Abstract:
The invention relates to a method for carrying out catalyzed oxidation reactions of hydrocarbons on a catalyst that is arranged in a reactor. The method according to the invention is characterized in that the product gas flow of the catalyzed oxidation reaction is cooled directly after its exit from the reaction zone of the reactor by feeding a temperature-controlled gas flow which is fed by means of at least one feeding device to the area between the lower reactor bottom and the outlet of the product gas flow.
Abstract:
alpha , omega -Amino alcohols of the general formula I HO-CH2-X-CH2-NH2 (I> in which X represents a C1- to C20-alkylene chain which is optionally substituted by inert radicals and/or optionally interrupted by oxygen or nitrogen, are prepared by reacting alpha , omega -alkanediols of the general formula II HO-CH2-X-CH2-OH (II> in which the bridging member X has the abovementioned meanings, with ammonia and a catalyst at temperatures from 150 to 300 DEG C and pressures from 50 to 300 bar, characterised in that catalysts are employed whose catalytically active mass consists to 5 to 100% by weight of iron.
Abstract:
Process for the preparation of 3-aminomethyl-3,5,5-trimethylcyclohexylamine from 3-cyano-3,5,5-trimethylcyclohexanone by carrying out the following steps in two reaction spaces spatially separated from one another: a) reacting the 3-cyano-3,5,5-trimethylcyclohexanone in a first reaction space with excess ammonia over acid metal oxide catalysts at temperatures of 20 to 150 DEG C and pressures of 15 to 500 bar and b) hydrogenating the reaction products formed in a second reaction space with hydrogen in the presence of excess ammonia over cobalt-, nickel-, ruthenium- and/or other noble metal-containing catalysts which may contain basic components or are present on neutral or basic supports at temperatures of 60 to 150 DEG C and pressures of 50 to 300 bar.
Abstract:
A process for the preparation of a 2,2-disubstituted pentane-1,5-diamine of the formula I (see formula I) where R1 and R2, independently of one another, are C1- to C10-alkyl or C2- to C10-alkenyl or together are a C4- to C7- alkylene chain which is unsubstituted or monosubstituted to pentasubstituted by C1- to C4-alkyl, from a 2,2-di- substituted 4-cyanobutanal of the formula II (see formula II) where R1 and R2 are as defined above, comprises, in two spatially separate reaction spaces, a) reacting the 4-cyanobutanal of the formula II, in a first reaction space, with excess ammonia on an acidic heterogeneous catalyst at from 20 to 150.degree.C and at from 15 to 500 bar, and b) hydrogenating the resultant reaction product, in a second reaction space, using excess hydrogen in the presence of excess ammonia on a catalyst containing cobalt, nickel, ruthenium and/or another noble metal, if desired with a basic component or on a basic or neutral carrier, at from 60 to 150.degree.C and at from 50 to 500 bar. 2,2-Disubstituted pentane- 1,5-diamines of the formula I' (see formula III) where R1' and R2', independently of one another, are C1- to C10-alkyl or C2- to C10-alkenyl or together are a C4- to C7-alkylene chain which is unsubstituted or monosubstituted to pentasubstituted by C1-to C4-alkyl, with the proviso that R1' and R2' are not simultaneously methyl are also described.