Patent ID: 8273912
Filing Date: 2012-09-25
Classification: B01D,C07C,C07D,Y02C,Y02P

Abstract:
1. A process for the production of ethylene carbonate and/or propylene carbonate comprising: contacting an epoxidation feed comprising ethylene and/or propylene, oxygen, and an epoxidation recycle gas with an epoxidation catalyst in an epoxidation reactor to yield an epoxidation reaction product comprising ethylene oxide and/or propylene oxide; contacting the epoxidation reaction product with a lean absorbent in the presence of an bromide-containing carboxylation catalyst in an alkylene oxide absorber to yield the epoxidation recycle gas and a fat absorbent containing ethylene carbonate and/or propylene carbonate; and contacting at least a portion of the epoxidation recycle gas with a purification absorbent capable of reducing the quantity of bromide-containing impurities prior to contacting with the epoxidation catalyst.