Patent ID: 7227048
Filing Date: 2007-06-05
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A process for making an olefin product from an oxygenate-containing feedstock comprising: a) contacting the feedstock in a reaction zone with catalyst particles comprising a molecular sieve containing an average density of acid sites of about 0.000325 mole per gram of said molecular sieve and having an average amount of carbon on said molecular sieve ranging from about 9.9 wt.% to about 12.9 wt.% based on the weight of the molecular sieve, wherein said average density of acid sites is is determined by NMR, under conditions effective to convert the feedstock into an olefin product stream and to provide unregenerated catalyst particles, b) removing a portion of said unregenerated catalyst particles from said reaction zone and contacting said portion with a regeneration medium in a regeneration zone under conditions effective to obtain regenerated catalyst particles wherein said average amount of carbon on said molecular sieve of said regenerated catalyst particles is no greater than 9.9 wt.% based on the weight of said molecular sieve, and c) introducing said regenerated catalyst particles into said reaction zone.