Patent ID: 7205447
Filing Date: 2007-04-17
Classification: C07C,Y02P

Abstract:
1. A process for converting oxygenates to olefins which comprises at least one of: 1) exposing an oxygenate-containing feed with an olefin generation catalyst under conditions sufficient to provide a first product stream which contains water, carbon dioxide, methane, ethane, C 2) compressing and cooling said first product stream in at least one stage to provide a compressed and cooled product stream; 3) separating water from said compressed and cooled product stream in a separator column from which a water-rich stream is taken as bottoms and a water-depleted product stream is taken as overhead; 4) removing carbon dioxide from said water-depleted product stream in a caustic scrubber from which a carbon dioxide-rich stream is taken as bottoms and a carbon dioxide-depleted product stream is taken as overhead; 5) drying said carbon dioxide-depleted product stream in a dryer to provide a dried product stream; 6) demethanizing said dried product stream in a demethanizer from which a methane-rich stream is taken as overhead and a methane-depleted product stream is taken as bottoms; and 7) deethanizing said methane-depleted product stream in a deethanizer from which a C contacting at least one of said product streams from steps 2 through 7 with a metal oxide-containing catalyst in the presence of a C