Patent ID: 7906697
Filing Date: 2011-03-15
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A method for controlling regenerator temperature in an oxygenates-to-olefins system, comprising the steps of: a. contacting a feed comprising an oxygenate with a catalytically effective amount of a molecular sieve-containing catalyst in a reaction zone under conditions sufficient to convert said oxygenate to a product containing light olefins, and thereby forming an at least partially coked catalyst; b. conducting a portion of the at least partially coked catalyst from the reaction zone to a regenerator having a catalyst bed, a catalyst cooler, a catalyst cooler inlet, a catalyst cooler outlet, a catalyst bed height (H c. contacting a portion of the at least partially coked catalyst in the regenerator with an oxygen-containing regeneration medium at a first temperature, under conditions effective to at least partially regenerate the at least partially coked catalyst; and d. conducting a portion of the catalyst from the regenerator through the catalyst cooler inlet to the catalyst cooler to form a cooled portion of catalyst, which is then conducted through the catalyst cooler outlet back into the dilute phase of the regenerator to control temperature in the regenerator, wherein H o is greater than H i .