Patent ID: 6124234
Filing Date: 2000-09-26
Classification: B01J,C07C,Y02P

Abstract:
A catalyst in which the active component is dispersed as fine particles, said catalyst being prepared by the steps which comprise:admixing a solid oxide consisting at least partly of a spinel M--Al.sub.2 O.sub.4 in an Al.sub.2 O.sub.3 matrix, wherein M is the active component selected from the group consisting of the elements of Groups Ib, VIIb and VII of the Periodic Table of the Elements, with an additional spinel-forming metal component selected from the group consisting of zinc and magnesium, or mixtures thereof, in elemental form or as an oxide or salt, and subsequently calcining the resulting mixture at temperatures of 300-1300.degree. C. and under pressures of 0.1-200 bar, whereby said active component M is liberated predominately as its oxide from the spinel by replacement with said additional spinel-forming metal component.