Patent ID: 7279012
Filing Date: 2007-10-09
Classification: C07C,Y02P

Abstract:
1. A process for producing olefins comprising: (a) providing a vapor product stream from an oxygenate to olefin reaction, said vapor product stream comprising C (b) cooling said vapor product stream to provide a first vapor effluent stream comprising no more than 10 wt. % water, and a liquid water-rich stream; (c) compressing the first vapor effluent stream and a first wash flash vapor stream from a first suction pressure to a second pressure greater than said first pressure to form a second vapor effluent stream; (d) cooling the second vapor effluent stream to form a cooled second effluent stream that is at least partially in the vapor state; (e) washing at least part of the cooled second effluent stream with a liquid alcohol-containing stream, at a third pressure greater than the first suction pressure but not greater than the second pressure, to produce a wash liquid stream comprising C (f) exposing the wash liquid stream to a pressure of at least the first suction pressure but less than the third pressure to form a first wash flash liquid stream and said first wash flash vapor stream, said first wash flash vapor stream being provided for compression (c).