EP1409402A2 - Zeolith ssz-59 - Google Patents

Zeolith ssz-59

Info

Publication number
EP1409402A2
EP1409402A2 EP02748044A EP02748044A EP1409402A2 EP 1409402 A2 EP1409402 A2 EP 1409402A2 EP 02748044 A EP02748044 A EP 02748044A EP 02748044 A EP02748044 A EP 02748044A EP 1409402 A2 EP1409402 A2 EP 1409402A2
Authority
EP
European Patent Office
Prior art keywords
methyl
zeolite
catalyst
cation
oxide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02748044A
Other languages
English (en)
French (fr)
Other versions
EP1409402A4 (de
Inventor
Saleh Elomari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chevron USA Inc
Original Assignee
Chevron USA Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/905,353 external-priority patent/US6461578B1/en
Priority claimed from US09/905,351 external-priority patent/US6547958B1/en
Priority claimed from US09/905,461 external-priority patent/US6464956B1/en
Application filed by Chevron USA Inc filed Critical Chevron USA Inc
Publication of EP1409402A2 publication Critical patent/EP1409402A2/de
Publication of EP1409402A4 publication Critical patent/EP1409402A4/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/74—Noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/86—Borosilicates; Aluminoborosilicates
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    • C01—INORGANIC CHEMISTRY
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    • C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
    • C01B39/06—Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements, i.e. by direct or secondary synthesis
    • C01B39/12—Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements, i.e. by direct or secondary synthesis the replacing atoms being at least boron atoms
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    • C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
    • C01B39/46—Other types characterised by their X-ray diffraction pattern and their defined composition
    • C01B39/48—Other types characterised by their X-ray diffraction pattern and their defined composition using at least one organic template directing agent
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    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
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    • C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
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    • C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/42—Catalytic treatment
    • C10G3/44—Catalytic treatment characterised by the catalyst used
    • C10G3/48—Catalytic treatment characterised by the catalyst used further characterised by the catalyst support
    • C10G3/49—Catalytic treatment characterised by the catalyst used further characterised by the catalyst support containing crystalline aluminosilicates, e.g. molecular sieves
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    • C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/50—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids in the presence of hydrogen, hydrogen donors or hydrogen generating compounds
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    • C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/58—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins
    • C10G45/60—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins characterised by the catalyst used
    • C10G45/64—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
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    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
    • C10G47/10—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used with catalysts deposited on a carrier
    • C10G47/12—Inorganic carriers
    • C10G47/16—Crystalline alumino-silicate carriers
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    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
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    • B01J29/89—Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
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    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
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    • C10G2300/1092—C2-C4 olefins
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    • C10G2300/20—Characteristics of the feedstock or the products
    • C10G2300/30—Physical properties of feedstocks or products
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    • C10G2400/02—Gasoline
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Definitions

  • the present invention relates to new crystalline zeolite SSZ-59 and a method for preparing SSZ-59 using a N-methyl-N-[(l - phenylcyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N-[(l- phenylcyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-((l- phenylcyclopentyl)methyl]piperidinium cation or N-methyl-N-[( 1 -(4- chlorophenyl)cyclopentyl
  • Crystalline aluminosilicates are usually prepared from aqueous reaction mixtures containing alkali or alkaline earth metal oxides, silica, and alumina. Crystalline borosilicates are usually prepared under similar reaction conditions except that boron is used in place of aluminum.
  • zeolites By varying the synthesis conditions and the composition of the reaction mixture, different zeolites can often be formed.
  • SSZ-59 a family of crystalline molecular sieves with unique properties, referred to herein as "zeolite SSZ-59" or simply "SSZ-59".
  • SSZ-59 is obtained in its silicate, aluminosilicate, titanosilicate, vanadosilicate or borosilicate form.
  • silicate refers to a zeolite having a high mole ratio of silicon oxide relative to aluminum oxide, preferably a mole ratio greater than 100, including zeolites comprised entirely of silicon oxide.
  • aluminosilicate refers to a zeolite containing both alumina and silica and the term “borosilicate” refers to a zeolite containing oxides of both boron and silicon.
  • a zeolite having a mole ratio greater than about 20 of an oxide of a first tetravalent element to an oxide of a second tetravalent element different from said first tetravalent element, trivalent element, pentavalent element or mixture thereof and having, after calcination, the X-ray diffraction lines of Table II.
  • a zeolite having a mole ratio greater than about 20 of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide, titanium oxide, indium oxide, vanadium oxide and mixtures thereof and having, after calcination, the X-ray diffraction lines of Table II below.
  • the present invention further provides such a zeolite having a composition, as synthesized and in the anhydrous state, in terms of mole ratios as follows: YO 2 /W c O d 20 - 150 M 2 n /YO 2 0.01 - 0.03 Q/YO 2 0.02 - 0.05 wherein Y is silicon, germanium or a mixture thereof; W is aluminum, gallium, iron, boron, titanium, indium, vanadium or mixtures thereof; c is 1 or 2; d is 2 when c is 1 (i.e., W is tetravalent) or d is 3 or 5 when c is 2 (i.e., d is 3 when W is trivalent or 5 when W is pentavalent); M is an alkali metal cation, alkaline earth metal cation or mixtures thereof; n is the valence of M (i.e., 1 or 2); and Q is a N-methyl-N-[(l- phenylcyclopent
  • a zeolite prepared by thermally treating a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide, titanium oxide, indium oxide, vanadium oxide and mixtures thereof greater than about 20 at a temperature of from about 200°C to about 800°C, the thus-prepared zeolite having the X-ray diffraction lines of Table II.
  • the present invention also includes this thus-prepared zeolite which is predominantly in the hydrogen form, which hydrogen form is prepared by ion exchanging with an acid or with a solution of an ammonium salt followed by a second calcination.
  • Also provided in accordance with the present invention is a method of preparing a crystalline material comprising an oxide of a first tetravalent element and an oxide of a second tetravalent element which is different from said first tetravalent element, trivalent element, pentavalent element or mixture thereof, said method comprising contacting under crystallization conditions sources of said oxides and a templating agent comprising a N-methyl-N-[(l -phenylcyclopentyl)methyl]heptamethyleneiminium cation, N-methyl- N-[(l-(4-chlorophenyl)cyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N- [(l-phenylcyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-((l -
  • the present invention provides a process for converting hydrocarbons comprising contacting a hydrocarbonaceous feed at hydrocarbon converting conditions with a catalyst comprising the zeolite of this invention.
  • the zeolite may be predominantly in the hydrogen form. It may also be substantially free of acidity.
  • a hydrocracking process comprising contacting a hydrocarbon feedstock under hydrocracking conditions with a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • This invention also includes a dewaxing process comprising contacting a hydrocarbon feedstock under dewaxing conditions with a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the present invention also includes a process for improving the viscosity index of a dewaxed product of waxy hydrocarbon feeds comprising contacting the waxy hydrocarbon feed under isomerization dewaxing conditions with a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the present invention further includes a process for producing a C 20+ lube oil from a C 0+ olefin feed comprising isomerizing said olefin feed under isomerization conditions over a catalyst comprising at least one Group Vffl metal and the zeolite of this invention.
  • the zeolite may be predominantly in the hydrogen form.
  • a process for catalytically dewaxing a hydrocarbon oil feedstock boiling above about 350°F and containing straight chain and slightly branched chain hydrocarbons comprising contacting said hydrocarbon oil feedstock in the presence of added hydrogen gas at a hydrogen pressure of about 15-3000 psi with a catalyst comprising at least one Group VIII metal and the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the catalyst may be a layered catalyst comprising a first layer comprising at least one Group VIII metal and the zeolite of this invention, and a second layer comprising an aluminosilicate zeolite which is more shape selective than the zeolite of said first layer.
  • Also included in the present invention is a process for preparing a lubricating oil which comprises hydrocracking in a hydrocracking zone a hydrocarbonaceous feedstock to obtain an effluent comprising a hydrocracked oil, and catalytically dewaxing said effluent comprising hydrocracked oil at a temperature of at least about 400°F and at a pressure of from about 15 psig to about 3000 psig in the presence of added hydrogen gas with a catalyst comprising at least one Group VIII metal and the zeolite of this invention.
  • the zeolite may be predominantly in the hydrogen form.
  • a process for isomerization dewaxing a raffinate comprising contacting said raffinate in the presence of added hydrogen with a catalyst comprising at least one Group VIII metal and the zeolite of this invention.
  • the raffinate may be bright stock, and the zeolite may be predominantly in the hydrogen form.
  • Also included in this invention is a process for increasing the octane of a hydrocarbon feedstock to produce a product having an increased aromatics content
  • a hydrocarbonaceous feedstock which comprises normal and slightly branched hydrocarbons having a boiling range above about 40°C and less than about 200°C, under aromatic conversion conditions with a catalyst comprising the zeolite of this invention made substantially free of acidity by neutralizing said zeolite with a basic metal.
  • a catalyst comprising the zeolite of this invention made substantially free of acidity by neutralizing said zeolite with a basic metal.
  • the zeolite contains a Group VIII metal component.
  • a catalytic cracking process comprising contacting a hydrocarbon feedstock in a reaction zone under catalytic cracking conditions in the absence of added hydrogen with a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form. Also included in this invention is such a catalytic cracking process wherein the catalyst additionally comprises a large pore crystalline cracking component.
  • This invention further provides an isomerization process for isomerizing C 4 to C 7 hydrocarbons, comprising contacting a feed having normal and slightly branched C 4 to C 7 hydrocarbons under isomerizing conditions with a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the zeolite may be impregnated with at least one Group VIII metal, preferably platinum.
  • the catalyst may be calcined in a steam/air mixture at an elevated temperature after impregnation of the Group VIII metal.
  • a process for alkylating an aromatic hydrocarbon which comprises contacting under alkylation conditions at least a molar excess of an aromatic hydrocarbon with a C 2 to C 0 olefin under at least partial liquid phase conditions and in the presence of a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the olefin may be a C 2 to C 4 olefin, and the aromatic hydrocarbon and olefin may be present in a molar ratio of about 4: 1 to about 20: 1, respectively.
  • the aromatic hydrocarbon may be selected from the group consisting of benzene, toluene, ethylbenzene, xylene, naphthalene, naphthalene derivatives such as dimethylnaphthalene or mixtures thereof.
  • a process for transalkylating an aromatic hydrocarbon which comprises contacting under transalkylating conditions an aromatic hydrocarbon with a polyalkyl aromatic hydrocarbon under at least partial liquid phase conditions and in the presence of a catalyst comprising the zeolite of this invention, preferably predominantly in the hydrogen form.
  • the aromatic hydrocarbon and the polyalkyl aromatic hydrocarbon may be present in a molar ratio of from about 1 : 1 to about 25:1, respectively.
  • the aromatic hydrocarbon may be selected from the group consisting of benzene, toluene, ethylbenzene, xylene, or mixtures thereof, and the polyalkyl aromatic hydrocarbon may be a dialkylbenzene.
  • this invention is a process to convert paraffins to aromatics which comprises contacting paraffins under conditions which cause paraffins to convert to aromatics with a catalyst comprising the zeolite of this invention, said catalyst comprising gallium, zinc, or a compound of gallium or zinc.
  • a process for isomerizing olefins comprising contacting said olefin under conditions which cause isomerization of the olefin with a catalyst comprising the zeolite of this invention.
  • a process for isomerizing an isomerization feed comprising an aromatic C 8 stream of xylene isomers or mixtures of xylene isomers and ethylbenzene, wherein a more nearly equilibrium ratio of ortho-, meta- and para-xylenes is obtained, said process comprising contacting said feed under isomerization conditions with a catalyst comprising the zeolite of this invention.
  • the present invention further provides a process for oligomerizing olefins comprising contacting an olefin feed under oligomerization conditions with a catalyst comprising the zeolite of this invention.
  • This invention also provides a process for converting lower alcohols and other oxygenated hydrocarbons comprising contacting said lower alcohol or other oxygenated hydrocarbon with a catalyst comprising the zeolite of this invention under conditions to produce liquid products.
  • a process for the production of higher molecular weight hydrocarbons from lower molecular weight hydrocarbons comprising the steps of: (a) introducing into a reaction zone a lower molecular weight hydrocarbon- containing gas and contacting said gas in said zone under C 2+ hydrocarbon synthesis conditions with the catalyst and a metal or metal compound capable of converting the lower molecular weight hydrocarbon to a higher molecular weight hydrocarbon; and (b) withdrawing from said reaction zone a higher molecular weight hydrocarbon containing stream.
  • an improved process for the reduction of oxides of nitrogen contained in a gas stream in the presence of oxygen comprising contacting the gas stream with a zeolite, the improvement comprising using as the zeolite a zeolite having a mole ratio greater than about 20 of an oxide of a first tetravalent element to an oxide of a second tetravalent element different from said first tetravalent element, trivalent element, pentavalent element or mixture thereof and having, after calcination, the X-ray diffraction lines of Table II.
  • the zeolite may contain a metal or metal ions (such as cobalt, copper or mixtures thereof) capable of catalyzing the reduction of the oxides of mtrogen, and may be conducted in the presence of a stoichiometric excess of oxygen.
  • the gas stream is the exhaust stream of an internal combustion engine.
  • the term "large pore” means having an average pore size diameter greater than about 6.0 Angstroms, preferably from about 6.5 Angstroms to about 7.5 Angstroms.
  • SSZ-59 is prepared by contacting an active source of one or more oxides selected from the group consisting of monovalent element oxides, divalent element oxides, trivalent element oxides, and tetravalent element oxides with the N-methyl-N-[(l- phenylcyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N-[(l -(4- chlorophenyl)cyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N-[(l- phenylcyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-[( 1 -(4- chlorophenyl)cyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-((l- phenylcyclopentyl)methyl]piperidinium cation or N-methyl-N-[(l -(4- chlorophenyl)cyclopentt
  • SSZ-59 is prepared from a reaction mixture having the composition shown in Table A below.
  • Table A TABLE A Reaction Mixture Typical Preferred YO 2 /W a O b > 20 35 - 70 OH-/YO 2 0.1 - 0.5 0.15 - 0.3 Q/YO 2 0.05 - 0.5 0.1 - 0.2 M 2 n /YO 2 0.02 - 0.04 0.1 - 0.25 H 2 O/YO 20 - 80 25 - 40
  • Y, W, Q, M and n are as defined above, and a is 1 or 2, and b is 2 when a is 1 (i.e., W is tetravalent) and b is 3 when a is 2 (i.e., W is trivalent).
  • SSZ-59 is prepared by a process comprising: (a) preparing an aqueous solution containing sources of at least one oxide capable of forming a crystalline molecular sieve and a N-methyl-N-[(l - phenylcyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]heptamethyleneiminium cation, N-methyl-N- [(l-phenylcyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]hexamethyleneiminium cation, N-methyl-N-((l- phenylcyclopentyl)methyl]piperidinium cation or N-methyl-N-[(l-(4- chlorophenyl)cyclopentyl)methyl]piperidinium c
  • SSZ-59 may comprise the crystalline material and the templating agent in combination with metallic and non-metallic oxides bonded in tetrahedral coordination through shared oxygen atoms to form a cross-linked three dimensional crystal structure.
  • the metallic and non-metallic oxides comprise one or a combination of oxides of a first tetravalent element(s), and one or a combination of a second tefravalent element(s) different from the first tetravalent element(s), trivalent element(s), pentavalent element(s) or mixture thereof.
  • the first tetravalent element(s) is preferably selected from the group consisting of silicon, germanium and combinations thereof. More preferably, the first tetravalent element is silicon.
  • the second tetravalent element (which is different from the first tetravalent element), trivalent element and pentavalent element is preferably selected from the group consisting of aluminum, gallium, iron, boron, titanium, indium, vanadium and combinations thereof. More preferably, the second trivalent or tetravalent element is aluminum or boron.
  • Typical sources of aluminum oxide for the reaction mixture include aluminates, alumina, aluminum colloids, aluminum oxide coated on silica sol, hydrated alumina gels such as Al(OH) 3 and aluminum compounds such as A1C1 3 and A1 2 (S0 4 ) 3 .
  • Typical sources of silicon oxide include silicates, silica hydrogel, silicic acid, fumed silica, colloidal silica, tetra-alkyl orthosilicates, and silica hydroxides. Boron, as well as gallium, germanium, titanium, indium, vanadium and iron, can be added in forms corresponding to their aluminum and silicon counterparts.
  • a source zeolite reagent may provide a source of aluminum or boron. In most cases, the source zeolite also provides a source of silica. The source zeolite in its dealuminated or deboronated form may also be used as a source of silica, with additional silicon added using, for example, the conventional sources listed above.
  • a source zeolite reagent as a source of alumina for the present process is more completely described in U.S. Patent No. 5,225,179, issued July 6, 1993 to Nakagawa entitled “Method of Making Molecular Sieves", the disclosure of which is incorporated herein by reference.
  • an alkali metal hydroxide and/or an alkaline earth metal hydroxide such as the hydroxide of sodium, potassium, lithium, cesium, rubidium, calcium, and magnesium, is used in the reaction mixture; however, this component can be omitted so long as the equivalent basicity is maintained.
  • the templating agent may be used to provide hydroxide ion.
  • the alkali metal cation or alkaline earth cation may be part of the as-synthesized crystalline oxide material, in order to balance valence electron charges therein.
  • the reaction mixture is maintained at an elevated temperature until the crystals of the SSZ-59 zeolite are formed.
  • the hydrothermal crystallization is usually conducted under autogenous pressure, at a temperature between 100°C and 200°C, preferably between 135°C and 160°C.
  • the crystallization period is typically greater than 1 day and preferably from about 3 days to about 20 days.
  • the zeolite is prepared using mild stirring or agitation.
  • the SSZ-59 crystals can be allowed to nucleate spontaneously from the reaction mixture.
  • the use of SSZ-59 crystals as seed material can be advantageous in decreasing the time necessary for complete crystallization to occur.
  • seeding can lead to an increased purity of the product obtained by promoting the nucleation and/or formation of SSZ-59 over any undesired phases.
  • SSZ-59 crystals are added in an amount between 0.1 and 10% of the weight of silica used in the reaction mixture.
  • the crystals are water- washed and then dried, e.g., at 90°C to 150°C for from 8 to 24 hours, to obtain the as-synthesized SSZ-59 zeolite crystals.
  • the drying step can be performed at atmospheric pressure or under vacuum.
  • SSZ-59 as prepared has a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide, titanium oxide, indium oxide, vanadium oxide and mixtures thereof greater than about 20; and has, after calcination, the X-ray diffraction lines of Table II below.
  • SSZ-59 further has a composition, as synthesized (i.e., prior to removal of the templating agent from the zeolite) and in the anhydrous state, in terms of mole ratios, shown in Table B below.
  • Table B TABLE B As-Svnthesized SSZ-59 YO 2 /W c O d > 20 M 2/n /YO 2 0.01 - 0.03 Q/YO 2 0.02 - 0.05 where Y, W, c, d, M and Q are as defined above.
  • SSZ-59 can be made essentially aluminum free, i.e., having a silica to alumina mole ratio of ⁇ .
  • a method of increasing the mole ratio of silica to alumina is by using standard acid leaching or chelating treatments.
  • essentially aluminum-free SSZ- 59 can be synthesized directly using essentially aluminum-free silicon sources as the main tetrahedral metal oxide component, if boron is also present.
  • SSZ-59 can also be prepared directly as either an aluminosilicate or a borosilicate.
  • Lower silica to alumina ratios may also be obtained by using methods which insert aluminum into the crystalline framework. For example, aluminum insertion may occur by thermal treatment of the zeolite in combination with an alumina binder or dissolved source of alumina. Such procedures are described in U.S. Patent No.
  • SSZ-59 is comprised of a new framework structure or topology which is characterized by its X-ray diffraction pattern.
  • SSZ-59 zeolites, as-synthesized, have a crystalline structure whose X-ray powder diffraction pattern exhibit the characteristic lines shown in Table I and is thereby distinguished from other zeolites. TABLE I
  • the X-ray patterns provided are based on a relative intensity scale in which the strongest line in the X-ray pattern is assigned a value of 100: W(weak) is less than 20; M(medium) is between 20 and 40; S(strong) is between 40 and 60; VS(very strong) is greater than 60.
  • Table LA shows the X-ray powder diffraction lines for as-synthesized SSZ- including actual relative intensities.
  • the SSZ-59 zeolites After calcination, the SSZ-59 zeolites have a crystalline structure whose X-ray powder diffraction pattern include the characteristic lines shown in Table II: TABLE II
  • Crystalline SSZ-59 can be used as-synthesized, but preferably will be thermally treated (calcined). Usually, it is desirable to remove the alkali metal cation by ion exchange and replace it with hydrogen, ammonium, or any desired metal ion.
  • the zeolite can be leached with chelating agents, e.g., EDTA or dilute acid solutions, to increase the silica to alumina mole ratio.
  • the zeolite can also be steamed; steaming helps stabilize the crystalline lattice to attack from acids.
  • the zeolite can be used in intimate combination with hydrogenating components, such as tungsten, vanadium molybdenum, rhenium, nickel cobalt, chromium, manganese, or a noble metal, such as palladium or platinum, for those applications in which a hydrogenation-dehydrogenation function is desired.
  • Metals may also be introduced into the zeolite by replacing some of the cations in the zeolite with metal cations via standard ion exchange techniques (see, for example, U.S. Patent Nos. 3,140,249 issued July 7, 1964 to Plank et al; 3,140,251 issued July 7, 1964 to Plank et al.; and 3,140,253 issued July 7, 1964 to Plank et al.).
  • Typical replacing cations can include metal cations, e.g., rare earth, Group LA, Group IIA and Group VIII metals, as well as their mixtures.
  • cations of metals such as rare earth, Mn, Ca, Mg, Zn, Cd, Pt, Pd, Ni, Co, Ti, Al, Sn, and Fe are particularly preferred.
  • the hydrogen, ammonium, and metal components can be ion-exchanged into the SSZ-59.
  • the zeolite can also be impregnated with the metals, or, the metals can be physically and intimately admixed with the zeolite using standard methods known to the art. Typical ion-exchange techniques involve contacting the synthetic zeolite with a solution containing a salt of the desired replacing cation or cations.
  • zeolite is usually calcined prior to the ion- exchange procedure to remove the organic matter present in the channels and on the surface, since this results in a more effective ion exchange.
  • Representative ion exchange techniques are disclosed in a wide variety of patents including U.S. Patent Nos. 3,140,249 issued on July 7, 1964 to Plank et al.; 3,140,251 issued on July 7, 1964 to Plank et al.; and 3,140,253 issued on July 7, 1964 to Plank et al.
  • the zeolite is typically washed with water and dried at temperatures ranging from 65 °C to about 200°C. After washing, the zeolite can be calcined in air or inert gas at temperatures ranging from about 200°C to about 800°C for periods of time ranging from 1 to 48 hours, or more, to produce a catalytically active product especially useful in hydrocarbon conversion processes.
  • the spatial arrangement of the atoms which form the basic crystal lattice of the zeolite remains essentially unchanged.
  • SSZ-59 can be formed into a wide variety of physical shapes.
  • the zeolite can be in the form of a powder, a granule, or a molded product, such as extrudate having a particle size sufficient to pass through a 2-mesh (Tyler) screen and be retained on a 400-mesh (Tyler) screen.
  • the aluminosilicate can be extruded before drying, or, dried or partially dried and then extruded.
  • SSZ-59 can be composited with other materials resistant to the temperatures and other conditions employed in organic conversion processes.
  • matrix materials include active and inactive materials and synthetic or naturally occurring zeolites as well as inorganic materials such as clays, silica and metal oxides.
  • Hydrocarbon Conversion Processes SSZ-59 zeolites are useful in hydrocarbon conversion reactions. Hydrocarbon conversion reactions are chemical and catalytic processes in which carbon containing compounds are changed to different carbon containing compounds. Examples of hydrocarbon conversion reactions in which SSZ-59 are expected to be useful include hydrocracking, dewaxing, catalytic cracking and olefin and aromatics formation reactions.
  • the catalysts are also expected to be useful in other petroleum refining and hydrocarbon conversion reactions such as isomerizing n-paraffins and naphthenes, polymerizing and oligomerizing olefinic or acetylenic compounds such as isobutylene and butene-1, reforming, isomerizing polyalkyl substituted aromatics (e.g., m-xylene), and disproportionating aromatics (e.g., toluene) to provide mixtures of benzene, xylenes and higher methylbenzenes and oxidation reactions.
  • isomerizing n-paraffins and naphthenes polymerizing and oligomerizing olefinic or acetylenic compounds such as isobutylene and butene-1
  • reforming isomerizing polyalkyl substituted aromatics (e.g., m-xylene), and disproportionating aromatics (e.g., toluene) to provide mixtures of
  • SSZ-59 catalysts may have high selectivity, and under hydrocarbon conversion conditions can provide a high percentage of desired products relative to total products.
  • SSZ-59 zeolites can be used in processing hydrocarbonaceous feedstocks.
  • Hydrocarbonaceous feedstocks contain carbon compounds and can be from many different sources, such as virgin petroleum fractions, recycle petroleum fractions, shale oil, liquefied coal, tar sand oil, synthetic paraffins from NAO, recycled plastic feedstocks and, in general, can be any carbon containing feedstock susceptible to zeolitic catalytic reactions.
  • the feed can contain metal or be free of metals, it can also have high or low nitrogen or sulfur impurities. It can be appreciated, however, that in general processing will be more efficient (and the catalyst more active) the lower the metal, nitrogen, and sulfur content of the feedstock.
  • the conversion of hydrocarbonaceous feeds can take place in any convenient mode, for example, in fluidized bed, moving bed, or fixed bed reactors depending on the types of process desired.
  • the formulation of the catalyst particles will vary depending on the conversion process and method of operation.
  • reaction which can be performed using the catalyst of this invention containing a metal, e.g., a Group VIII metal such platinum, include hydrogenation-dehydrogenation reactions, denitrogenation and desulfurization reactions.
  • a metal e.g., a Group VIII metal such platinum
  • the hydrogenation component is generally selected from the group of hydrogenation catalysts consisting of one or more metals of Group VIB and Group VIII, including the salts, complexes and solutions containing such.
  • the hydrogenation catalyst is preferably selected from the group of metals, salts and complexes thereof of the group consisting of at least one of platinum, palladium, rhodium, iridium, ruthenium and mixtures thereof or the group consisting of at least one of nickel, molybdenum, cobalt, tungsten, titanium, chromium and mixtures thereof.
  • Reference to the catalytically active metal or metals is intended to encompass such metal or metals in the elemental state or in some form such as an oxide, sulfide, halide, carboxylate and the like.
  • the hydrogenation catalyst is present in an effective amount to provide the hydrogenation function of the hydrocracking catalyst, and preferably in the range of from 0.05 to 25% by weight.
  • Dewaxing SSZ-59 preferably predominantly in the hydrogen form, can be used to dewax hydrocarbonaceous feeds by selectively removing straight chain paraffins.
  • the viscosity index of the dewaxed product is improved (compared to the waxy feed) when the waxy feed is contacted with SSZ-59 under isomerization dewaxing conditions.
  • the catalytic dewaxing conditions are dependent in large measure on the feed used and upon the desired pour point.
  • Hydrogen is preferably present in the reaction zone during the catalytic dewaxing process.
  • the hydrogen to feed ratio is typically between about 500 and about 30,000 SCF/bbl (standard cubic feet per barrel), preferably about 1000 to about 20,000 SCFYbbl. Generally, hydrogen will be separated from the product and recycled to the reaction zone.
  • Typical feedstocks include light gas oil, heavy gas oils and reduced crudes boiling above about 350°F.
  • a typical dewaxing process is the catalytic dewaxing of a hydrocarbon oil feedstock boiling above about 350°F and containing straight chain and slightly branched chain hydrocarbons by contacting the hydrocarbon oil feedstock in the presence of added hydrogen gas at a hydrogen pressure of about 15-3000 psi with a catalyst comprising SSZ-59 and at least one Group VIII metal.
  • the SSZ-59 hydrodewaxing catalyst may optionally contain a hydrogenation component of the type commonly employed in dewaxing catalysts. See the aforementioned U.S. Patent No. 4,910,006 and U.S. Patent No. 5,316,753 for examples of these hydrogenation components.
  • the hydrogenation component is present in an effective amount to provide an effective hydrodewaxing and hydroisomerization catalyst preferably in the range of from about 0.05 to 5% by weight.
  • the catalyst may be run in such a mode to increase isodewaxing at the expense of cracking reactions.
  • the feed may be hydrocracked, followed by dewaxing. This type of two stage process and typical hydrocracking conditions are described in U.S. Patent No.
  • SSZ-59 may also be utilized as a dewaxing catalyst in the form of a layered catalyst. That is, the catalyst comprises a first layer comprising zeolite SSZ-59 and at least one Group VIII metal, and a second layer comprising an aluminosilicate zeolite which is more shape selective than zeolite SSZ-59.
  • the use of layered catalysts is disclosed in U.S. Patent No. 5,149,421, issued September 22, 1992 to Miller, which is incorporated by reference herein in its entirety.
  • the layering may also include a bed of SSZ-59 layered with a non-zeolitic component designed for either hydrocracking or hydrofmishing.
  • SSZ-59 may also be used to dewax raffmates, including bright stock, under conditions such as those disclosed in U. S. Patent No. 4,181,598, issued January 1, 1980 to Gillespie et al., which is incorporated by reference herein in its entirety. It is often desirable to use mild hydrogenation (sometimes referred to as hydrofinishing) to produce more stable dewaxed products.
  • the hydrofmishing step can be performed either before or after the dewaxing step, and preferably after.
  • Hydrofinishing is typically conducted at temperatures ranging from about 190°C to about 340°C at pressures from about 400 psig to about 3000 psig at space velocities (LHSV) between about 0.1 and 20 and a hydrogen recycle rate of about 400 to 1500 SCF/bbl.
  • the hydrogenation catalyst employed must be active enough not only to hydrogenate the olefins, diolefins and color bodies which may be present, but also to reduce the aromatic content. Suitable hydrogenation catalyst are disclosed in U. S. Patent No. 4,921,594, issued May 1, 1990 to Miller, which is incorporated by reference herein in its entirety.
  • the hydrofinishing step is beneficial in preparing an acceptably stable product (e.g., a lubricating oil) since dewaxed products prepared from hydrocracked stocks tend to be unstable to air and light and tend to form sludges spontaneously and quickly.
  • Lube oil may be prepared using SSZ-59.
  • a C 20+ lube oil may be made by isomerizing a C 20+ olefin feed over a catalyst comprising SSZ-59 in the hydrogen form and at least one Group VIII metal.
  • the lubricating oil may be made by hydrocracking in a hydrocracking zone a hydrocarbonaceous feedstock to obtain an effluent comprising a hydrocracked oil, and catalytically dewaxing the effluent at a temperature of at least about 400°F and at a pressure of from about 15 psig to about 3000 psig in the presence of added hydrogen gas with a catalyst comprising SSZ-59 in the hydrogen form and at least one Group VIII metal.
  • Aromatics Formation SSZ-59 can be used to convert light straight run naphthas and similar mixtures to highly aromatic mixtures.
  • normal and slightly branched chained hydrocarbons preferably having a boiling range above about 40°C and less than about 200°C
  • a catalyst comprising SSZ-59 can be converted to products having a substantial higher octane aromatics content by contacting the hydrocarbon feed with a catalyst comprising SSZ-59. It is also possible to convert heavier feeds into BTX or naphthalene derivatives of value using a catalyst comprising SSZ-59.
  • the conversion catalyst preferably contains a Group VIXI metal compound to have sufficient activity for commercial use.
  • Group VIII metal compound as used herein is meant the metal itself or a compound thereof.
  • the Group VIII noble metals and their compounds, platinum, palladium, and iridium, or combinations thereof can be used.
  • Rhenium or tin or a mixture thereof may also be used in conjunction with the Group VIII metal compound and preferably a noble metal compound.
  • the most preferred metal is platinum.
  • the amount of Group VIII metal present in the conversion catalyst should be within the normal range of use in reforming catalysts, from about 0.05 to 2.0 weight percent, preferably 0.2 to 0.8 weight percent. It is critical to the selective production of aromatics in useful quantities that the conversion catalyst be substantially free of acidity, for example, by neutralizing the zeolite with a basic metal, e.g., alkali metal, compound. Methods for rendering the catalyst free of acidity are known in the art. See the aforementioned U.S. Patent No. 4,910,006 and U.S. Patent No. 5,316,753 for a description of such methods.
  • the preferred alkali metals are sodium, potassium, rubidium and cesium.
  • the zeolite itself can be substantially free of acidity only at very high silica: alumina mole ratios.
  • Catalytic Cracking Hydrocarbon cracking stocks can be catalytically cracked in the absence of hydrogen using SSZ-59, preferably predominantly in the hydrogen form.
  • SSZ-59 is used as a catalytic cracking catalyst in the absence of hydrogen, the catalyst may be employed in conjunction with traditional cracking catalysts, e.g., any aluminosilicate heretofore employed as a component in cracking catalysts. Typically, these are large pore, crystalline aluminosilicates. Examples of these traditional cracking catalysts are disclosed in the aforementioned U.S.
  • Patent No. 4,910,006 and U.S. Patent No 5,316,753 When a traditional cracking catalyst (TC) component is employed, the relative weight ratio of the TC to the SSZ-59 is generally between about 1:10 and about 500:1, desirably between about 1:10 and about 200:1, preferably between about 1:2 and about 50:1, and most preferably is between about 1:1 and about 20:l.
  • the novel zeolite and/or the traditional cracking component may be further ion exchanged with rare earth ions to modify selectivity.
  • the cracking catalysts are typically employed with an inorganic oxide matrix component. See the aforementioned U.S. Patent No. 4,910,006 and U.S. Patent No. 5,316,753 for examples of such matrix components.
  • the present catalyst is highly active and highly selective for isomerizing C 4 to C hydrocarbons.
  • the activity means that the catalyst can operate at relatively low temperature which thermodynamically favors highly branched paraffins. Consequently, the catalyst can produce a high octane product.
  • the high selectivity means that a relatively high liquid yield can be achieved when the catalyst is run at a high octane.
  • the present process comprises contacting the isomerization catalyst, i.e., a catalyst comprising SSZ-59 in the hydrogen form, with a hydrocarbon feed under isomerization conditions.
  • the feed is preferably a light straight run fraction, boiling within the range of 30°F to 250°F and preferably from 60°F to 200°F.
  • the hydrocarbon feed for the process comprises a substantial amount of C 4 to C 7 normal and slightly branched low octane hydrocarbons, more preferably C 5 and C 6 hydrocarbons. It is preferable to carry out the isomerization reaction in the presence of hydrogen.
  • hydrogen is added to give a hydrogen to hydrocarbon ratio (H 2 HC) of between 0.5 and 10 H 2 /HC, more preferably between 1 and 8 H /HC. See the aforementioned U.S. Patent No. 4,910,006 and U.S. Patent No. 5,316,753 for a further discussion of isomerization process conditions.
  • a low sulfur feed is especially preferred in the present process.
  • the feed preferably contains less than 10 ppm, more preferably less than 1 ppm, and most preferably less than 0.1 ppm sulfur.
  • acceptable levels can be reached by hydrogenating the feed in a presaturation zone with a hydrogenating catalyst which is resistant to sulfur poisoning. See the aforementioned U.S. Patent No. 4,910,006 and U.S. Patent No. 5,316,753 for a further discussion of this hydrodesulfurization process. It is preferable to limit the nitrogen level and the water content of the feed. Catalysts and processes which are suitable for these purposes are known to those skilled in the art. After a period of operation, the catalyst can become deactivated by sulfur or coke.
  • the conversion catalyst preferably contains a Group VIII metal compound to have sufficient activity for commercial use.
  • Group VIII metal compound as used herein is meant the metal itself or a compound thereof.
  • the Group VIII noble metals and their compounds, platinum, palladium, and iridium, or combinations thereof can be used. Rhenium and tin may also be used in conjunction with the noble metal. The most preferred metal is platinum.
  • Alkylation and Transalkylation SSZ-59 can be used in a process for the alkylation or transalkylation of an aromatic hydrocarbon.
  • the process comprises contacting the aromatic hydrocarbon with a C 2 to C 16 olefin alkylating agent or a polyalkyl aromatic hydrocarbon transalkylating agent, under at least partial liquid phase conditions, and in the presence of a catalyst comprising SSZ-59.
  • SSZ-59 can also be used for removing benzene from gasoline by alkylating the benzene as described above and removing the alkylated product from the gasoline.
  • the SSZ-59 zeolite should be predominantly in its hydrogen ion form. It is preferred that, after calcination, at least 80% of the cation sites are occupied by hydrogen ions and/or rare earth ions.
  • suitable aromatic hydrocarbon feedstocks which may be alkylated or transalkylated by the process of the invention include aromatic compounds such as benzene, toluene and xylene. The preferred aromatic hydrocarbon is benzene.
  • naphthalene or naphthalene derivatives such as dimethylnaphthalene may be desirable.
  • Mixtures of aromatic hydrocarbons may also be employed.
  • Suitable olefins for the alkylation of the aromatic hydrocarbon are those containing 2 to 20, preferably 2 to 4, carbon atoms, such as ethylene, propylene, butene-1, trans-butene-2 and cis-butene-2, or mixtures thereof.
  • pentenes are desirable.
  • the preferred olefins are ethylene and propylene. Longer chain alpha olefins may be used as well.
  • the transalkylating agent is a polyalkyl aromatic hydrocarbon containing two or more alkyl groups that each may have from 2 to about 4 carbon atoms.
  • suitable polyalkyl aromatic hydrocarbons include di-, tri- and tetra-alkyl aromatic hydrocarbons, such as diethylbenzene, triethylbenzene, diethylmethylbenzene (diethyltoluene), di-isopropylbenzene, di-isopropyltoluene, dibutylbenzene, and the like.
  • Preferred polyalkyl aromatic hydrocarbons are the dialkyl benzenes.
  • a particularly preferred polyalkyl aromatic hydrocarbon is di-isopropylbenzene.
  • reaction conditions are as follows.
  • the aromatic hydrocarbon feed should be present in stoichiometric excess. It is preferred that molar ratio of aromatics to olefins be greater than four-to-one to prevent rapid catalyst fouling.
  • the reaction temperature may range from 100°F to 600°F, preferably 250°F to 450°F.
  • the reaction pressure should be sufficient to maintain at least a partial liquid phase in order to retard catalyst fouling. This is typically 50 psig to 1000 psig depending on the feedstock and reaction temperature.
  • Contact time may range from 10 seconds to 10 hours, but is usually from 5 minutes to an hour.
  • the molar ratio of aromatic hydrocarbon will generally range from about 1 : 1 to 25 : 1 , and preferably from about 2 : 1 to 20: 1.
  • the reaction temperature may range from about 100°F to 600°F, but it is preferably about 250°F to 450°F.
  • the reaction pressure should be sufficient to maintain at least a partial liquid phase, typically in the range of about 50 psig to 1000 psig, preferably 300 psig to 600 psig.
  • the weight hourly space velocity will range from about 0.1 to 10.
  • Patent No. 5,082,990 issued on January 21, 1992 to Hsieh, et al. describes such processes and is incorporated herein by reference.
  • Conversion of Paraffins to Aromatics SSZ-59 can be used to convert light gas C 2 -C 6 paraffins to higher molecular weight hydrocarbons including aromatic compounds.
  • the zeolite will contain a catalyst metal or metal oxide wherein said metal is selected from the group consisting of Groups IB, LTJB, VIII and IIIA of the Periodic Table.
  • the metal is gallium, niobium, indium or zinc in the range of from about 0.05 to 5% by weight.
  • Xylene Isomerization SSZ-59 may also be useful in a process for isomerizing one or more xylene isomers in a C 8 aromatic feed to obtain ortho-, meta-, and para-xylene in a ratio approaching the equilibrium value.
  • xylene isomerization is used in conjunction with a separate process to manufacture para-xylene.
  • a portion of the para-xylene in a mixed C 8 aromatics stream may be recovered by crystallization and centrifugation. The mother liquor from the crystallizer is then reacted under xylene isomerization conditions to restore ortho-, meta- and para-xylenes to a near equilibrium ratio.
  • part of the ethylbenzene in the mother liquor is converted to xylenes or to products which are easily separated by filtration.
  • the isomerate is blended with fresh feed and the combined stream is distilled to remove heavy and light by- products.
  • the resultant C 8 aromatics stream is then sent to the crystallizer to repeat the cycle.
  • isomerization in the vapor phase is conducted in the presence of 3.0 to 30.0 moles of hydrogen per mole of alkylbenzene (e.g., ethylbenzene).
  • the catalyst should comprise about 0.1 to 2.0 wt.% of a hydrogenation/dehydrogenation component selected from Group VIII (of the Periodic Table) metal component, especially platinum or nickel.
  • Group VIII metal component is meant the metals and their compounds such as oxides and sulfides.
  • the isomerization feed may contain 10 to 90 wt.% of a diluent such as toluene, trimethylbenzene, naphthenes or paraffins.
  • Oligomerization It is expected that SSZ-59 can also be used to oligomerize straight and branched chain olefins having from about 2 to 21 and preferably 2-5 carbon atoms.
  • the oligomers which are the products of the process are medium to heavy olefins which are useful for both fuels, i.e., gasoline or a gasoline blending stock and chemicals.
  • the oligomerization process comprises contacting the olefin feedstock in the gaseous or liquid phase with a catalyst comprising SSZ-59.
  • the zeolite can have the original cations associated therewith replaced by a wide variety of other cations according to techniques well known in the art. Typical cations would include hydrogen, ammonium and metal cations including mixtures of the same. Of the replacing metallic cations, particular preference is given to cations of metals such as rare earth metals, manganese, calcium, as well as metals of Group II of the Periodic Table, e.g., zinc, and Group VIII of the Periodic Table, e.g., nickel.
  • the zeolite have a fairly low aromatization activity, i.e., in which the amount of aromatics produced is not more than about 20% by weight. This is accomplished by using a zeolite with controlled acid activity [alpha value] of from about 0.1 to about 120, preferably from about 0.1 to about 100, as measured by its ability to crack n-hexane. Alpha values are defined by a standard test known in the art, e.g., as shown in U.S. Patent No. 3,960,978 issued on June 1, 1976 to Givens et al. which is incorporated totally herein by reference.
  • Such zeolites may be obtained by steaming, by use in a conversion process or by any other method which may occur to one skilled in this art.
  • Condensation of Alcohols SSZ-59 can be used to condense lower aliphatic alcohols having 1 to 10 carbon atoms to a gasoline boiling point hydrocarbon product comprising mixed aliphatic and aromatic hydrocarbon.
  • the process disclosed in U.S. Patent No. 3,894,107, issued July 8, 1975 to Butter et al. describes the process conditions used in this process, which patent is incorporated totally herein by reference.
  • the catalyst may be in the hydrogen form or may be base exchanged or impregnated to contain ammonium or a metal cation complement, preferably in the range of from about 0.05 to 5% by weight.
  • the metal cations that may be present include any of the metals of the Groups I through VIII of the Periodic Table. However, in the case of Group IA metals, the cation content should in no case be so large as to effectively inactivate the catalyst, nor should the exchange be such as to eliminate all acidity. There may be other processes involving treatment of oxygenated substrates where a basic catalyst is desired. Methane Upgrading Higher molecular weight hydrocarbons can be formed from lower molecular weight hydrocarbons by contacting the lower molecular weight hydrocarbon with a catalyst comprising SSZ-59 and a metal or metal compound capable of converting the lower molecular weight hydrocarbon to a higher molecular weight hydrocarbon.
  • Examples of such reactions include the conversion of methane to C 2+ hydrocarbons such as ethylene or benzene or both.
  • Examples of useful metals and metal compounds include lanthanide and or actinide metals or metal compounds.
  • SSZ-59 may be used for the catalytic reduction of the oxides of nitrogen in a gas stream.
  • the gas stream also contains oxygen, often a stoichiometric excess thereof.
  • the SSZ-59 may contain a metal or metal ions within or on it which are capable of catalyzing the reduction of the mtrogen oxides. Examples of such metals or metal ions include copper, cobalt and mixtures thereof.
  • One example of such a process for the catalytic reduction of oxides of nitrogen in the presence of a zeolite is disclosed in U.S. Patent No. 4,297,328, issued October 27, 1981 to Ritscher et al., which is incorporated by reference herein.
  • the catalytic process is the combustion of carbon monoxide and hydrocarbons and the catalytic reduction of the oxides of nitrogen contained in a gas stream, such as the exhaust gas from an internal combustion engine.
  • the zeolite used is metal ion-exchanged, doped or loaded sufficiently so as to provide an effective amount of catalytic copper metal or copper ions within or on the zeolite.
  • the process is conducted in an excess of oxidant, e.g., oxygen.
  • oxidant e.g., oxygen.
  • the anion (X " ) associated with the cation may be any anion which is not detrimental to the formation of the zeolite.
  • Representative anions include halogen, e.g., fluoride, chloride, bromide and iodide, hydroxide, acetate, sulfate, tefrafluoroborate, carboxylate, and the like. Hydroxide is the most preferred anion.
  • the resulting Mixture was transferred to a 2-liter separatory funnel and diluted with 600ml ethyl acetate. The mixture was washed three times with water (300 ml each) and once with 300 ml saturated sodium chloride solution. The organic phase was dried over anhydrous magnesium sulfate, filtered and concentrated at reduced pressure on a rotary evaporator to give 241 gm of the desired amide (pure by NMR analysis) as a tan-colored solid.
  • the mixture was diluted with 500 ml ethyl ether and the reaction was worked up by adding 225 ml of 15% aqueous NaOH solution drop-wise via an addition funnel.
  • the resulting bi-phasic (colorless liquid and white precipitate) solution was filtered though a fritted-glass funnel The filtrate was dried over anhydrous magnesium sulfate, filtered and concentrated at reduced pressure on a rotary evaporator to give 118 gm of the desired amine (pure by NMR analysis) as a pale yellow_oil.
  • N-methyl-N-[(l -(4-chlorophenyl)cyclopentyl)methyl]piperidinium cation was synthesized using the above procedure starting from piperidine and l-(4- chlorophenyl)cyclopentanecarbonyl chloride.
  • N-methyl-N-[(l -phenylcyclopentyl)methyl]hexamethyleneiminium cation was synthesized using the above procedure starting from hexametheleneimine and 1- phenylcyclopentanecarbonyl chloride
  • the mixture was thoroughly stirred and the resulting gel was capped off and placed in steel Parr autoclave and heated in an oven at 160°C while tumbling at 43 rpm.
  • the progress of the reaction was monitored by Scanning Electron Microscopy at intervals of 6 days. Once completed (after heating for 6 days), the pasty looking reaction mixture was filtered through a fritted glass funnel. The collected solid was rinsed with water (1 liter) and air-dried overnight. The solids were further dried in an oven at 120°C for 2 hrs.
  • the reaction yielded 0.75 gm of SSZ-59 as a white powder. Analysis by XRD shows the product to be SSZ-59.
  • SSZ-59 is made in a similar manner using in turn B, D, E and F as the templating agent.
  • Example 9 Calcination of SSZ-59 The material from Example 8 is calcined in the following manner. A thin bed of material is heated in a muffle furnace from room temperature to 120°C at a rate of 1°C per minute and held at 120°C for three hours. The temperature is then ramped up to 540°C at the same rate and held at this temperature for 5 hours, after which it is increased to 594°C and held there for another 5 hours. A 50/50 mixture of air and nitrogen is passed over the zeolite at a rate of 20 standard cubic feet per minute during heating. The X-ray diffraction data for the product is provided in Table TV below. TABLE TV
  • This NH 4 + form of SSZ-59 can then be converted to the H + form by calcination (as described in Example 9) to 540°C.
  • Example 11 Constraint Index Determination
  • the hydrogen form of the zeolite of Example 8 (after treatment according to Examples 9 and 10) is pelletized at 2-3 KPSI, crushed and meshed to 20-40, and then > 0.50 gram is calcined at about 540°C in air for four hours and cooled in a desiccator. 0.50 Gram is packed into a 3/8 inch stainless steel tube with alundurn on both sides of the zeolite bed. A Lindburg furnace is used to heat the reactor tube. Helium is introduced into the reactor tube at 10 cc/min. and at atmospheric pressure.
  • the reactor is heated to about 315°C, and a 50/50 (w/w) feed of n-hexane and 3-methylpentane is introduced into the reactor at a rate of 8 ⁇ l/min. Feed delivery is made via a Brownlee pump. Direct sampling into a gas chromatograph begins after 10 minutes of feed introduction. The Constraint Index value is calculated from the gas chromatographic data using methods known in the art, and is found to be 0.27, which suggests a large pore zeolite. At 315°C and 10 minutes on stream, feed conversion was greater than 62%. SSZ-59 has a very high cracking activity, indicative of strongly acidic sites.
  • Example 12 Hydrocracking of n-Hexadecane
  • a sample of SSZ-59 as prepared in Example 8 was treated as in Examples 9 and 10. Then a sample was slurried in water and the pH of the slurry was adjusted to a pH of -10 with dilute ammonium hydroxide. To the slurry was added a solution of Pd(NH 3 ) 4 (NO 3 ) 2 at a concentration which would provide 0.5 wt. % Pd with respect to the dry weight of the zeolite sample. This slurry was stirred for 48 hours at 100°C. After cooling, the slurry was filtered through a glass frit, washed with de-ionized water, and dried at 100°C.

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US905351 1986-09-08
US905353 1986-09-08
US09/905,353 US6461578B1 (en) 2001-07-13 2001-07-13 Using zeolite SSZ-59 for reduction of oxides of nitrogen in a gas stream
US09/905,351 US6547958B1 (en) 2001-07-13 2001-07-13 Hydrocarbon conversion using zeolite SSZ-59
US09/905,461 US6464956B1 (en) 2001-07-13 2001-07-13 Zeolite SSZ-59 composition of matter and synthesis thereof
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US8647602B2 (en) * 2012-06-08 2014-02-11 Chevron U.S.A. Inc. Method for making aluminosilicate zeolite SSZ-56
WO2023154656A1 (en) * 2022-02-10 2023-08-17 ExxonMobil Technology and Engineering Company Use of cations selected from 1,2,3,5-tetramethylbenzimidazolium, and 1,2, 3,4,5- pentamethylbenzimidazolium as structure directing agents for the preparation of molecular sieves and molecular sieves obtained using the same

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US6086848A (en) * 1995-12-01 2000-07-11 Chevron U.S.A. Inc. Process for preparing zeolites using substituted-piperidinium cations
WO2003006363A2 (en) * 2001-07-13 2003-01-23 Chevron U.S.A. Inc. A process for preparing zeolites

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US5785947A (en) * 1991-12-18 1998-07-28 Chevron U.S.A. Inc. Preparation of zeolites using organic template and amine
US5489424A (en) * 1994-08-24 1996-02-06 Board Of Regents, The University Of Texas System Synthesis of novel molecular sieves using a metal complex as a template
US5965104A (en) * 1996-12-31 1999-10-12 Chevron U.S.A. Inc. Zeolite SSZ-43

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US5911968A (en) * 1995-12-01 1999-06-15 Chevron Chemical Company Llc Method for making zeolite SSZ-44
US6086848A (en) * 1995-12-01 2000-07-11 Chevron U.S.A. Inc. Process for preparing zeolites using substituted-piperidinium cations
WO2003006363A2 (en) * 2001-07-13 2003-01-23 Chevron U.S.A. Inc. A process for preparing zeolites

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