Patent ID: 6768036
Filing Date: 2004-07-27
Classification: B01J,C07C,Y02P

Abstract:
A process for making an olefin product from an oxygenate feedstock in the presence of an oxygenate to olefin molecular sieve catalyst which comprises:a) contacting at least a portion of the catalyst with a regeneration medium in a regeneration zone; b) heating said regeneration zone to a first temperature of at least 225Â° C. (437Â° F.), c) feeding to said regeneration zone a heating fuel having an autoignition temperature less than the first temperature and containing less than 500 wppm sulfur and less than 200 wppm nitrogen, thereby causing the heating fuel to ignite and provide a heated catalyst; d) circulating said heated catalyst to the reaction zone; and e) additionally contacting the feedstock in a reaction zone with said oxygenate to olefin molecular sieve catalyst including said heated catalyst, under conditions effective to convert the feedstock into an olefin product stream.