Preparation of ethylenoxide

1413251 Epoxidation catalysts SHELL INTERNATIONALE RESEARCH MAATSCHIPPIJ BV 5 Jan 1973 [7 Jan 1972] 689/73 Heading B1E [Also in Division C2] Catalysts comprise metallic silver on a porous, refractory support and 0.00035- 0.0030 gram equivalent weight/kilogram (based on the entire catalyst) of cations of one or more of K<SP>+</SP>, Rb<SP>+</SP> and Cs<SP>+</SP> which have been deposited coincidentally with the silver on the support. The catalysts are made by impregnating the support with a solution of silver and alkali metal compounds and reducing or by contacting the support with an alkaline aqueous solution of silver and alkali metal compounds and maintaining the mixture at 100- 500‹C in the presence of a reducing agent, preferably an amine.