Patent ID: 6023005
Filing Date: 2000-02-08
Classification: B01J,C07C,Y02P

Abstract:
A process for converting an oxygenate feedstock into an olefin product stream comprising:(a) contacting the oxygenate feedstock with a molecular sieve catalyst under conditions effective to convert the feedstock into an olefin product stream comprising C.sub.2 -C.sub.3 olefins and to form carbonaceous deposits on the catalyst;(b) separating the catalyst having the carbonaceous deposits into a portion and a remainder;(c) contacting the portion with a regeneration medium under conditions effective to obtain a regenerated catalyst portion having less than 1.0 wt % carbonaceous deposits;(d) mixing the regenerated catalyst portion with the remainder wherein the mix of the regenerated catalyst portion and the remainder comprises 2-30 wt % carbonaceous deposits; and(e) repeating steps (a)-(d).