Abstract:
A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkylene with an oxygen-containing gas is disclosed and comprises contacting a silver-containing support with a solution comprising a metal-containing promoter other than alkali metals or alkaline earth metals. The solution is chosen so that the metal-containing promoter has an increased affinity to the silver-containing carrier relative to its affinity to the carrier without silver. Alkene epoxidation catalysts and alkene epoxidation processes are also disclosed.
Abstract:
Catalysts for the production of alkylene oxide by the epoxidation of alkene with oxygen in the presence of an efficiency enhancing gaseous member of a redox-half reaction pair comprise a silver impregnated support containing an efficiency enhancing amount of at least one efficiency-enhancing salt of a member of a redox-half reaction pair and a sufficient amount of stability-enhancing component to provide enhanced catalytic stability as compared to a similar catalyst which does not contain such stability-enhancing component.