摘要:
A Pd catalyst in which an .alpha.- or .gamma.-Al.sub.2 O.sub.3 as support is first treated with at least one compound of the rare earth metals and with at least one compound of manganese and then with at least one palladium compound is suitable for the preparation of a mixture of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine by hydrogenation of a correspondingly substituted aniline.
摘要翻译:首先用至少一种稀土金属化合物和至少一种锰化合物,然后与至少一种钯化合物一起处理作为载体的α或γ-Al 2 O 3的Pd催化剂适用于制备 任选取代的环己胺和任选取代的二环己胺的混合物通过相应取代的苯胺的氢化。
摘要:
Optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine can be obtained by catalytic hydrogenation of optionally substituted aniline, a catalyst being employed which contains ruthenium, palladium or a mixture of both metals, which are applied to a support of niobic acid or tantalic acid or a mixture of both. The catalyst contains the noble metal(s) in a total amount from 0.05 to 5% by weight, relative to the total weight of the catalyst. In the case of the use of both noble metals, their weight ratio to one another is 1:9-9:1.
摘要:
Di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer can be obtained by the catalytic hydrogenation of di-(4-aminophenyl)-methane at elevated temperature and elevated hydrogen pressure in the presence of a ruthenium-containing supported catalyst containing 0.05 to 5% by weight ruthenium on an Al.sub.2 O.sub.3 support which has been treated with compounds of rare earth metals and manganese.
摘要:
Diphenylamine, which can be substituted by lower alkyl and/or lower alkoxy, is obtained from the corresponding N-cyclohexylidene-aniline by catalytic dehydrogenation, a rhodium-containing catalyst being employed.
摘要:
A process for the preparation of aniline by hydrogenation of nitrobenzene in the gas phase in the presence of a catalyst containing a noble metal is described. The process can be carried out in an improved manner if the catalyst employed is palladium on graphite or petrol coke, as the support, containing 0.001-1% by weight of Pd, based on the total weight of the catalyst, it being possible for the catalyst also to contain, in addition to the Pd, 0.001-0.5% by weight of Ir and/or 0.001-0.3% by weight of Rh, all figures being based on the total weight of the catalyst.
摘要:
Acylbenzenes of the formula ##STR1## can be prepared by reaction of benzene with carboxylic acids of the formulaHOOC--R.sup.1 (II)where R.sup.1 has the meaning given in the text, using a molar ratio of benzene:carboxylic acid=1-50:1 at a temperature of 200.degree.-400.degree. C., a zeolite of the Pentasil type having an SiO.sub.2 /M.sup.2 O.sub.2 ratio of 15-500:1 being used as acid catalyst; in the latter formula, M.sup.2 is one element or more from the group comprising Al, B, Ga, In, Fe, Cr, V, As and Sb.
摘要翻译:式(I)的酰基苯可以通过苯与式HOOC-R1(II)的羧酸反应来制备,其中R 1具有本文给出的含义,使用苯:羧酸的摩尔比= 1 -50:1,温度为200-400℃,使用SiO 2 / M 2 O 2比为15-500:1的Pentasil型沸石作为酸催化剂; 在后一公式中,M2是由Al,B,Ga,In,Fe,Cr,V,As和Sb组成的组中的一种以上。
摘要:
Aromatic amines, alkylated on the N-atom, can be prepared by catalytic alkylation of aromatic amines with alcohols or the corresponding ethers or by transalkylation with aromatic amines alkylated on the N-atom, whereby niobic acid or tantalic acid is used as the catalyst.
摘要:
The present invention relates to a process for preparing 2-methyl-2,4-diaminopentane by introducing acetone, ammonia and hydrogen into a two-zone reactor at a temperature of 20.degree. to 130.degree. C. and a pressure of 30 to 250 bar, wherein the first zone contains a cationic exchange resin containing NH.sub.4.sup..sym. groups or an aluminum oxide and/or silicon oxide catalyst and the second zone contains a hydrogenation catalyst containing nickel.
摘要:
Chlorinated aromatic compounds are dechlorinated in a simple and inexpensive manner by heating them to 300.degree. to 450.degree. C. in a salt melt in the presence of water and/or water vapor and carbon.
摘要:
The plastic waste is reacted in a plasma reactor 3 under reducing conditions in a plasma containing substoichiometric oxygen at temperatures above 1200.degree. C. to form a plasma pyrolysis gas consisting of low molecular weight carbon fragments which is then cooled to temperatures below 1500.degree. C. The cooled plasma pyrolysis gas is then delivered in compressed form as a fuel of high calorific value and high temperature to a gas turbine 10 for generating power. The waste heat of this gas turbine is used to generate steam which is fed into a steam turbine 12 for generating more power. The process is suitable for plastic waste of any composition and leads to complete conversion into a gas of high calorific value so that a high exergetic efficiency level is achieved.