Patent ID: 8598398
Filing Date: 2013-12-03
Classification: C07C,Y02P

Abstract:
1. A process for the preparation of ethylene and/or propylene comprising reacting an oxygenate feed, wherein the oxygenate comprises at least one oxygen-bonded alkyl group, and an olefinic co-feed in a reactor in the presence of an MTT zeolite catalyst, wherein the zeolite is in the hydrogen form and has a SAR in the range from 10 to 200, to prepare an olefinic reaction mixture; a) separating the olefinic reaction mixture into at least a first olefinic product fraction comprising a C b) recycling at least part of the second olefinic fraction as an olefinic recycle stream; wherein the olefinic co-feed is partially obtained from an olefinic refinery stream and partially obtained from a olefinic recycle stream.