Patent ID: 7102049
Filing Date: 2006-09-05
Classification: C07C,Y02P

Abstract:
1. A process for producing olefin(s) from oxygenates, the process comprising the steps of: (a) contacting an oxygenate feed stream with an oxygenate-to-olefin catalyst to produce an effluent stream comprising water, carbon dioxide and olefin(s); (b) quenching the effluent stream with a quench medium having a pH above 7.0 to produce an olefin stream comprising olefin(s) and a quench bottoms stream containing carbon dioxide; (c) lowering pH of the quench bottoms stream to separate carbon dioxide from the quench bottoms stream and form a degasified quench bottoms stream; and (d) fractionating oxygenate hydrocarbons from the degasified quench bottoms stream.