novel class of molecular sieve compositions have crystal framework structures of AlO2 , PO2 and MO2n tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)O2; "M" represents at least one element capable - 161 - 1~6717 of forming framework tetrahedral oxides; and "x", "y"
and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. "M" is at least one different (i.e., not aluminum, phosphorus or oxygen) element such that the molecular sieves contain at least one framework tetrahedral unit in addition to AlO2- and PO2+. "M" is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc, subject to certain restrictions on the combinations of elements as will appear from the discussions of individual groups of ELAPOs below. ELAPOs and their preparation are disclosed in European Patent Application Serial No.
85104386.9, filed April 11, 1985 (EPC Publication No.
0158976, published October 13, 1985) and 85104388.5, filed April 11, 1985 (EPC Publication No. 158349, published October 16, 1985.
The "ELAPO" molecular sieves further include numerous species which are intended herein to be within the scope of the term "non-zeolitic molecular sieves"
such being disclosed in the following commonly assigned patents or applications [(A) following a serial number indicates that the application is abandoned and (C) indicates that the application is a continuation of the immediately preceding patent or application):
~,.j U.S. Patent Serial No. Filed 4,913,888 Feb. 19, 1986 AsAPo 4,952,383 March 24, 1987 BAPO
4,940,570 March 3, 1986 BeAPO
4,759,919 Feb. 19, 1986 CAPO
4,888,167 March 20, 1986 GeAPO
4,789,535 Feb. 28, 1986 LiAPo 4,686,093 April 13, 1984 FCAPO
The ELAPO molecular sieves are generally referred to herein by the acronym "ELAPO" to designate - 1~36717 element(s) "M" in a framework of Al02 , P02 and M02n tetrahedral oxide units. Actual class members will be identified by replacing the "EL" of the acronym with the elements present as M02n tetrahedral units. For example, "MgBeAPO" designates a molecular sieve comprised of Al02 , P02 , Mgo2 2 and BeO2 2 tetrahedral units. To identify various structural species which make up each of the subgeneric classes, each species is assigned a number and is identified as "ELAPO-i" wherein "i" is an integer. The given species designation is not intended to denote a similarity in structure to any other species denominated by a similar identification system.
The ELAPO molecular sieves comprise at least one additional element capable of forming framework tetrahedral oxide units (M02n) to form crystal framework structures with Al02 and P02 tetrahedral oxide units wherein "M" represents at least one element capable of forming tetrahedral units "M02n" where "n" is -3, -2, -1, 0 or +1 and is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc.
The ELAPO molecular sieves have crystalline three-dimensional microporous framework structures of Al02 , P02 and M02n tetrahedral units and have an ~ - -165- 133 67 17 empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MXAlyPz)O2;
wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; "M"
represents at least one element capable of forming framewor~ tetrahedral oxides where "M" is at least one element selected from the group consisting of arsenic, beryllium, boron, cobalt, chromium, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc.
The relative amounts of element(s) "M", aluminum and phosphorus are expressed by the empirical 5 chemical formula (anhydrous):
mR : (MxAlyPz)02 where "x", "y" and "z" represent the mole fractions of said "M", aluminum and phosphorus. The individual mole fractions of each "M" (or when M denotes two or more elements, Ml, M2, M3, etc.) may be represented by "x1", "x ", "x3", etc. wherein "x1", "x2", and X3 etc.
represent the individual mole fractions of elements Ml, M2, M3, and etc. for "M" as above defined. The values of "xl", "x2", "x3ll, etc. are as defined for "x", hereinafter, where "xl" + "x2" + I'x3" . . . = "x" and where xl, x2, X3, etc. are each at least 0.01.
The ELAP0 mo-lecular sieves have crystalline three-dimensiona~l microporo~s framework structures of M02n, Al02 and P02 tetrahedral units having an -empirical chemical composition on an anhydrous basis 5 expressed by the formula:
mR : (MxAlyPz)2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents a molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; "M"
represents at least one different element (other than Al or P) capable of forming framework tetrahedral oxides, as hereinbefore defined, and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides; in general, said mole fractions "x", "y" and "z" are within the following values for "x", "y" and "z", although as will appear hereinbelow, the limits for "x", "y" and "z" may vary slightly with the nature of the element "M":
Mole Fraction Point x y Z
A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 -167- 133 67 1~
Also, in general, in a preferred sub-class of the ELAPOs of this invention, the values of 1'x"; "y" and "z" in the formula above are within the following values for "x", "y" and "z", although again the relevant limits may vary somewhat with the nature of the element "M", as set forth hereinbelow:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 f 0.39 0.60 0.01 EL~PO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between 50-C and 250-C, and preferably between 100C and -168- 13~6717 200C, until crystals of the ELAPO product are obtained, usually a period of from several hours to several weeks.
Typical crystallization times are from about 2 hours to about 30 days with from about 2 hours to about 20 days S being generally employed to obtain crystals of the ELAP0 products. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the ELAPO compositions of the instant invention, it is in general preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "~" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about 500, preferably between about 2 and 300; "M" represents at least one element, as above described, capable of forming tetrahedral oxide framework units, MO2n, with AlO2 and PO2+ tetrahedral units; "n" has a value of -3, -2, -1, 0 or +1; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively;
"y" and "z" each have a value of at least 0.01 and "x"
has a value of at least 0.01 with each element "M"
having a mole fraction of at least 0.01. In general, the mole fractions "x", "y" and "z" are preferably within the following values for "x", "y" and "z": -Mole Fraction Point x y z F 0.01 0.60 0.39 G 0.01 0.39 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 Further guidance concerning the preferred reaction mixtures for forming ELAPOs with various elements "M"
will be given below.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to a total of (M + Al + P) = (x + y + z) = 1.00 mole, whereas in other cases the reaction mixtures are expressed in terms of molar oxide ratios and may be normalized to 1.00 mole of P205 and/or A1203. This latter form is readily converted to the former form by routine calculations by dividing the total number of moles of "M", aluminum and phospho NS into the moles of each of "M", aluminum and phosphorus. The moles of template and water are similarly normalized by dividing by the total moles of "M", aluminum and phosphorus.
In forming the reaction mixture from which the instant molecular sieves are formed the organic D-146~3 - i336717 templating agent can be any of those heretofore proposed for use in the synthesis of conventional zeolite aluminosilicates. In general these compounds contain elements of Group VA of the Periodic Table of Elements, particularly nitrogen, phosphorus, arsenic and antimony, preferably nitrogen or phosphorus and most preferably nitrogen, which compounds also contain at least one alkyl or aryl group having from 1 to 8 carbon atoms.
Particularly preferred compounds for use as templating agents are the amines, quaternary phosphonium compounds and quaternary ammonium compounds, the latter two being represented generally by the formula R4X+ wherein "X" is nitrogen or phosphorus and each R is an alkyl or aryl group containing from 1 to 8 carbon atoms. Polymeric quaternary ammonium salts such as ~(C14H32N2)(OH)2]X
wherein "x" has a value of at least 2 are also suitably employed. The mono-, di- and tri-amines are advantageously utilized, either alone or in combination with a quaternary ammonium compound or other templating compound. Mixtures of two or more templating agents can either produce mixtures of the desired ELAPOs or the more strongly directing templating species may control the course of the reaction with the other templating species serving primarily to establish the pH conditions of the reaction gel. Representative templating agents include tetramethylammonium, tetraethylammonium, `. 1336717 tetrapropylammonium or tetrabutylammonium ions;
tetrapentylammonium ion; di-n-propylamine;
tripropylamine; triethylamine; triethanolamine;
piperidine; cyclohexylamine; 2-methylpyridine;
N,N-dimethylbenzylamine; N,N-dimethylethanolamine;
choline; N,N'-dimethylpiperazine; 1,4-diazabicyclo (2,2,2,) octane; N-methyldiethanolamine;
N-methylethanolamine; N-methylpiperidine;
3-methylpiperidine; N-methylcyclohexylamine;
3-methylpyridine; 4-methylpyridine; quinuclidine;
N,N'-dimethyl-1,4-diazabicyclo (2,2,2) octane ion;
di-n-butylamine, neopentylamine; di-n-pentylamine;
isopropylamine: t-butylamine; ethylenediamine;
pyrrolidine; and 2-imidazolidone. Not every templating agent will direct the formation of every spécies of ELAPO, i.e., a single templating agent can, with proper manipulation of the reaction conditions, direct the formation of several ELAPO compositions, and a given ELAPO composition can be produced using several different templating agents. The phosphorus source is preferably phosphoric acid, but organic phosphates such as triethyl phosphate may be satisfactory, and so also may crystalline or amorphous aluminophosphates such as the AlPO4 composition of U.S.P. 4,310,440. Organo-2S phosphorus compounds, such as tetrabutylphosphoniumbromide, do not apparently serve as reactive sources of ~ -`172- 1336717 phosphorus, but these compounds may function as templating agents. Conventional phosphorus salts such as sodium metaphosphate, may be used, at least in part, as the phosphorus source, but are not preferred.
The aluminum source is preferably either an aluminum alkoxide, such as aluminum isopropoxide, or pseudoboehmite. The crystalline or amorphous aluminophosphates which are a suitable source of phosphorus are, of course, also suitable sources of aluminum. Other sources of aluminum used in zeolite synthesis, such as gibbsite, sodium aluminate and aluminum trichloride, can be employed but are not preferred.
The element(s) "M" can be introduced into the reaction system in any form which permits the formation in situ of reactive form of the element, i.e., reactive to form the framework tetrahedral oxide unit of the element. The organic and inorganic salts, of "M" such as oxides, alkoxides, hydroxides, halides and carboxylates, may be employed including the chlorides, bromides, iodides, nitrates, sulfates, phosphates, acetates, formates, and alkoxides, including ethoxides, propoxides and the like. Specific preferred reagents for introducing various elements "M" are discussed hereinbelow.
While not essential to the synthesis of ELAP0 compositions, stirring or other moderate agitation of the reaction mixture and/or seeding the reaction mixture with seed crystals of either the ELAPO species to be produced or a topologically similar species, such as aluminophosphate, alumino-silicate or molecular sieve compositions, facilitates the crystallization procedure.
After crystallization the ELAPO product may be isolated and advantageously washed with water and dried in air. The as-synthesized ELAPO generally contains within its internal pore system at least one form of the templating agent employed in its formation. Most commonly the organic moiety is present, at least in part, as a charge-balancing cation as is generally the case with as-synthesized aluminosilicate zeolites prepared from organic-containing reaction systems. It is possible, however, that some or all of the organic moiety is an occluded molecular species in a particular ELAPO species. As a general rule the templating agent, and hence the occluded organic species, is too large to move freely through the pore system of the ELAPO product and must be removed by calcining the ELAPO at temperatures of 200-C to 700C to thermally degrade the organic species. In a few instances the pores of the ELAPO product are sufficiently large to permit transport of the templating agent, particularly if the latter is a small molecule, and accordingly complete or partial removal thereof can be accomplished by conventional desorption procedures such as carried out in the case of zeolites. It will be understood that the term "as-synthesized" as used herein does not include the condition of the ELAP0 phase wherein the organic moiety occupying the intracrystalline pore system as a result of the hydrothermal crystallization process has been reduced by post-synthesis treatment such that the value of "m" in the composition formula:
mR : (MXAlyPz)02 has a value of less than 0.02. The other symbols of the formula are as defined hereinabove. In those preparations in which an alkoxide is employed as the source of element "M", aluminum or phosphorus, the corresponding alcohol is necesc~rily present in the reaction mixture since it is a hydrolysis product of the alkoxide. It has not been determined whether this alcohol participates in the synthesis process as a templating agent. For the purposes of this application, however, this alcohol is arbitrarily omitted from the class of templating agents, even if it is present in the as-synthesized ELAPO material.
Since the present ELAPO compositions are formed from MO2n, A102 and PO2+ tetrahedral oxide units which, respectively, havé a net charge of "n", (where "m" may be -3, -2, -1, 0 or +1), -1 and +1~ ~ ~ 717 matter of cation exchangeability is considerably more complicated than in the case of zeolitic molecular sieves in which, ideally, there is a stoichiometric relationship between A102- tetrahedra and charge-balancing cations. In the instant compositions, an A102- tetrahedron can be balanced electrically either by association with a PO2+
tetrahedron or a simple cation such as an alkali metal cation, a proton (H+), a cation of "M" present in the reaction mixture, or an organic cation derived from the templating agent. Similarly an MO2n tetrahedron, where "n" is negative, can be balanced electrically by association with PO2+
tetrahedra, a cation of "M" present in the reaction mixture, organic cations derived from the templating agent, a simple cation such as an alkali metal cation, or other divalent or polyvalent metal cation, a proton (H+), or anions or cations introduced from an extraneous source. It has also been postulated that non-adjacent A102- and PO2+
tetrahedral pairs can be balanced by Na+ and OH-respectively (Flanigen and Grose, Molecular Sieve Zeolites-I, ACS, Washington, DC (1971).
AsAPO MOLECULAR SIEVES
The AsAPO molecular sieves have a framework ~,i' ,.., .~
- ` 1336717 structure of AsO2n, A102 and PO2 tetrahedral units - (where "n" is -1 or +1) and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (AsxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (AsxAlyPz~O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", -y" and "z" represent the mole fractions of the elements arsenic, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 20 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 There are two preferred subclasses of the 25 AsAPO molecular sieves, depending upon whether the value of "n" is -1 or +1 (i.e. whether the arsenic is trivalent or pentavalent), it being understood that mixtures of such are permitted in a given AsAPO. When "n" is -1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.01 0.59 0.40 b 0.01 0.39 0.60 c 0.39 0.01 0.60 d 0.59 0.01 0.40 When "n" is +1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y z e 0.01 0.60 0.39 f 0.01 0.40 0.59 g 0-59 0.40 0.01 h 0.39 0.60 0.01 In an especially preferred subclass of the AsAPO molecular sieves in which "n" = +1, the values of x, y and z are as follows:
`- 1336717 Mole Fraction Point x - y z i 0.03 0.52 0.45 j 0.03 0.45 0.52 k 0.08 0.40 0.52 1 0.33 0.40 0.27 m 0.33 0.41 0.26 n 0.22 0.52 0.26 AsAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of arsenic, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the AsAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 12 hours to about 7 days, have been observed. The product is recovered by any convenient method such as ce`ntrifugation or filtration.
In synthesizing the AsAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (ASxAlyPz)2 bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "x", "y" and "z" represent the mole fractions of arsenic, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
-1~0- 1336717 Mole Fraction Point x ~ y z G 0.01 0.60 0.39 H ~ 0.01 0.39 0.60 I 0.39 0.01 0.60 0.98 0.01 0.01 K 0.39 0.60 0.01 - Especially preferred reaction mixtures are those wherein the mole fractions "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.20 0.55 0.25 b 0.20 0.50 .0~30 c 0.30 0.40 0.30 d 0.40 0.40 0.20 e 0.40 0.50 0.10 f 0.35 0.55 0.10 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that tx + y + z) = 1.00 mole. Molecular sieves containing arsenic, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents AsAPO compositions`may be prepared by using numerous reagents. Reagents which may be employed to prepare AsAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) As2O5, arsenic(V) oxide;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures AsAPOs may be prepared by forming a starting 2S reaction mixture by dissolving the arsenic(V) oxide and the H3PO4 in at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent and the resulting mixture blended until a homogeneous mixture is observed.
The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
BAPO MOLECULAR SIEVES
The BAPO molecular sieves have a framework structure of B02-, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (BXAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BXAlyPz)O2 and has a value of zero to about 0.3, "x", "y" and "z" represent the mole fractions of the elements boron, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B - 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In a preferred subclass of the BAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y Z
a 0.01 0O59 0.40 b 0.01 0.39 0060 c 0.39 0.01 0.60 d 0.59 OoOl 0.40 An especially preferred subclass of the BAPO
molecular sieves are those in which the mole fraction, "x", of boron is not greater than about 0.3.
BAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of boron, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Pèriodic Table, and~or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, - 5 preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous préssure at a temperature between about 50~C
and about 250-C, and preferably between about lOO-C and about 200-C until crystals of the BAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 14 days, and preferably about 1 to about 7 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (BXAlyPz)02 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and is an effective amount preferably within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0; "b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, desirably not greater than about 20, and most desirably ` 1336717 not greater than about 10; and "x", "y" and "z"
represent the mole fractions` of boron, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction lO Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 Especially preferred reaction mixtures are those containing from 0.5 to 2.0 moles of B2O3 and from 0.75 to 1.25 moles of Al2O3 for each mole of P205.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = l.00 mole.
The exact nature of the BAP0 molecular sieves is not entirely understood at present, although all are believed to contain BO2, Al02 and PO2 tetrahedra in the three-dimensional microporous framework structure. The low level of boron present in some of the instant molecular sieves makes it di~fficult to ascertain the exact nature of the interactions among boron, aluminum and phospho~us. As a result, although it is believed that BO2 tetrahedra are present in the three-dimensional microporous framework structure, it is appropriate to characterize certain BAPO compositions in terms of the molar ratios of oxides.
Molecular sieves containing boron, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents BAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) boric acid or trimethylborate;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
~ 1336717 (i) Quin: Quinuclidine, (C7~13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures In the preferred method of synthesizing the BAPO compositions, one first combines sources of boron, aluminum and phosphorus to form an amorphous material containing all three elements, and thereafter heats the amorphous material to produce a crystalline BAPO
molecular sieve. It is not necessary that the total quantities of the reactive sources of boron, aluminum and phosphorus to be used in the final reaction mixture be present in the amorphous material, since additional quantities of the elements can be added during the later heat treatment; i`n particular, it has been found convenient to add additional quantities of phosphorus to the amorphous material before the heat treatment. The preliminary formation of the amorphous material assists in the incorporation of the boron into the final molecular sieve.
For example, BAPOs may be prepared by forming a solution of boric acid in a methanolic solution of the templating agent, then adding a hydrated aluminophosphate and water and stirring to form a homogeneous reaction slurry. This slurry is then placed in a lined (polytetrafluoroethylene) "stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
BeAPO MOLECULAR SIEVES
The BeAPO molecular sieves have a framework structure of BeO2-2, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (BxAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (BXAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements beryllium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
. .
~'~
~ 189- 1 336717 Mole Fraction Point _ y z A O.Ol 0.60 0.39 B O.Ol 0.39 0.60 C 0.39 O.Ol 0.60 D . 0.60 O.Ol 0.39 E 0.60 0.39 O.Ol F 0.39 0.60 O.Ol In a preferred subclass of the BeAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a O.Ol 0.60 0.39 b O.Ol 0.39 0.60 c 0.35 0.05 0.60 d 0.35 0.60 0.05 In an especially preferred subclass of the BeAPO molecular sieves the values of x, y and z are as follows:
Mole Fraction Point x y z e 0.02 0.46 0.52 f OolO 0.38 0052 g OolO 0O46 0.44 ` . 1~3671~
BeAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of beryllium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250C, and preferably between about 100C and about 200-C until crystals of the BeAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of f~om 2 hours to about 30 days, generally from about 4 hours to about 14 days, and preferably about 1 to about 7 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the BeAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (BexAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably`not more than about 1.5;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 50; and "x", "y" and "z" represent the mole fractions of beryllium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 Especially preferred reaction mixtures are those wherein the mole fractions "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction Point x y z g 0.04 0.46 0.50 h 0.16 0.34 0.50 i 0.17 0.34 0.49 j 0.17 0.43 0.40 k 0.14 0.46 0.40 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing beryllium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents BeAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare BeAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) beryllium sulfate:
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7~2NH7 (h) Pr3N: tri-n-propylamine, (C3H7)3N;
(1) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide;
and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures BeAPOs may be prepared by forming a starting reaction mixture by dissolving the beryllium sulfate and the H3PO4 in at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent and the resulting mixture blended until a homogeneous mixture is observed. The mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
CAPO MOLECULAR SIEVES
The CAPO molecular sieves have a framework structure of CrO2n, AlO2- and PO2+
tetrahedral units (where "n" is -1, 0 or +1) and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (CrxAlypz)o2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CrxAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements chromium, aluminum and phosphorus, respectively, present as tetrahedral oxides. When "n" is -1 or +1, the mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.010.60 0.39 B 0.010.39 0.60 C 0.390.01 0.60 D 0.600.01 0.39 E 0.600.39 0.01 F 0.390.60 0.01 A~
l95- 13367I7 When "n" is 0, the mole fractions "x", "y" and "z" are -generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 5 Point x v z G 0.01 0.60 0.39 H 0.01 0.47 0.52 I 0.94 0.01 0.05 J 0.98 0.01 0.01 K 0.39 0.60 0.01 There are three preferred subclasses of the CAPO molecular sieves, depending upon whether the value of "n" is -l, 0 or +1 (i.e. whether the chromium has an oxidation number of 3, 4 or 5), it being understood that mixtures of such are permitted in a given CAPO. When "n" is -1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.01 0.59 0O40 b 0.01 0.39 0.60 c 0.39 0.01 0.60 d 0.59 0.01 0.40 In an especially preferred subclass of these CAPSO molecular sieves in which "n" = -1, the values of x, y and z are as follows:
- . -196- 1336717 Mole Fraction Point x y z n 0.01 0.52 0.47 o 0.01 0.42 0.57 p 0.03 0.40 0.57 q - 0.07 0.40 0.53 r 0.07 0.47 0.46 s 0.02 0.52 0.46 When "n" is 0, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z e 0.01 0.60 0O39 lS f 0.01 0.47 0.52 g 0.50 0.225 0.275 h 0.50 0.40 0.10 i 0.30 0.60 0.10 When "n" is +1, the preferred values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z j 0.01 0.60 0.39 k 0.01 0.40 0.59 1 0.59 0.40 0.01 m - 0.39 0.60 0.10 Since the exact nature of the CAPO molecular sieves is not clearly understood at present, although all are believed to contain CrO2 tetrahedra in the three-dimensional microporous crystal framework structure, it is advantageous to characterize the CAP0 molecular sieves by means of their chemical composition.
This is due to the low level of chromium present in certain of the CAPO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between chromium, aluminum and phosphorus. As a result, although it is believed that CrO2 tetrahedra are substituted isomorphously for A102 or PO2 tetrahedra, it is appropriate to characterize certain CAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
CAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of chromium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50~C
and about 250-C, and preferably between about 100C and about 200-C until crystals of the CAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the CAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (CrxAlyPz)o2 : bH2O
wherein UR" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.6;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 20; and "x", "y" and "z" represent the mole fractions of chromium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z L 0.01 0.60 0.39 M 0.01 0.39 0.60 N 0.39 0.01 0.60 O 0.98 0.01 0.01 P 0.39 0.60 0.01 lS Especially preferred reaction mixtures are those containing from about 0.1 to about 0.4 moles of chromium, and from about 0.75 to about 1.25 moles of aluminum, per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing chromium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents CAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare CAPOs include:
(a) aluminum isopropoxide, or aluminum chlorhydrol;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) chromium(III) orthophosphate, chromium(III) acetate and chromium acetate hydroxide, (Cr3(OH)2(CH3COO)7);
(e) TEAOH: 40 weight percent aqueous solution . of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
2S (m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
- Preparative Procedures CAPOs may be prepared by forming a starting reaction mixture by adding aluminum chlorhydrol or aluminum oxide to a solution of chromium acetate hydroxide in water, then adding successively phosphoric acid and the templating agent. Between each addition, and after formation of the final mixture, the mixture is blended until a homogeneous mixture is observed.
Alternatively, the phosphoric acid may be mixed with at least part of the water, and aluminum oxide or isopropoxide mixed in. A solution of chromium acetate hydroxide is then added, followed by the templating agent, and the resultant mixture mixed until homogeneous.
In a third procedure, amorphous chromium phosphate is ground dry with aluminum oxide and the resultant dry mixture added to an aqueous solution of phosphoric acid in an ice bath. The templating agent is then added, and the final mixture mixed until homogeneous.
Whichever technique is employed to produce the reaction mixture, this mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150-C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GaAPO MOLECULAR SIEVES
The GaAPO molecular sieves have a framework structure of GaO2~, AlO2- and PO2+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (GaxAlypz)o2 wherein ~R~ represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (GaxAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements gallium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
-~203- 1336717 - ~ Mole Fraction Point x ~ y z ~
- A 0.01 0.60 0.39 B - 0.01 0.34 0.65 C 0.34 0.01 0.65 D 0.60 - 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In general, the value of "z" in the GaAP0 molecular sieves is not greater than about 0.60.
In a preferred subclass of the GaAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x y z a 0.01 0.59 0.40 b 0.01 0.34 0.65 c 0.34 0.01 0.65 d O.S9 0.01 0.40 In an especially preferred subclass of the GaAPO molecular sieves the values of x, y and z are as follows:
- Mole Fraction Po-nt x ~ y z e 0.03 0.52 0.45 f 0.03 0.33 0.64 g 0.16 0.20 0.64 h 0.25 0.20 0.5S
i 0.25 0.33 0.42 j 0.06 0.52 0.42 GaAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of gallium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250-C, and preferably between about lOO-C and about 200-C, until crystals of the GaAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 4 hours to about 20 days, and preferably about 1 to about 7 days, have . ~ 205- 1336717 been observed. The product is recovered by any convenient method such as c~ntrifus2tion or filtration.~
In synthesizing the GaAP0 compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (GaxAlyPz)o2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "~" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 1.0;
"b" has a value of from zero (0) to about S00, preferably between about 2 and about 300, most preferably between about 2 and about 20; and "x", "y"
and "zi' represent the mole fractions of gall,ium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
- 13367i7 Mole Fraction Point x- ~ y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 - Especially preferred reaction mixtures are those containing from 0.2 to 0.5 mole of Ga203 and from 0.3 to 1 mole of A1203 for each mole of P205.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole. Molecular sieves containing gallium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reagents Ga~PO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GaAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) gallium sulfate or gallium(III) hydroxide;
_ 07_ 1 33 6 71 7 (e) TEAOH: 40 weight percent aqueous solution of tetraethyl~ammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
S (g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7Hl3N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures GaAPOs may be prepared by forming a starting reaction mixture by mixing the phosphoric acid with at least part of the water. To this solution the aluminum oxide or isopropoxide is added. This mixture is then blended until a homogeneous mixture is observed. To this mixture the gallium sulfate or gallium hydroxide and the templating agent are successively added and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, the aluminum oxide may be mixed with a solution of the gallium sulfate or hydroxide, and then the phosphoric acid and the templating agent successively added. The resulting mixture is then blended until a homogeneous mixture is observed.
In a third process, the templating agent may be dissolved in water, the gallium hydroxide or sulfate added with stirring, a solution of the phosphoric acid added, and finally the aluminum oxide mixed in. The resulting mixture is then blended until a homogeneous mixture is observed.
Whichever technique is employed to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
GeAPO MOLECULAR SIEVES
The GeAPO molecular sieves have a framework structure of GeO2, AlO2- and P02+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (GexAlypz)o2 wherein "R' represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of ~;~.~
. . .,~
(GexAlyPz)02 and has a value of zero to about 0.~3, but is preferably not greater than 0.2: and "x", "y" and "z"
represent the mole fractions of the elements germanium, - aluminum and phosphorus, respectively, present as `5 tetrahedral oxides. The mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.47 O.S2 C 0.94 0.01 0.05 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the GeAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point _ y z a 0.01 0.60 0.39 b 0.01 0.47 0.52 c 0.50 0.225 0.275 d 0.50 0.40 0.10 e 0.30 0.60 0.10 An especially preferred subclass of the GeAP0 molecular sieves are those i~n which the value of "x" is not greater than about 0.13.
GeAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of germanium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50~C
and about 250~C, and preferably between about 100C and about 200C, until crystals of the GeAP0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 1 to about 10 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the GeAPO compositions, it is preferred to employ a reaction mixture composition 5 expressed in terms of the molar ratios as follows:
aR : (GexAlyPz)02 : bH20 - 1~36717 :-211-wherein "R" is an organic templating agent; "a" is the ~
~ amount of organic templating~agent "R" and has a value . of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.6;
"b" has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably between about 10 and about 60; and "x", "y"
and "z" represent the mole fractions of germanium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z F 0.01 0.60 0.39 G 0.01 0.39 0.60 H 0.39 0.01 0060 I 0.98 0.01 OoO1 J 0.39 0.60 0.01 Especially preferred reaction mixtures are those containing from 0.2 to 0.4 mole of GeO2 and from 0.75 to 1.25 mole of Al203 for each mole of P205.
.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z)`= 1.00 mole. Molecular sieves containing S germanium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Pre~arative Reaqents GeAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare GeAPOs include:
(a) aluminum isopropoxide:
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) germanium tetrachloride, germanium ethoxide and germanium dioxide;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (~7H13NCH3OH);
(k) C-hex: cyclohexylamine;
- (l) TMAOH: tetramethylammonium hydroxide; ~ -- (m) TPAOH: tetrapropylammonium hydrorxide; and (n) DEEA: 2-diethylaminoethanol.
Preparative Procedures In some cases, it may be advantageous, when synthesizing the GeA-PO compositions, to first combine sources of germanium and aluminum, to form a mixed germanium/aluminum compound ~this compound being typically a mixed oxide) and thereafter to combine this mixed compound with a source of phosphorus to form the final GeAPO composition. Such mixed oxides may be prepared for example by hydrolyzing aqueous solutions containing germanium tetrachloride and aluminum chlorhydrol, or aluminum tri-sec-butoxide.
GeAPOs may be prepared by forming a starting reaction mixture by mixing the phosphoric acid with at least part of the water. To this solution is added the mixed germanium/aluminum oxide prepared as described above. This mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent is added and the resulting mixture blended until a homogeneous mixture is observed.
Alternatively, to a solution of aluminum isopropoxide may be added germanium ethoxide. The resultant solution may optionally be dried to produce a mixed oxide. To the mixed solution or dried oxide are added successively the phosphoric acid and the templating agent. The resulting mixture is then blended until a homogeneous mixture is observed.
In a third process, a solution is formed by dissolving the phosphoric acid in water, adding aluminum oxide or isopropoxide and mixing thoroughly. To the resultant mixture is added a solution containing the templating agent and germanium dioxide. The resulting mixture is then blended until a homogeneous mixture is observed.
Whichever technique is employed to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
LiAPO MOLECULAR SIEVES
The LiAPO molecular sieves of U.S. Patent No. 4,789,535 have a framework structure of Lio2-3, AlO2+ and PO2+ tetrahedral units and have an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (LiXAlypz)o2 :-215- 1336717 - - wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (LiXAlyPz)O2 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements lithium, aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0O39 E 0.60 0.39 0.01 F 0.39 0.60 0.01 In a preferred subclass of the LiAPo molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
- ~- Mole Fraction Point x -y z a 0.01 0.60 0.39 b 0.01 0.39 0.60 c 0.35 0.05 0.60 d 0.35 0.60 O.OS
In an especially preferred subclass of the LiAP0 molecular sieves the values of x, y and z are within the following limits:
Mole Fraction Point x y z e 0.01 O.S2 0.47 f 0.01 0.47 0.52 g 0.03 0.45 0.52 h 0.10 0.45 0.45 i 0.10 0.49 0.41 j 0.07 O.S2 0.41 LiAPo compositions are generally synthesized by hydrothermal crystallization from a reaction mixture cont~;n;ng reactive sources of lithium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as :,217- 1336717 polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C
and about 250-C, and preferably between about 100C and about 200-C until crystals of the LiAPo product are obtained, usually a period of from several hours to several wee~s. Typical effective times of from 2 hours to about 30 days, generally from about 12 hours to about 5 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the LiAPo compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (LiXAlyPz)O2 : bH2O
wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 2; "b"
has a value of from zero (0) to about 500, preferably between about 2 and about 300, most preferably not greater than about 40; and "x", "y" and "z" represent the mole fractions of lithium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z G 0.01 0.60 0.39 H 0.01 0.39 0.60 I 0.39 0.01 0.60 J 0.98 0.01 0.01 K 0.39 0.60 0.01 In an especially preferred subclass of the reaction mixtures, the values of "x", "y" and "z" are within the limiting compositional values or points as follows:
Mole Fraction 15 Point x Y z l 0.03 O.5o 0.47 m 0.03 0.45 0.52 n 0.08 0.40 0.52 o 0.10 0.40 0.50 q 0.04 0.50 0.46 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole.
Since the exact nature of the LiAPO molecular sieves is not clearly understood at present, although F2l9- 1336717 all are believed to contain Lio2 tetrahedra in the three-dimensional microporo~s crystal framework structure, it is advantageous to characterize the LiAPo molecular sieves by means of their chemical composition.
This is due to the low level of lithium present in certain of the LiAPo molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between lithium, aluminum and phosphorus. As a result, although it is believed that Lio2 tetrahedra are substituted isomorphously for Al02 or P02 tetrahedra, it is appropriate to characterize certain LiAPO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
.Molecular sieves containing lithium, aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Rea~ents LiAPO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare LiAPos include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3P04: 85 weight percent aqueous phosphoric acid;
(d) lithium suifate or lithium orthophosphate;
(e) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
- (h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(l) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
Pre~arative Procedures LiAPos may be prepared by forming a starting reaction mixture by suspending aluminum oxide in at least part of the water. To this mixture the templating agent is added. The resultant mixture is then blended until a homogeneous mixture is observed. To this mixture the lithium phosphate or sulfate is added and the resulting mixture blended until a homogeneous mixture is observed. Alternatively, an initial mixture may be formed by mixing aluminum oxide and lithium phosphate or sulfate. To the resultant mixture are added successively phosphoric acid and an aqueous solution of the templating agent, and the resulting mixture blended until a homogeneous mixture is observed.
In a third procedure, the phosphoric acid is mixed with at least part of the water, and the aluminum oxide is mixed in. To the resultant mixture are added lithium sulfate and the templating agent, and the resulting mixture blended until a homogeneous mixture is observed.
Whichever procedure is adopted to form the reaction mixture, the mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C
or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
FeTiAPO MOLECULAR SIEVES
The FeTiAPO molecular sieves have three-dimensional microporous framework structures of FeO2n, TiO2, AlO2- and P02+ tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (MXAlyPz)o2 ~..
wherein "R" represents at least one o~rganic templating agent present in the intr~c~ystalline pore system; "M"
represents iron and titanium; "m" represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero (0) to about 0.3; and "x", "y" and "z"
represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39. 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the FeTiAP0 molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
~23 1336717 .
Mole Fraction Point x ~ y z a ~0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 -f 0.39 0.60 0.01 FeTiAPO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of iron, titanium, aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50C
and about 250C, and preferably between about 100C and about 200C until crystals of the FeTiAPO product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally-from about 12 hours to about 2S S days, have been observed. The product is recovered by -~ 1336717 any convenient method such as centrifugation or filtration.
In synthesizing the FeTiAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "b" has a value of from zero (0) to about S00, preferably between about 2 and about 300; and "x", "y"
and "z" represent the mole fractions of "M" (iron and titanium, aluminum and phosphorus, respectively, and each has a value of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x v z F 0.02 0.60 0038 G 0.02 0c38 0.60 H 0O39 0.01 0.60 2S I 0.98 0.01 0.01 J 0.39 0.60 0.01 1~36717 In the foregoing expression of the reaction composition, the reactants àre normalized with respect to the total of "x", "y" and "z" such that (x + y + zj = 1.00 mole.
Molecular sieves containing iron, titanium, aluminum and phosphorus as framewor~ tetrahedral oxide units are prépared as follows:
Preparative Reaqents FeTiAPO compositions may be prepared by using numerous reagents. The preferred sources of iron and titanium for preparing FeTiAPOs are the same as those for preparing the FeAPOs and TiAPOs already described above. Other reagents which may be employed to prepare FeTiAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(e) TBAOH: 40 weight percent aqueous solution of tetrabutylammonium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3N: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N):
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(j) C-hex: cycloherylamine;
(k) TMAOH: tetramethylammonium hydroxide;
(1) TPAOH: tetrapropylammonium hydroxide;
and (m) DEEA: 2 -diethylaminoethanol.
Preparative Procedures FeTiAPOs may be prepared by forming a homogeneous reaction mixture containing reactive sources of iron, titanium, aluminum and phosphorus.
The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
XAPO MOLECULAR SIEVES
The XAPO molecular sieves have a three-dimensional microporous framework structures of MO2n, AlO2- and P02+ tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mA : (MXAlypz)o2 ~,,' --2 ? 7--wherein "R" represents at least one organic templating agent present in the intracr~stalline pore system; "M"
represents at least one element from each of the classes of: 1) iron and titanium; and 2) cobalt, magnesium, manganese and zinc; "n" is 0, -1 or -2; "m" represents a molar amount of "R" present per mole of (MXAlyPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0 r 60 D 0.98 0.01 0.01 ~ E 0.39 0.60 0.01 In a preferred subclass of the XAPO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point ~ x ~ y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 -f 0.39 0.60 0.01 XA~O compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or lS optionally an alkali or other metal. The reaction mixture is generally placed in a sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50 C
and about 250-C, and preferably between about lOO~C and about 200-C until crystals of the XAP0 product are obtained, usually a period of from several hours to several wee~s. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 2S 20 days, have been observed. The product is recovered ~ -229- 1336717 by any convenient method such as centrifugation or filtration. ~ ~ f In synthesizing the XAPO compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR (MxAlyPz)2 bH2 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6; "M" represents at least one element from each of the classes of: l) iron and titanium; and 2) cobalt, magnesium, manganese and zinc; "b" has a value of from zero (03 to about S00, preferably between about 2 and about 300; and NX~ y~ and "z" represent the mole fractions of "M" (iron and/or titanium, and at least one of cobalt, magnesium, manganese and zinc), aluminum and phosphorus, respectively, and éach has a value of at least 0.01, with the proviso that "x" has a value of at least 0.02.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
~ ~ Mole Fraction Point ~ y z F 0.02 0.60 0.38 G 0.02 0.38 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z-- such that (x + y + z) = 1.00 mole.
XAPO molecular sieves are prepared as follows:
Prezarative Reagents XAPO compositions may be prepared by using numerous reagents. The preferred sources of elements "M" for preparing XAPOs are the same as those for preparing other APOs containing the same elements, as described above and below. Other reagents which may be employed to prepare XAPOs include:
(a) aluminum isopropoxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
(d) TEAOH: 40 weight percent aqueous solution of tetraethylammonium hydroxide;
(e) TBAOH: 40 weight percent aql ~ 717 solution of tetrabutylammonium hydroxide;
(f) Pr2NH: di-n-propylamine, (C3H7)2NH;
(g) Pr3N: tri-n-propylamine, (C3H7)3N;
(h) Quin: Quinuclidine, (C7H13N);
(i) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH30H);
(j) C-hex: cyclohexylamine;
(k) TMAOH: tetramethylammonium hydroxide;
(1) TPAOH: tetrapropylammonium hydroxide; and (m) DEEA: 2-diethylaminoethanol.
Preparative Procedures XAPOs may be prepared by forming a homogeneous reaction mixture containing reactive sources of elements "M", aluminum and phosphorus. The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C.
Digestions are typically carried out under autogenous pressure.
MIXED-ELEMENT APO MOLECULAR SIEVES
The mixed element APO molecular sieves have a framework structure of MO2n, A102 and P02+
tetrahedral units, ~: `
. -; .~
~-232- 1336717 wherein M02n represents at least two different eiements present as t~trahedral units "M02n" with charge~"n", where "n" may be -3, -2, -1, 0 or +1. One of the elements "M" is selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium, while a second one of the elements "M" is selected from the group consisting of cobalt, iron, magnesium, manganese, titanium and zinc.
Preferably, "M" is a mixture of lithium and magnesium.
The mixed-element molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)02 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (LiXAlyPz)02 and has a value of zero to about 0.3, but is preferably not greater than 0.15; and "x", "y" and "z" represent the mole fractions of the elements "M"
(i.e. "x" is the total of the mole fractions of the two or more elements "M"), aluminum and phosphorus, respectively, present as tetrahedral oxides. The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction 1 3 3 6 717 Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of the mixed-element APO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 0.01 f 0.39 0.60 0.01 An especially preferred subclass of the mixed element APO molecular sieves are those in which the value of x is not greater than about 0.10.
A second group (FCAPO's) of mixed element APO
molecular sieves described in U. S. Patent No.
4,686,093 issued August 11, 1987, have a framework structure of M02n, A102- and P02+ tetrahedral units, wherein MO2n represents at least two different elements which are present as tetrahedral units "M02n" with charge "nU, where "n" may be -3, -2, -1, 0 or +1 and which are selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium. These mixed-element molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:
mR : (MxAlyPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m"
represents the molar amount of "R" present per mole of (MXAlyPz)02 and has a value of zero to about 0.3; and "x", "y" and "z" represent the mole fractions of the elements "M" (i.e. "x" is the total of the mole fractions of the two or more elements "M"), aluminum and phosphorus, respectively, present as tetrahedral oxides.
The mole fractions "x", "y" and "z" are generally defined as being within the limiting compositional values or points as follows:
.
- - Mole-Fraction Point x - y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01 In a preferred subclass of these mixed-element APO molecular sieves the values of x, y and z are within the limiting compositional values or points as follows:
Mole Fraction Point x y z a 0.02 0.60 0.38 b 0.02 0.38 0.60 c 0.39 0.01 0.60 d 0.60 0.01 0.39 e 0.60 0.39 OoOl f 0.39 0.60 0.01 The mixed-element APO compositions are generally synthesized by hydrothermal crystallization from a reaction mixture containing reactive sources of the elements "M", aluminum and phosphorus, preferably an organic templating, i.e., structure-directing, agent, preferably a compound of an element of Group VA of the Periodic Table, and/or optionally an alkali or other metal. The reaction mixture is generally placed in a ` - 36- 1336717 - sealed pressure vessel, preferably lined with an inert plastic material such as polytetrafluoroethylene and heated, preferably under autogenous pressure at a temperature between about 50-C and about 250-C, and preferably between about lOO C and about 200-C until crystals of the AP0 product are obtained, usually a period of from several hours to several weeks. Typical effective times of from 2 hours to about 30 days, generally from about 2 hours to about 20 days, and preferably about 12 hours to about 5 days, have been observed. The product is recovered by any convenient method such as centrifugation or filtration.
In synthesizing the mixed-element APO
compositions, it is preferred to employ a reaction mixture composition expressed in terms of the molar ratios as follows:
aR : (MXAlyPz)O2 : bH20 wherein "R" is an organic templating agent; "a" is the amount of organic templating agent "R" and has a value of from zero to about 6 and is preferably an effective amount within the range of greater than zero (0) to about 6, and most preferably not more than about 0.5;
"b" has a value of from zero (0) to about S00, preferably between about 2 and about 300, most 2S preferably not greater than about 20, and most desirably not more than about 10; and "x", "y" and "z" represent ~-237-- the mole fractions of "M", aluminum and phosphorus, respectively, "y" and "z" each having a value of at least 0.01 and "x" having a value of at least 0.02, with each element "M" having a mole fraction of at least 0.01.
In one embodiment the reaction mixture is selected such that the mole fractions "x", "y" and "z"
are generally defined as being within the limiting compositional values or points as follows:
Mole Fraction Point x y z F 0.02 0.60 0.38 G 0.02 0.38 0.60 H 0.39 0.01 0.60 I 0.98 0.01 0.01 J 0.39 0.60 0.01 Preferred reaction mixtures are those cont~;ning not more than about 0.2 moles of the metals "M" per mole of phosphorus.
In the foregoing expression of the reaction composition, the reactants are normalized with respect to the total of "x", "y" and "z" such that (x + y + z) = 1.00 mole.
Since the exact nature of the mixed-element APO molecular sieves is not clearly understood at present, although all are believed to contain M02 - 23~- 1336717 tetrahedra in the three-dimensional microporous crystal framework structure, it is -advantaseous to characterize the mixed-element APO molecular sieves by means of their chemical composition. This is due to the low level of the elements "M" present in certain of the mixed-element APO molecular sieves prepared to date which makes it difficult to ascertain the exact nature of the interaction between the metals "M", aluminum and phosphorus. As a result, although it is believed that MO2 tetrahedra are substituted isomorphously for A102 or PO2 tetrahedra, it is appropriate to characterize certain mixed-element APO compositions by reference to their chemical composition in terms of the mole ratios of oxides.
Molecular sieves containing the metals "M", aluminum and phosphorus as framework tetrahedral oxide units are prepared as follows:
Preparative Reaqents Mixed-element APO compositions may be prepared by using numerous reagents. Reagents which may be employed to prepare mixed-element APOs include:
(a) aluminum isopropcxide;
(b) pseudoboehmite or other aluminum oxide;
(c) H3PO4: 85 weight percent aqueous phosphoric acid;
~d) lithium phosphate or magnesium hydroxide - 1~36717 or appropriate salts of the other elements "M",~as described akove;
(e) TEAOH: 40 weight percent aqueous solution - of tetraethylammonium hydroxide;
(f) TBAOH: 40 weight percent aqueous solution . of tetrabutylammonium hydroxide;
(g) Pr2NH: di-n-propylamine, (C3H7)2NH;
(h) Pr3N: tri-n-propylamine, (C3H7)3N;
(i) Quin: Quinuclidine, (C7H13N);
(j) MQuin: Methyl Quinuclidine hydroxide, (C7H13NCH3OH);
(k) C-hex: cyclohexylamine;
(1) TMAOH: tetramethylammonium hydroxide;
(m) TPAOH: tetrapropylammonium hydroxide; and (n) DEEA: 2-diethylaminoethanol.
PreDarative Procedures Mixed element APOs may be prepared by forming a starting reaction mixture by mixing aluminum oxide, magnesium hydroxide, lithium phosphate (or the corresponding salts of the other elements "M"). To this mixture the phosphoric acid is added. The resultant mixture is then blended until a homogeneous mixture is observed. To this mixture the templating agent is added and the resulting mixture blended until a homogeneous mixture is observed.
- The reaction mixture is then placed in a lined (polytetrafluoroethylene) stainless steel pressure vessel and digested at a temperature (150C or 200C) for a time or placed in lined screw top bottles for digestion at 100C. Digestions are typically carried out under autogenous pressure.
Claims (53)
1. A process for the conversion of a hydroxyalkylamine starting material to at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine, which process comprises contacting the starting material with a non-zeolitic molecular sieve, the contacting of thestarting material with the molecular sieve being effected under conditions effective to convert the starting material into at least one of a cyclic or acyclic amine, a different cyclic or acyclic hydroxyalkylamine and an aziridine.
2. A process according to claim 1 wherein the non-zeolitic molecular sieve comprises an aluminophosphate molecular sieve.
3. A process according to claim 2 wherein the aluminophosphate molecular sieve comprises at least one of A1PO4-5, A1PO4-11, A1PO4-14, A1PO4-17 and A1PO4-31.
4. A process according to claim 2 wherein the molecular sieve comprises at least one of MgAPO-11, MgAPO-34, MgAPO-35 and CoAPO-34.
5. A process according to claim 2 wherein the molecular sieve comprises FeAPO-11.
6. A process according to claim 2 wherein the non-zeolitic molecular sieve has a three-dimensional microporous framework structure containing tetrahedral oxide units of aluminum, phosphorus and at least one element "M" selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium and lithium, subject to the proviso that, when "M"
7. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of AsO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (AsxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (AsxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of arsenic, aluminum and phosphorous, respectively,present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, said points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x Y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
mR: (AsxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (AsxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of arsenic, aluminum and phosphorous, respectively,present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, said points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x Y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
8. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of BO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (BxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z" represent the mole fractions of boron, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing thefollowing values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
mR: (BxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z" represent the mole fractions of boron, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing thefollowing values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
9. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of BeO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (BexA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BexA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of beryllium, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
mR: (BexA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BexA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of beryllium, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
10. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of CrO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (CrxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (CrxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of chromium, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01.
mR: (CrxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (CrxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of chromium, aluminum and phosphorous, respectively, present as tetrahedral oxides and each have a value of at least 0.01.
11. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of GaO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basisexpressed by the formula:
mR: (GaxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GaxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of gallium, aluminum and phosphorus, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.34 0.65 C 0.34 0.01 0.65 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
mR: (GaxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GaxA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of gallium, aluminum and phosphorus, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E
and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.34 0.65 C 0.34 0.01 0.65 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
12. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of GeO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (GexA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GexA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of germanium, aluminum and phosphorus, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E
representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.47 0.52 C 0.94 0.01 0.05 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
mR: (GexA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GexA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z"
represent the mole fractions of germanium, aluminum and phosphorus, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E
representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.47 0.52 C 0.94 0.01 0.05 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
13. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of LiO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (LixA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (LixA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z" represent the mole fractions of lithium, aluminum and phosphorus, respectively, present astetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
mR: (LixA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (LixA1yPz)O2 and has a value of zero to 0.3; and "x", "y" and "z" represent the mole fractions of lithium, aluminum and phosphorus, respectively, present astetrahedral oxides and each have a value of at least 0.01, the mole fractions "x", "y" and "z" being such that they are within the hexagonal compositional area defined by points A, B, C, D, E and F, the points A, B, C, D, E and F representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.01 0.60 0.39 B 0.01 0.39 0.60 C 0.39 0.01 0.60 D 0.60 0.01 0.39 E 0.60 0.39 0.01 F 0.39 0.60 0.01.
14. A process according to claim 6 wherein the non-zeolitic molecular sieve comprises an aluminophosphate molecular sieve as claimed in U.S.Patent 4,686,093.
15. A process according to claim 6 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of MO2, A1O2 and PO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (MxA1yPz)O2 and has a value of zero to 0.3; "M" represents at least two elements capable of forming tetrahedral oxide units and comprises at least one element selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium and at least one element selected from the group consisting of cobalt, iron, magnesium, manganese, titanium and zinc;
"x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, and are within the pentagonal compositional area defined by pointsA, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (MxA1yPz)O2 and has a value of zero to 0.3; "M" represents at least two elements capable of forming tetrahedral oxide units and comprises at least one element selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium and at least one element selected from the group consisting of cobalt, iron, magnesium, manganese, titanium and zinc;
"x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, and are within the pentagonal compositional area defined by pointsA, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
16. A process according to claim 2 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of FeO2, TiO2, A1O2 and PO2 tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "M" represents iron and titanium; "m" represents the molar amount of "R" present per mole of (MxA1yPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z" represent the mole fractions of "M", aluminumand phosphorus, respectively, present as tetrahedral oxides, said mole fractionsbeing such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "M" represents iron and titanium; "m" represents the molar amount of "R" present per mole of (MxA1yPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z" represent the mole fractions of "M", aluminumand phosphorus, respectively, present as tetrahedral oxides, said mole fractionsbeing such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
17. A process according to claim 2 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of MO2n, A1O2, and PO2 tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "M" represents at least one element from each of the classes of: 1) iron and titanium; and 2) cobalt, magnesium, manganese and zinc;
"n" is 0, -1 or -2; "m" represents a molar amount of "R" present per mole of (MxA1yPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z"
represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
mR: (MxA1yPz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "M" represents at least one element from each of the classes of: 1) iron and titanium; and 2) cobalt, magnesium, manganese and zinc;
"n" is 0, -1 or -2; "m" represents a molar amount of "R" present per mole of (MxA1yPz)O2 and has a value of zero (0) to about 0.3; and "x", "y" and "z"
represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, the points A, B, C, D and E representing the following values for "x", "y" and "z":
Mole Fraction Point x y z A 0.02 0.60 0.38 B 0.02 0.38 0.60 C 0.39 0.01 0.60 D 0.98 0.01 0.01 E 0.39 0.60 0.01.
18. A process according to claim 1 wherein the non-zeolitic molecular sieve comprises a silicoaluminophosphate molecular sieve.
19. A process according to claim 18 wherein the silicoaluminophosphate molecular sieve comprises any one or more of SAPO-5 and SAPO-34.
20. A process according to claim 18 wherein the non-zeolitic molecular sieve has a three-dimensional microporous framework structure containing tetrahedral oxide units of silicon, aluminum, phosphorus and at least one element selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium and zinc.
21. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of TiO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (TiwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (TiwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B,C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (TiwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (TiwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of titanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B,C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
22. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of MgO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MgwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MgwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.39 0.59 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (MgwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MgwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.39 0.59 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
23. A process according to claim 22 wherein the molecular sieve comprises MgAPSO-34.
24. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of CoO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (CowA1xPySiz)O2 wherein "R represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CowA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (CowA1xPySiz)O2 wherein "R represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CowA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
25. A process according to claim 24 wherein the molecular sieve comprises CoAPSO-34.
26. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of ZnO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (ZnwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ZnwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (ZnwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ZnwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z" represent the mole fractions of zinc, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
27. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of MO2n, A1O2-, PO2+ and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MwA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M represents at least two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", "x", "y" and "z" represent the mole fractions of M, aluminum, phoshorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (MwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MwA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M represents at least two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", "x", "y" and "z" represent the mole fractions of M, aluminum, phoshorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
28. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of M'O2, M"O2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical compositionon an anhydrous basis expressed by the formula:
mR: (M'uM"vA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (M'uM"vA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M' and M" are two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "u", "v", "x", "y" and "z", where "w" is the sum of "u" +
"v", represent the mole fractions of M', M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and are within the pentagonal compositional area defined by points A, B, C, D, and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z" (where w = u + v):
Mole Fraction Point x y (z + w) A 0.60 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (M'uM"vA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (M'uM"vA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M' and M" are two elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "u", "v", "x", "y" and "z", where "w" is the sum of "u" +
"v", represent the mole fractions of M', M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and are within the pentagonal compositional area defined by points A, B, C, D, and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z" (where w = u + v):
Mole Fraction Point x y (z + w) A 0.60 0.37 0.03 B 0.37 0.60 0.03 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
29. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of CoO2, MnO2, MgO2, A1O2, PO2 and SiO2 tetrahedral oxide units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (CotMnuMgvA1xPySiz)O12 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CotMnuMgvA1xPySiz)O12 and has a value of from zero (0) to about 0.3; "t", "u", and "v", "x", "y" and "z" represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01; "w" = t + u + v; and "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z" (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (CotMnuMgvA1xPySiz)O12 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (CotMnuMgvA1xPySiz)O12 and has a value of from zero (0) to about 0.3; "t", "u", and "v", "x", "y" and "z" represent the mole fractions of cobalt, manganese, magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each has a value of at least 0.01; "w" = t + u + v; and "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z" (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
30. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of MO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (MwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MwA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M represents three elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", "x", "y" and "z" (where "w" is the sum of the individual mole fractions "t", "u" and "v" of said three selected elements) represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, wherein "t", "u", "v", "x", "y" and "z" are at least 0.01 and are such that they are within the pentagonal compositional area defined by points A, B, C, D, and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z" (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (MwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (MwA1xPySiz)O2 and has a value of from zero (0) to about 0.3; M represents three elements selected from the group consisting of arsenic, beryllium, boron, chromium, cobalt, gallium, germanium, iron, lithium, magnesium, manganese, titanium, vanadium and zinc; and "w", "x", "y" and "z" (where "w" is the sum of the individual mole fractions "t", "u" and "v" of said three selected elements) represent the mole fractions of elements "M", aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides, wherein "t", "u", "v", "x", "y" and "z" are at least 0.01 and are such that they are within the pentagonal compositional area defined by points A, B, C, D, and E, said points A, B, C, D and E
representing the following values for "w", "x", "y" and "z" (where w = t + u + v):
Mole Fraction Point x y (z + w) A 0.60 0.36 0.04 B 0.36 0.60 0.04 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
31. A process according to claim 20 wherein the non-zeolotic molecular sieve has three-dimensional microporous framework structures of ELO2, A1O2, PO2, SiO2 oxide units and having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (ELwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwA1xPySiz)O2 and has a value of zero to about 0.3;
"EL" represents at least one element capable of forming a three dimensional oxide framework, "EL" is characterized as an element having a mean "T-O" distance in tetrahedral oxide structures between about 1.51 Angstroms and about 2.06 Angstroms, "EL" has a cation electronegativity between about 125 kcal/g-atom to about 310 kcal/g-atom and "EL" is capable of forming stable M-O-P, M-O-A1 or M-O-M bonds in crystalline three dimensional oxide structures having an "M-O" bond dissociationenergy greater than about 59 kcal/mole at 298°C; and "w", "x", "y" and "z"
represent the mole fractions of "EL", aluminum, phosphorus, and silicon, respectively, present as framework oxides, and each of aluminum, phosphorus and silicon are present such that "w", "x", "y" and "z" are at least 0.01, said molefractions being within the pentagonal compositional area defined by points A, B,C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.39-0.01 p 0.01 (p + 1) B 0.39-(0.01 p) 0.60 0.01 (p + 1) C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39, where "p" is an integer corresponding to the number of elements "EL" in the (ELwA1xPySiz)O2 constituent.
mR: (ELwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R"
present per mole of (ELwA1xPySiz)O2 and has a value of zero to about 0.3;
"EL" represents at least one element capable of forming a three dimensional oxide framework, "EL" is characterized as an element having a mean "T-O" distance in tetrahedral oxide structures between about 1.51 Angstroms and about 2.06 Angstroms, "EL" has a cation electronegativity between about 125 kcal/g-atom to about 310 kcal/g-atom and "EL" is capable of forming stable M-O-P, M-O-A1 or M-O-M bonds in crystalline three dimensional oxide structures having an "M-O" bond dissociationenergy greater than about 59 kcal/mole at 298°C; and "w", "x", "y" and "z"
represent the mole fractions of "EL", aluminum, phosphorus, and silicon, respectively, present as framework oxides, and each of aluminum, phosphorus and silicon are present such that "w", "x", "y" and "z" are at least 0.01, said molefractions being within the pentagonal compositional area defined by points A, B,C, D and E, said points A, B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.39-0.01 p 0.01 (p + 1) B 0.39-(0.01 p) 0.60 0.01 (p + 1) C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39, where "p" is an integer corresponding to the number of elements "EL" in the (ELwA1xPySiz)O2 constituent.
32. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of AsO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (AswA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (AswA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of arsenic, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98.
E 0.60 0.01 0.39
mR: (AswA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (AswA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of arsenic, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98.
E 0.60 0.01 0.39
33. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of BO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (BwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"represent the mole fractions of boron, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (BwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"represent the mole fractions of boron, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
34. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of BeO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (BewA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BewA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of beryllium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (BewA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (BewA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of beryllium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
35. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of CrO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (CrwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (CrwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of chromium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (CrwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (CrwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of chromium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
36. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of GaO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (GawA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GawA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of gallium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (GawA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GawA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of gallium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
37. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of GeO2, A1O2, PO2 and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (GewA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GewA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of germanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
mR: (GewA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (GewA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of germanium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39
38. A process according to claim 20 wherein the non-zeolitic molecular sieve has three-dimensional microporous framework structures of I1OA2, A1O2, PO2and SiO2 tetrahedral units having an empirical chemical composition on an anhydrous basis expressed by the formula:
mR: (LiwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (LiwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of lithium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
mR: (LiwA1xPySiz)O2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present permole of (LiwA1xPySiz)O2 and has a value of zero to 0.3; and "w", "x", "y" and "z"
represent the mole fractions of lithium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides and each have a value of at least 0.01, the mole fractions "w", "x", "y" and "z" being such that they are within the pentagonal compositional area defined by points A, B, C, D and E, said points A,B, C, D and E representing the following values for "w", "x", "y" and "z":
Mole Fraction Point x y (z + w) A 0.60 0.38 0.02 B 0.38 0.60 0.02 C 0.01 0.60 0.39 D 0.01 0.01 0.98 E 0.60 0.01 0.39.
39. A process according to claim 1 wherein the starting material is monoethanolamine and the products include ethylenimine.
40. A process according to claim 1 wherein the starting material is propanolamine and the products include propylenimine.
41. A process according to claim 1 which is carried out at a temperature of about 250°C to about 500°C.
42. A process according to claim 1 which is carried out a temperature of about 350°C to about 425°C.
43. A process according to claim 1 which is carried out at a pressure of from about atmospheric to about 1000 psig.
44. A process according to claim 1 wherein the starting material is in the gaseous phase while being contacted with the molecular sieve.
45. A process according to claim 44 wherein the starting material is mixed with a carrier gas while being contacted with the molecular sieve.
46. A process according to claim 45 wherein the carrier gas is nitrogen or ammonia.
47. A process according to claim 43 wherein the amine comprises from about 1 to about 95 mole percent of the total feed of starting material andcarrier gas.
48. A process according to claim 47 wherein the amine comprises from about 9 to about 30 mole percent of the total feed of starting material andinert carrier gas.
49. A process according to claim 1 which is carried out at a weight hourly space velocity, based on the starting material, of from about 0.1 to about
50.
50. A process according to claim 49 which is carried out at a weight hourly space velocity, based on the starting material, of from about 0.5 to about 10.
50. A process according to claim 49 which is carried out at a weight hourly space velocity, based on the starting material, of from about 0.5 to about 10.
51. A process according to claim 1 which is carried out at a conversion of at least about 30%.
52. A process for the conversion of monoethanolamine to at least one of ethylenimine, piperazine, a substituted piperazine, pyrazine, aminoethanolamine, diethanolamine, ethylenediamine, a substituted ethyleneamine, ethylamine, acetonitrile and morpholine, which process comprises contacting the monoethanolamine with a non-zeolitic molecular sieve, the contacting of the monoethanolamine with the molecular sieve being effected under conditions effective to convert the monoethanolamine into at least one of said products.
53. A process according to claim 52 wherein the non-zeolitic molecular sieve comprises an aluminophosphate or silicoaluminophosphate molecular sieve.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/134,863 US5120860A (en) | 1987-12-18 | 1987-12-18 | Process for the production of aziridines |
DE3851327T DE3851327T2 (en) | 1987-12-18 | 1988-12-16 | METHOD FOR PRODUCING AMINES, HYDROXYAMINES AND AZIRIDINES. |
EP89901223A EP0346443B1 (en) | 1987-12-18 | 1988-12-16 | Process for the production of amines, hydroxyamines and aziridines |
PCT/US1988/004456 WO1989005797A2 (en) | 1987-12-18 | 1988-12-16 | Process for the production of aziridines |
EP89901980A EP0358736A1 (en) | 1987-12-18 | 1988-12-16 | Process for the production of aziridines |
PCT/US1988/004455 WO1989006229A1 (en) | 1987-12-18 | 1988-12-16 | Process for the production of amines, hydroxyamines and aziridines |
CA000586709A CA1336717C (en) | 1987-12-18 | 1988-12-21 | Process for the production of amines, hydroxyamines and aziridines |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/134,863 US5120860A (en) | 1987-12-18 | 1987-12-18 | Process for the production of aziridines |
PCT/US1988/004455 WO1989006229A1 (en) | 1987-12-18 | 1988-12-16 | Process for the production of amines, hydroxyamines and aziridines |
CA000586709A CA1336717C (en) | 1987-12-18 | 1988-12-21 | Process for the production of amines, hydroxyamines and aziridines |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1336717C true CA1336717C (en) | 1995-08-15 |
Family
ID=25672327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000586709A Expired - Fee Related CA1336717C (en) | 1987-12-18 | 1988-12-21 | Process for the production of amines, hydroxyamines and aziridines |
Country Status (1)
Country | Link |
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CA (1) | CA1336717C (en) |
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1988
- 1988-12-21 CA CA000586709A patent/CA1336717C/en not_active Expired - Fee Related
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