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US 9,067,902 B2Granted
Epoxidation process with post-conditioning step
AssigneeScientific Design Company, Inc.
InventorsAshok S. Padia, Hassan Eisa Al-Ahmadi
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Abstract
A method for the epoxidation of an olefin comprising the steps of reacting a feed gas composition containing an olefin, oxygen, and a moderator having a post-conditioning step where the catalyst is exposed to reactor feed having a chlorides concentration of from about 5 ppm to about 7 ppm and at a temperature of about 215° C. to about 225° C.
Claims10
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.
1 more element
Dependencies are inferred from the claim text.