CATALYST FOR HYDROGENATION OF UNSATURATED COMBINATIONS AND METHOD OF ITS PREPARATION

摘要

A copper chromite hydrogenation catalyst of enhanced activity is obtained by an ante-pre-reduction treatment in which a copper chromite catalyst precursor is soaked in a reducing atmosphere at temperatures below a pre-reduction temperature (typically about 140 DEG C) at which appreciable pre-reduction of the catalyst can be detected. This catalyst is characterised by particles of reduced copper substantially all of which have an average particle size of less than about 300 x 10<-><1><0>m (300 ANGSTROM ), which have an average particle size of less than about 100 x 10<-><1><0>m (100 ANGSTROM ), and which are substantially uniformly distributed on a chromium-containing support. Typically such catalysts exhibit a copper surface area of about 18.5 m<2>/g as determined by N2O decomposition at 20 DEG C, compared to a corresponding copper surface area of 4.5 m<2>/g for a catalyst which has been produced by conventional pre-reduction of the same catalyst precursor.