Patent ID: 7459595
Filing Date: 2008-12-02
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A process for forming light olefins, wherein the process comprises the steps of: (a) contacting an oxygenate with a molecular sieve catalyst in a reactor under conditions effective to form an effluent stream comprising light olefins and to deposit coke on the molecular sieve catalyst to form a coked catalyst comprising more than 1 weight percent carbonaceous deposits; (b) transporting the coked catalyst from the reactor to a catalyst regenerator through a conduit in a fluidized manner with a fluidizing medium comprising air and steam; (c) regenerating the coked catalyst in the catalyst regenerator to form regenerated catalyst; and (d) directing the regenerated catalyst back to the reactor wherein the coked catalyst is at least partially deactivated with coke, and wherein step (b) results in removing at least about 1 weight percent of the coke from the coked catalyst, based on the total weight of the coke on the coked catalyst.