A METHOD FOR THE START-UP OF AN EPOXIDATION PROCESS AND A PROCESS FOR THE EPOXIDATION OF AN OLEFIN

摘要

A method for the start-up of a process for the epoxidation of an olefin, whi ch method comprises contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising th e silver in cationic form, with a feed comprising oxygen at a temperature of t he catalyst bed above 260 ~C for a period of at most 150 hours, and subsequentl y decreasing the temperature of the catalyst bed to a value of at most 260 ~C, and a process for the epoxidation of an olefin, which process comprises contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising the silver i n cationic form, with a feed comprising oxygen at a temperature of the catalys t bed above 260 ~C for a period of at most 150 hours, and subsequently decreasing the temperature of the catalyst bed to a value of at most 260 ~C and contacting the catalyst with the feed comprising the olefin and oxygen.< /SDOAB>