Abstract:
The invention relates to a method for producing aromatic amines by the catalytic hydrogenation of the corresponding aromatic nitro compound, characterized by using a copper-containing catalyst with a SiO 2 -containing carrier, the SiO 2 being produced by wet grinding and subsequent spray drying.
Abstract:
The invention relates to a method for producing optionally alkyl-substituted 1,4-butanediol by means of two-stage catalytic hydration in the gas phase, comprising the following steps: a) a gas stream of C4-dicarboxylic acid or a derivative thereof is fed into a first reactor and the gas phase is catalytically hydrated so as to obtain a product mainly containing optionally alkyl-substituted y-butyrolactone; b) the obtained product stream is fed into a second reactor and the gas phase is catalytically hydrated so as to obtain optionally alkyl-substituted 1,4-butanediol; c) the desired product is separated from intermediate products, by-products, and an optionally unreacted starting material. A catalyst comprising = 95 percent by weight of CuO and = 5 percent by weight of an oxidic carrier is used in each hydration stage. The product mixture obtained in the first hydration step is introduced into the second hydration stage without further cleaning said product mixture.
Abstract:
The invention relates to suspensions which are used to reduce odours, containing a metal-organic framework material which is porous in liquid, in addition to an atomiser and to a method for reducing odours by means of said suspensions. The invention also relates to the use of the suspension in order to reduce odours.
Abstract:
Unsaturated hydrocarbons are hydrogenated in the presence of catalysts containing copper and zinc, the active mass of which, in unreduced form, essentially consists of 10 to 95% by weight copper oxide, calculated as copper(ll) oxide (CuO), 5 to 90% by weight zinc oxide (ZnO), optionally 0.1 to 50% by weight zirconium dioxide (ZrO2) and also optionally 0.1% by weight to 50% by weight AI2O3, wherein the weight fractions total 100% by weight.
Abstract:
According to the invention, carbon monoxide is eliminated from streams of substances by adsorption on an adsorption mass that contains copper oxide and zircon oxide, but no zinc oxide. Said adsorption mass is characterised in that it contains between 70 and 99.8 % by weight of copper oxide and between 0.2 and 30 % by weight of zinc oxide, in relation to the total amount of adsorption mass.
Abstract:
The invention relates to a method for producing an organometallic building material, comprising reacting, in the presence of a base and a solvent, a fluid mixture that contains a metal salt having at least one bidentate organic compound capable of coordination with metal ions, said solvent containing at least one cyclic amide (lactam) and/or at least one cyclic ester (lactone).
Abstract:
Carbon monoxide is removed from material streams by adsorption to an adsorption composition containing oxides of copper, zinc and zirconium, the copper-containing fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 90%, and at most 97%.