| CPC C10G 11/182 (2013.01) [B01J 8/28 (2013.01); B01J 2208/00752 (2013.01); B01J 2208/00761 (2013.01); C10G 2400/20 (2013.01); C10G 2400/22 (2013.01)] | 20 Claims |
|
1. A method for increasing olefin production from a hydrocarbon feed, said method comprises:
delivering from a multi-stage catalyst regenerator a fully-regenerated catalyst from at least one catalyst full regeneration zone to a primary riser reactor;
cracking the hydrocarbon feed in the primary riser reactor to produce a first cracked product, and spent catalyst;
flowing the first cracked product and the spent catalyst from the primary riser reactor to a bed cracking reaction zone atop the primary riser reactor, wherein the bed cracking reaction zone is in fluid communication with the primary riser reactor through a distributor;
further cracking the first cracked product in the bed cracking reaction zone to produce a second cracked product including olefins;
separating the first cracked product and the second cracked product including olefins from the spent catalyst in a reactor vessel comprising the bed cracking reaction zone, wherein an outer perimeter of the bed cracking reaction zone is defined by a side wall of the reactor vessel radially outward of the primary riser reactor such that the primary riser reactor is within the outer perimeter if the bed cracking zone;
recovering the first cracked product and second cracked product including olefins; and
passing the spent catalyst from the reactor vessel to the multi-stage catalyst regenerator comprising the at least one catalyst full regeneration zone and at least one catalyst partial-regeneration zone,
wherein the spent catalyst is partially regenerated in the catalyst partial regeneration zone to provide partially-regenerated catalyst and forwarding the partially-regenerated catalyst to the catalyst full regeneration zone to provide fully regenerated catalyst.
|