EP1926702A2 - Procede d'hydrogenation de nitriles en amines primaires ou aminonitriles et les catalyseurs appropries - Google Patents

Procede d'hydrogenation de nitriles en amines primaires ou aminonitriles et les catalyseurs appropries

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Publication number
EP1926702A2
EP1926702A2 EP06793409A EP06793409A EP1926702A2 EP 1926702 A2 EP1926702 A2 EP 1926702A2 EP 06793409 A EP06793409 A EP 06793409A EP 06793409 A EP06793409 A EP 06793409A EP 1926702 A2 EP1926702 A2 EP 1926702A2
Authority
EP
European Patent Office
Prior art keywords
alkaline earth
alkali metal
earth metal
ammonium
metal
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.)
Ceased
Application number
EP06793409A
Other languages
German (de)
English (en)
Inventor
Thilo Hahn
Martin Ernst
Johann-Peter Melder
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.)
BASF SE
Original Assignee
BASF SE
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 DE200510044187 external-priority patent/DE102005044187A1/de
Priority claimed from DE200510048999 external-priority patent/DE102005048999A1/de
Priority claimed from DE200510057198 external-priority patent/DE102005057198A1/de
Application filed by BASF SE filed Critical BASF SE
Publication of EP1926702A2 publication Critical patent/EP1926702A2/fr
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/44—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers
    • C07C209/48—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
    • 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
    • B01J25/00—Catalysts of the Raney type
    • B01J25/02—Raney nickel
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/01—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms
    • C07C211/02—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • C07C211/09—Diamines
    • C07C211/12—1,6-Diaminohexanes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C253/00—Preparation of carboxylic acid nitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C253/00—Preparation of carboxylic acid nitriles
    • C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups

Definitions

  • the invention relates to a process for the hydrogenation of oligo-nitriles having at least two nitrile groups, in the presence of a catalyst which is pretreated before the hydrogenation by contacting with a compound A, which is selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates , Erdalkalimetallhydrogencarbonaten, ammonium hydrogen carbonate, metal carboxylates Erdalkalimetalloxocarbonaten, alkali metal carboxylates, alkaline earth metal, ammonium carboxylates, Alkalimetalldihydrogenphosphaten, Er dalkalimetalldihydrogenphosphaten, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali limetallformia
  • the invention relates to oligo-amines or aminonitriles, obtainable from oligo- nitriles by this process, and the use of catalysts as defined above for the complete or partial hydrogenation of oligo-nitriles.
  • the invention further relates to a catalyst comprising a metal from groups 8 to 10 of the Periodic Table which is pre-treated prior to use with a compound A selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal hydrogencarbonates, ammonium bicarbonate, alkaline earth metal oxocarbonates , genphosphaten alkali metal carboxylates, alkaline earth metal carboxylates, ammonium carboxylates, Alkalimetalldihydro-, Erdalkalimetalldihydrogenphosphaten, ten Alkalimetallhydrogenphospha-, Erdalkalimetallhydrogenphosphaten, alkali metal phosphates, alkaline earth phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali metal formates, Erdalkalimetallformiaten, ammonium formate, Alkalimetalloxal
  • the invention relates to a process for preparing this catalyst, which comprises treating a metal from groups 8 to 10 of the Periodic Table with a compound A selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal bicarbonates, ammonium bicarbonate, Alkaline earth metal oxocarbonates, alkali metal carboxylates, alkaline earth metal carboxylates, ammonium carboxylates, alkali metal dihydrogen phosphates, alkaline earth metal dihydrogen phosphates, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth metal phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali metal formates, alkaline earth metal formates, ammonium formate, alkali metal oxalates, alkaline
  • Amines having at least two amino groups and aminonitriles have a variety of applications and are used in particular as starting material for polyamides, except in solvents, pesticides, surfactants and pharmaceuticals. They are usually produced by hydrogenation of nitriles.
  • Nitriles having more than one nitrile group -CN in the molecule are referred to below as oligonitriles. Hydrogenation of all nitrile groups present in the molecule - this is referred to below as complete hydrogenation - yields oligoamines. If not all but only some of the nitrile groups present in the molecule are hydrogenated (hereinafter referred to as partial hydrogenation), aminonitriles are obtained.
  • adiponitrile ADN
  • ACN partial hydrogenation amino capronitrile
  • caprolactam ACN
  • caprolactam ACN
  • HMD hexamethylenediamine
  • the hydrogenation is usually carried out with hydrogen over nickel or cobalt catalysts, which are preferably present as metal sponge, for example as Raney® nickel or Raney® cobalt.
  • nickel or cobalt catalysts which are preferably present as metal sponge, for example as Raney® nickel or Raney® cobalt.
  • partial and complete hydrogenation are generally carried out in succession, giving a random mixture of aminonitriles, oligoamines and other by-products, in the hydrogenation of dinitriles (ADN), for example, a mixture of aminonitrile (ACN) and diamine ( HMD) as well as by-products.
  • ADN dinitriles
  • ACN aminonitrile
  • HMD diamine
  • the suppression of the complete hydrogenation or the setting of a desired overstatistic aminonitrile / oligoamine ratio is achieved by special embodiments of the hydrogenation, for example, catalyst doping with noble metals or concomitant use of fluorides or cyanides.
  • the aforementioned WO 01/66511 describes the hydrogenation of nitrile groups to amino groups, e.g. the hydrogenation of dinitriles to aminonitriles or diamines with hydrogen on a hydrogenation catalyst (e.g., Raney® nickel or cobalt) which is conditioned in advance. Conditioning is accomplished by mixing the catalyst with a strong mineral base (e.g., hydroxides of the alkali or alkaline earth metals) in a solvent in which the base is poorly soluble.
  • a strong mineral base e.g., hydroxides of the alkali or alkaline earth metals
  • DE 102 07 926 A1 describes the preparation of primary amines by hydrogenation of nitriles, in which reacting the nitrile, hydrogen, and optionally ammonia to a cobalt or nickel catalyst.
  • the catalyst is modified ex situ (prior to the hydrogenation reaction) by adsorption of an alkali metal carbonate or bicarbonate.
  • the known processes have at least one of the following disadvantages: the aminonitrile / oligoamine ratio, ie the ratio of partial to complete hydrogenation, is poorly controllable, the selectivity in a partial hydrogenation is low: instead of the desired aminonitriles, hydrogenation takes place completely to the oligoamines , there are large quantities of by-products whose separation is difficult, toxic substances are used, which must be laboriously separated and disposed of separately,
  • a process for the hydrogenation of nitriles with at least two nitrile groups should be provided, with which amines or aminonitriles can be prepared, ie the process should allow complete or partial hydrogenation. In particular, it should be possible to minimize the extent of complete hydrogenation.
  • Suitable oligonitriles which can be used in the hydrogenation process according to the invention are adiponitrile (ADN), succinonitrile (succinonitrile), iminodiacetonitrile, suberodinitrile or iminodipropionitrile (bis [cyanoethyl] amine). Also suitable are aromatic amines such as m-xylylenediamine or ortho-, meta- or para-phthalonitrile. As oligonitriles having at least three nitrile groups, e.g.
  • Nitrilotrisonitrile (tris [cyanomethyl] amine), nitrilotrispropionitrile (tris [cyanoethyl] amine), 1, 3,6-tricyanohexane or 1,2,4-tricyanobutane.
  • Preferred oligonitriles are those having two nitrile groups. Particularly preferred dinitriles are those having terminal nitrile groups, ie, alpha, omega-dinitriles. Most preferably, adiponitrile is used.
  • the process is characterized in that all the nitrile groups present in the nitrile molecule are hydrogenated to amino groups (complete hydrogenation), resulting in an oligo-amine. This oligoamine no longer contains nitrile groups.
  • an alpha, omega-dinitrile is hydrogenated by complete hydrogenation to an alpha, omega-diamine.
  • adiponitrile (ADN) is hydrogenated to hexamethylenediamine (HMD).
  • partial hydrogenation the process is characterized in that only part of the nitrile groups present in the nitrile molecule are hydrogenated to amino groups (partial hydrogenation), whereby an aminonitrile is obtained.
  • partial hydrogenation of oligonitriles having three nitrile groups, depending on whether one or two of the three nitrile groups are hydrogenated to the amino group, a diaminomononitrile or a monoaminodinitrile can be obtained.
  • an alpha, omega-dinitrile is hydrogenated by partial hydrogenation to an alpha, omega-aminonitrile.
  • adiponitrile is hydrogenated to amino capronitrile (ACN).
  • the oligonitrile is reacted with hydrogen or a hydrogen-containing gas on the catalyst (see below).
  • the hydrogenation can be carried out, for example, in suspension (suspension hydrogenation), or else on a solid, agitated or fluidized bed, for example on a fixed bed or on a fluidized bed.
  • an inert gas such as nitrogen or argon.
  • the hydrogen or the mixture may also be present in dissolved form. If complete hydrogenation is desired, the hydrogen can be used in excess; in the case of partial hydrogenation, the amount of hydrogen required for stoichiometry can be metered in.
  • the amount of catalyst in the suspension hydrogenation is generally from 1 to 30, preferably from 5 to 25,% by weight, based on the content of the hydrogenation reactor. In this case, in the case of supported catalysts, the support material is included. If hydrogenation is carried out on a fixed bed or a fluidized bed, the amount of catalyst may have to be adjusted in the customary manner.
  • the hydrogenation is preferably carried out in the liquid phase.
  • the reaction mixture usually contains at least one solvent; are suitable e.g. Amines, alcohols, ethers, amides or hydrocarbons.
  • the solvent corresponds to the reaction product to be prepared, i. One uses an oligo-amine or aminonitrile as a solvent.
  • Suitable amines are, for example, hexamethylenediamine or ethylenediamine.
  • Suitable alcohols are preferably those having 1 to 4 carbon atoms, for example methanol or ethanol.
  • Suitable ethers are, for example, methyl tert-butyl ether (MTBE) or tetrahydrofuran (THF).
  • Suitable amides are, for example, those having 1 to 6 carbon atoms.
  • Suitable hydrocarbons are, for example, alkanes, such as hexanes or cyclohexane, and aromatics, for example toluene or the xylene.
  • the amount of the solvent in the reaction mixture is usually 0 to 90% by weight. If solvent and product are identical, the amount of solvent may be over 99% by weight.
  • reaction in a complete hydrogenation, can also be carried out in the product procedure, even in the absence of an additional solvent, for example in the complete hydrogenation of ADN in HMD.
  • the hydrogenation is carried out without the addition of water.
  • Water present in the feeds - e.g. as an impurity, or in the Raney® catalyst to prevent auto-ignition - can be removed in advance.
  • ammonia or another base such as alkali metal hydroxides, e.g. in aqueous solution. If this is the case, the amount of ammonia or of the base is generally from 1 to 10% by weight, based on the oligonitrile. Ammonia is also suitable as a solvent.
  • the reaction temperature is usually 30 to 250, preferably 50 to 150 and especially 60 to 1 10 ° C.
  • the pressure is usually from 1 to 300, preferably from 2 to 160, in particular from 2 to 85 and particularly preferably from 5 to 35 bar.
  • the process can be operated continuously, semi-batch or batchwise, for which all reactor types customary for hydrogenation reactions are suitable.
  • the work-up of the reaction mixture onto the product (diamino or aminonitrile) is carried out in a customary manner, for example by distillation.
  • Whether the hydrogenation proceeds as complete or partial hydrogenation or in which ratio oligoamines (complete hydrogenation) and aminonitriles (partial hydrogenation) are present in the resulting reaction mixture depends i.a. of reaction temperature, pressure and duration, of the composition and amount of the catalyst, the type and amount of the oligonitrile, the amount of hydrogen, and the type and amount of optionally co-used additives such as ammonia or other bases.
  • a lower reaction temperature, a lower pressure, a smaller amount of hydrogen or, in particular, a shorter reaction time prefers the partial to the complete hydrogenation.
  • the catalyst preferably contains at least one metal M from groups 8 to 10 of the Periodic Table (Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt). It preferably contains as metal M iron, cobalt, nickel or mixtures thereof. Particularly preferred are cobalt and nickel, in particular nickel.
  • the metals mentioned are preferably present in the oxidation state zero, but may also have other oxidation states.
  • Metal sponge catalysts for example those according to Raney®, are particularly preferred.
  • the process is characterized in that the catalyst is a nickel sponge catalyst or a cobalt sponge catalyst (each Raney®).
  • nickel or cobalt is usually alloyed with Al, Si, Mg or Zn metal, frequently with Al, the alloy is comminuted and the metal other than nickel or cobalt is leached out with alkalis , This leaves a skeletal metal sponge, so-called Raney® nickel or Raney® cobalt, back.
  • Raney® catalysts are also commercially available, for example from Grace.
  • the catalyst may contain at least one further metal D selected from groups 1 to 7 of the periodic table.
  • the other metals D are also referred to as doping metal or promoters. By doping, one can vary the activity and selectivity of the catalyst as needed.
  • the catalyst preferably contains, as further metal D, at least one of the metals titanium, zirconium, chromium, molybdenum, tungsten, and manganese.
  • the amount of a single further metal D is usually 0 to 15, preferably 0 to 10 wt .-%, based on the metal M.
  • the catalyst may be present as such, for example as a pure metal or alloy, in the form of fine particles or as a metal sponge (Raney®). Likewise one can use it in supported form. Suitable supports are inorganic support materials such as aluminum oxide, magnesium oxide or silicon dioxide, as well as carbon. Carriers containing catalytically active or as doping metal oxides are also suitable, for example zirconium dioxide, manganese (II) oxide, zinc oxide or chromium (VI) oxide. Supported catalysts can be prepared in the usual way, for example by impregnation, co-precipitation, ion exchange or other methods. In the case of supported catalysts, the support usually constitutes from 20 to 99, preferably from 50 to 90,% by weight of the supported catalyst.
  • the catalyst is pretreated before the hydrogenation by InANDbrin- gene with a compound A.
  • Compound A is selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal bicarbonates, ammonium bicarbonates, alkaline earth metal oxocarbonates, alkali metal carboxylates, alkaline earth metal carboxylates, ammonium carboxylates, alkali metal dihydrogen phosphates, alkaline earth metal dihydrogen phosphates, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth metal phosphates and ammonium phosphate, alkali metal acetate, Alkaline earth metal acetates, ammonium acetate, alkali metal formates, alkaline earth metal formates, ammonium formate, alkali metal oxalates, alkaline earth metal oxalates, al
  • the compounds A also include the hydrates (for example those which contain the water as constitution water and / or those which contain the water as water of crystallization) and optionally basic carbonates of the abovementioned compounds or classes of compounds A.
  • the basic alkaline earth metal carbonates or oxocarbonates also includes, for example, basic magnesium carbonate Mg (OH) 2 • 4 MgCO 3 • 4 H 2 O.
  • the catalyst preferably contains 0.01 to 25, in particular 0.5 to 15 and particularly preferably 1 to 10 wt .-% alkali metal, alkaline earth metal or ammonium, based on the pretreated catalyst.
  • (alkaline earth) alkali metal or ammonium as such, i. without carbonate, bicarbonate, oxocarbonate, carboxylate, dihydrogen phosphate, hydrogen phosphate or phosphate radical, and in the case of supported catalysts, the support material is also included.
  • the alkali metal is preferably selected from lithium, sodium and potassium, in particular sodium or potassium.
  • the alkaline earth metal is preferably selected from magnesium and calcium. From the examples available now it appears that this preference is unfounded. Omitting?
  • sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate, sodium bicarbonate, potassium hydrogencarbonate, magnesium hydrogencarbonate, calcium hydrogencarbonate, ammonium bicarbonate, magnesium oxocarbonate or mixtures thereof are used as compound A.
  • phosphates or hydrogen phosphates are likewise preferred.
  • the carboxylates are preferably selected from the formates, acetates, propionates, butanoates, pentanoates, hexanoates, also dicarboxylates such as oxalates, malonates and succinates, glutarates and adipates.
  • dicarboxylates such as oxalates, malonates and succinates, glutarates and adipates.
  • corresponding acids it is meant, for example, formic acid, acetic acid, propionic acid, butyric acid, pentanoic acid, hexanoic acid, oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid.
  • alkaline earth compounds for example, 1 to 99 wt .-%
  • the pretreatment of the catalyst can be carried out outside the reactor used for the hydrogenation, or in the hydrogenation reactor before the beginning of the actual hydrogenation. Likewise, it is possible to pretreat a catalyst that has been previously used in a hydrogenation, i. You can regenerate used catalyst by contacting with the compound A.
  • the pretreatment of the catalyst takes place by bringing it into contact with a solution or suspension of the compound A.
  • Preferred solvent or suspending agent is water, but also the organic solvents already mentioned above in the hydrogenation are suitable. It is possible to use compound A as a solid and to prepare the corresponding solution or suspension by adding the solvent or suspending agent.
  • the content of such an aqueous or nonaqueous solution or suspension of compound A is usually from 1 to 90% by weight.
  • contacting in the case of a suspension hydrogenation, contacting can be effected in a simple manner by slurrying the catalyst in the solution or suspension of compound A, the amount of catalyst advantageously being from 5 to 95% by weight, based on the solution or suspension the compound A. Then you can separate the excess solution or suspension, for example by decantation or filtration.
  • the pretreated, filtered or decanted catalyst can first be washed once or several times with an alcohol, such as methanol or ethanol, and then with a hydrocarbon, for example cyclohexane, or with an ether.
  • the hydrogenation process is preferably characterized in that the catalyst is brought into contact with an aqueous solution or suspension of compound A, the catalyst is separated off and then washed with at least one organic liquid to remove the water.
  • the contacting (slurrying), separating (filtering, decanting) and washing is conveniently carried out under inert gas.
  • Pressure and temperature of incontacting are generally not critical. For example, you can work at room temperature (20 ° C) and ambient pressure.
  • the duration of the contacting is e.g. according to the desired content of the catalyst to compound A, and in particular the adsorption behavior of the catalyst, its outer and inner surface and the optionally used catalyst carrier material. It is for example 5 minutes to 5 hours, preferably 10 minutes to 2 hours.
  • the contacting can be carried out in such a way that the compound A is formed in situ before or during the treatment of the catalyst.
  • compound A * is an alkali metal, alkaline earth metal or ammonium compound other than the compounds A.
  • Carboxylates and phosphates may be alkali metal, alkaline earth metal or ammonium carbonates, bicarbonates or oxocarbonates and the hydroxides Baror ⁇ ö ⁇ gt when compound A * are water-soluble salts, for example, alkali, alkaline earth or ammonium halides, nitrates or sulfates.
  • compound A * are water-soluble salts, for example, alkali, alkaline earth or ammonium halides, nitrates or sulfates.
  • reaction with the introduced CO2 or the supplied acid form from compound A * the desired carbonates, bicarbonates or oxocarbonates, or carboxylates, dihydrogen phosphates, hydrogen phosphates or phosphates A.
  • the reaction with the CO2 or acid for example, at room temperature and Ambient pressure.
  • the process is characterized in that the compound A is formed in situ by adding to a suspension or solution containing the catalyst and a compound A * which, in the case of the carbonates, bicarbonates and oxocarbonates, is one of the compounds A various alkali metal, alkaline earth metal or ammonium compound, carbon dioxide or a carboxylic acid or phosphoric acid is introduced.
  • the contacting of the catalyst can also be carried out in other ways, for example by mixing the untreated catalyst with solid compound A, by tumbling solid compound A onto the untreated catalyst, or by spraying the untreated catalyst with a solution or suspension of compound A.
  • the catalyst pretreated with compound A ie the removal of any solvent or suspending agent used, takes place in the usual way.
  • the catalyst can also be used in moist or suspended form, for example, the pretreated catalyst can be left after washing with the organic liquid in the last used washing liquid and use this suspension.
  • oligo-amines or aminonitriles obtainable by the hydrogenation process according to the invention are likewise provided by the invention.
  • Another subject of the invention is the use of catalysts as described above for the complete or partial hydrogenation of oligo-nitriles. Preference is given to the use of the catalysts for the complete hydrogenation of alpha, omega-dinitriles to alpha, omega-diamines. It is particularly preferred that the catalyst used for the complete hydrogenation of adiponitrile to hexamethylenediamine.
  • the catalysts for the partial hydrogenation of alpha, omega-dinitriles to alpha, omega-aminonitriles. It is particularly preferred that the catalyst is used for the partial hydrogenation of adiponitrile to aminocapronitrile.
  • the invention further provides a catalyst comprising a metal from groups 8 to 10 of the Periodic Table, which is pretreated before use with a compound A selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal hydrogencarbonates, ammonium bicarbonate , Erdalkalimetalloxocarbonaten, metal carboxylates alkali, alkaline earth metal carboxylates, ammonium carboxylates, alkali metal dihydrogen phosphates, Erdalkalimetalldihydrogenphosphaten, genphosphaten Alkalimetallhydro-, Erdalkalimetallhydrogenphosphaten, did alkali metal phosphates, alkaline earth phosphates and ammonium phosphate, alkali metal acetates, Erdalkalimetallace-, ammonium, alkali metal formates, Erdalkalimetallformiaten, ammonium formate, Alkalimetalloxalaten, Erdalkalimetallox
  • the catalyst preferably has at least one of the features specified above in the description of the catalyst, in particular at least one of the features of claims 9 to 19.
  • a method for producing this catalyst is the subject of the invention. It is characterized in that a metal from groups 8 to 10 of the Periodic Table is treated with a compound A selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal bicarbonates, ammonium bicarbonate, alkaline earth metal oxocarbonates, alkali metal carboxylates, alkaline earth metal carboxylates , Ammonium carboxylates, alkali metal dihydrogen phosphates, alkaline earth metal dihydrogen phosphates, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth metal phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali metal formates, alkaline earth metal formates, ammonium formate, alkali metal ox
  • this catalyst preparation process is characterized by at least one of the features mentioned above in the description of the catalyst preparation. In particular, it has at least one of the features of claims 18 to 20.
  • the hydrogenation process according to the invention can be used to prepare oligonitriles or aminonitriles, ie. it allows for complete or partial hydrogenation. The extent of complete hydrogenation can be minimized if desired. There are few by-products and no highly toxic substances such as cyanides are used. An expensive noble metal doping of the catalyst is not required.
  • overstatistic ACN selectivities are achieved in all cases.
  • overstatistic it is meant that, compared to the calculated ACN selectivity at a given conversion, assuming that all nitrile groups are hydrogenated at the same speed ("statistically"), there is more ACN

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne un procédé d'hydrogénation d'oligo-nitriles ayant au moins deux groupes de nitrile, en présence d'un catalyseur qui est prétraité avant le début de l'hydrogénation, en étant mis en contact avec un composé A qui est choisi parmi des carbonates de métaux alcalins, carbonates de métaux alcalino-terreux, carbonates d'ammonium, carbonates d'hydrogène de métaux alcalins, carbonates d'hydrogène de métaux alcalino-terreux, carbonates d'hydrogène d'ammonium, d'oxocarbonates de métaux alcalino-terreux, carboxylates de métaux alcalins, carboxylates de métaux alcalino-terreux, carboxylates d'ammonium, phosphates de dihydrogène de métaux alcalins, phosphates de dihydrogène de métaux alcalino-terreux, phosphates d'hydrogène de métaux alcalins, phosphates d'hydrogène de métaux alcalino-terreux, phosphates de métaux alcalins, phosphates de métaux alcalino-terreux et phosphate d'ammonium, acétates de métaux alcalins, acétates de métaux alcalino-terreux, acétate d'ammonium, formiates de métaux alcalins, formiates de métaux alcalino-terreux, formiate d'ammonium, oxalates de métaux alcalins, oxalates de métaux alcalino-terreux et oxalates d'ammonium.
EP06793409A 2005-09-15 2006-09-11 Procede d'hydrogenation de nitriles en amines primaires ou aminonitriles et les catalyseurs appropries Ceased EP1926702A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200510044187 DE102005044187A1 (de) 2005-09-15 2005-09-15 Verfahren zur Hydrierung von Nitrilen zu primären Aminen oder Aminonitrilen und dafür geeignete Katalysatoren
DE200510048999 DE102005048999A1 (de) 2005-10-11 2005-10-11 Verfahren zur Hydrierung von Nitrilen zu primären Aminen oder Aminonitrilen und dafür geeignete Katalysatoren
DE200510057198 DE102005057198A1 (de) 2005-11-29 2005-11-29 Verfahren zur Hydrierung von Nitrilen zu primären oder Aminonitrilen und dafür geeignete Katalysatoren
PCT/EP2006/066228 WO2007031488A2 (fr) 2005-09-15 2006-09-11 Procede d'hydrogenation de nitriles en amines primaires ou aminonitriles et les catalyseurs appropries

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EP1926702A2 true EP1926702A2 (fr) 2008-06-04

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EP06793409A Ceased EP1926702A2 (fr) 2005-09-15 2006-09-11 Procede d'hydrogenation de nitriles en amines primaires ou aminonitriles et les catalyseurs appropries

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US (1) US20090069603A1 (fr)
EP (1) EP1926702A2 (fr)
JP (1) JP2009507888A (fr)
KR (1) KR20080045288A (fr)
BR (1) BRPI0615946A2 (fr)
CA (1) CA2624999A1 (fr)
WO (1) WO2007031488A2 (fr)

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JP5706415B2 (ja) 2009-07-31 2015-04-22 ダウ グローバル テクノロジーズ エルエルシー 脂肪族シアノアルデヒドの脂肪族ジアミンへの還元的アミノ化のための方法
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WO2007031488A3 (fr) 2007-05-18
BRPI0615946A2 (pt) 2016-11-16
JP2009507888A (ja) 2009-02-26
WO2007031488A2 (fr) 2007-03-22
US20090069603A1 (en) 2009-03-12
CA2624999A1 (fr) 2007-03-22
KR20080045288A (ko) 2008-05-22

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