摘要:
A catalyst comprising, based on the total weight of the catalyst,more than 6-50% by weight of cobalt, nickel or a mixture thereof,0.001-25% by weight of ruthenium,0-10% by weight of copper and0-5% by weight of promoterson a porous metal oxide carrier can be prepared by(a) impregnating the carrier with the metals, promoters or compounds thereof,(b) drying and calcining the impregnated carrier and(c) reducing the calcined carrier in a stream of hydrogen,carrier not being impregnated with halogen compounds.
摘要:
A catalyst comprises, based on the total weight of the catalyst,0.1-6% by weight of cobalt, nickel or a mixture thereof,0.001-25% by weight of ruthenium,0-10% by weight of copper and0-5% by weight of promoterson a porous metal oxide carrier.It preferably comprises 0.1-3% by weight of cobalt and 0.1-3% by weight of nickel. It can be used in hydrogenation reactions, dehydrogenation reactions or hydrogenation/dehydrogenation reactions, in particular in the amination of alkylene oxides, alcohols, aldehydes or ketones with ammonia or primary or secondary amines.
摘要:
A catalyst comprises, based on the total weight of the catalyst,0.1-6% by weight of cobalt, nickel or a mixture thereof,0.001-25% by weight of ruthenium,0-10% by weight of copper and0-5% by weight of promoterson a porous metal oxide carrier.It preferably comprises 0.1-3% by weight of cobalt and 0.1-3% by weight of nickel. It can be used in hydrogenation reactions, dehydrogenation reactions or hydrogenation/dehydrogenation reactions, in particular in the amination of alkylene oxides, alcohols, aldehydes or ketones with ammonia or primary or secondary amines.
摘要:
Amines are prepared from primary or secondary alcohols and nitrogen compounds selected from the group of ammonia, primary and secondary amines, at from 80 to 250.degree. C. under pressures from 0.1 to 40 MPa with hydrogen in the presence of a catalyst comprising zirconium, copper and nickel, wherein the catalytically active composition comprises20-85% by weight of oxygen-containing zirconium compounds, calculated as ZrO.sub.2,1-30% by weight of oxygen-containing copper compounds, calculated as CuO,14-70% by weight of oxygen-containing nickel compounds, calculated as NiO, where the molar ratio of nickel to copper is greater than 1,0-10% by weight of oxygen-containing aluminum and/or manganese compounds, calculated as Al.sub.2 O.sub.3 and/or MnO.sub.2,and no oxygen-containing cobalt or molybdenum compounds.
摘要翻译:在含有锆,铜和铜的催化剂存在下,在氢气压力为0.1至40MPa的压力下,从伯,仲醇和选自氨,伯胺和仲胺的氮化合物制备胺。 和镍,其中催化活性组合物包含20-85重量%的以ZrO 2计算的含氧锆化合物,1-30重量%的以CuO计的含氧铜化合物,14-70重量% 以NiO计算的含氧镍化合物,其中镍与铜的摩尔比大于1-10重量%,以Al 2 O 3和/或MnO 2计算的含氧铝和/或锰化合物为0-10重量% 含氧钴或钼化合物。
摘要:
A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen partial pressure in the presence or absence of a solvent comprises, after the conversion based on ADN and/or the selectivity based on ACN has or have dropped below a defined value(a) interrupting the treatment of ADN with hydrogen by stopping the feed of ADN and of the solvent, if used,(b) treating the catalyst at from 150 to 400.degree. C. with hydrogen using a hydrogen pressure within the range from 0.1 to 30 MPa and a treatment time within the range from 2 to 48 h, and(c) then continuing the hydrogenation of ADN with the treated catalyst of stage (b).
摘要:
A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen partial pressure in the presence or absence of a solvent comprises, after the conversion based on ADN and/or the selectivity based on ACN has or have dropped below a defined value (a) interrupting the treatment of ADN with hydrogen by stopping the feed of ADN and of the solvent, if used, (b) treating the catalyst at from 150.degree. to 400.degree. C. with hydrogen using a hydrogen pressure within the range from 0.1 to 30 MPa and a treatment time within the range from 2 to 48 h, and (c) then continuing the hydrogenation of ADN with the treated catalyst of stage (b).
摘要:
Preparation of alkanolamines having improved color quality by treating the alkanolamine with an effective amount of phosphorous acid or hypophosphorous acid or compounds thereof initially at elevated temperature over a period of at least 5 min (step a), and then distilling it in the presence of an effective amount of one of these phosphorus compounds (step b).
摘要:
Processes comprising: providing an aromatic alcohol; and reacting the aromatic alcohol with ammonia at a temperature of 80 to 350° C. in the presence of hydrogen and a heterogeneous catalyst to form a crude reaction product comprising a corresponding primary aromatic amine, wherein the heterogeneous catalyst comprises a catalytically active composition which, prior to reduction with hydrogen, comprises 90 to 99.8% by weight of zirconium dioxide (ZrO2), 0.1 to 5.0% by weight of an oxygen-comprising compound of palladium, and 0.1 to 5.0% by weight of an oxygen-comprising compound of platinum.
摘要:
A process for continuously preparing a primary aromatic amine by reacting a corresponding cycloaliphatic alcohol with ammonia in the presence of hydrogen at a temperature in the range from 80 to 350° C. in the presence of a heterogeneous catalyst, wherein the catalytically active composition of the catalyst, before its reduction with hydrogen, comprises from 90 to 99.8% by weight of zirconium dioxide (ZrO2), from 0.1 to 5.0% by weight of oxygen compounds of palladium and from 0.1 to 5.0% by weight of oxygen compounds of platinum.
摘要:
A hydrogenation catalyst based on an alloy of aluminum and of a transition metal is prepared by preparing a kneaded material from the alloy and an assistant, converting the kneaded material into moldings, calcining the moldings and treating the calcined moldings with an alkali metal hydroxide, by a process in which the assistant used is (a) polyvinyl alcohol and water or (b) stearic acid, and the catalyst prepared according to the invention is used for hydrogenation and hydrogenolysis, in particular the partial hydrogenation of aliphatic alpha,omega-dinitriles to aliphatic alpha,omega-aminonitriles.