Patent ID: 9067902
Filing Date: 2015-06-30
Classification: C07C,C07D

Abstract:
1. A method for the epoxidation of an olefin comprising: initiating an epoxidation reaction by reacting a feed gas composition containing ethylene, oxygen, and a chloride moderator present at a concentration of from about 0.5 ppm to about 3 ppm, in the presence of an epoxidation catalyst at a temperature of about 245° C. to about 265° C.; increasing the moderator concentration to about 5 ppm to about 7 ppm and lowering the temperature to about 215° C. to about 225° C.; and maintaining the moderator concentration within the range of 5 ppm to about 7 ppm and the temperature in the range of about 215° C. to about 225° C. for a time period of about 50 hours to about 150 hours.