Patent ID: 7414167
Filing Date: 2008-08-19
Classification: C07C

Abstract:
1. A continuous process for selective conversion of an oxygenate feed to propylene comprising the steps of: a) reacting the oxygenate feed and a first diluent in an amount corresponding to about 0.1:1 to 12:1 moles of diluent per mole of oxygenate with particles of a first dual-function catalyst, having the ability to convert oxygenates to C b) cooling and separating at least a portion of the first effluent stream in a separating zone into a vaporous fraction rich in C c) passing at least a portion of the water fraction recovered in step b) to step a) to provide at least a portion of the first diluent used therein; d) separating the vaporous fraction into a C e) charging at least a portion of the olefins contained in the C f) contacting at least a portion of the C g) passing at least a portion of the second effluent stream to step b); h) withdrawing coke-containing particles of the first dual-function catalyst from the first reaction zone, oxidatively regenerating the withdrawn catalyst particles in a first regeneration zone and passing at least a portion of the regenerated catalyst particles back to the first reaction zone; and i) withdrawing coke-containing particles of the second dual-function zeolitic catalyst from the second reaction zone, oxidatively regenerating the withdrawn catalyst particles in a second regeneration zone and returning at least a portion of the regenerated catalyst particles back to the second reaction zone.