Patent ID: 8257661
Filing Date: 2012-09-04
Classification: C07C,Y02P,Y10S

Abstract:
1. A system for utilizing products from DME (dimethyl ether) synthesis in converting oxygenates to olefins, the system comprising: a DME reactor that produces a DME reactor effluent, wherein the DME effluent includes DME, water, and methanol; a liquid gas separator that receives the DME reactor effluent and separates carbon dioxide gas from the DME reactor effluent to produce a degassed effluent stream; a DME column that receives the degassed effluent stream and produces a DME feedstock and a solvent stream, wherein the solvent stream includes methanol and water; an oxygenate to olefin reactor that receives the DME feedstock and produces an olefin containing effluent, wherein the olefin containing effluent further includes oxygenates; and a solvent contacting zone that contacts at least a portion of the olefin containing effluent with the solvent stream to produce an olefin containing raffinate stream and an oxygenate containing extract.