Patent ID: 9452404
Filing Date: 2016-09-27
CPC Classification: B01J,C10G

Claim Text:
1. A process for the catalytic cracking of hydrocarbons, comprising: regenerating a spent catalyst comprising a first cracking catalyst having a first average particle size and density and a second cracking catalyst having a second average particle size and density in a catalyst regeneration vessel to form a regenerated catalyst comprising the first cracking catalyst and the second cracking catalyst, wherein the average particle size of the first cracking catalyst is less than the average particle size of the second cracking catalyst; contacting in co-current flow a first hydrocarbon feed with a first portion of the regenerated catalyst in a riser reactor to produce a first effluent comprising a first cracked hydrocarbon product and a spent mixed catalyst fraction; feeding a second portion of the regenerated catalyst to a second cracking reactor; concurrently in the second cracking reactor: recovering a second effluent from the second cracking reactor comprising the second cracked hydrocarbon product and the first cracking catalyst as an effluent from the upper portion of the second cracking reactor and recovering a third effluent comprising spent second catalyst from the bottom of the second cracking reactor feeding the first effluent and the second effluent to a disengagement vessel to separate the spent mixed catalyst fraction and the separated first cracking catalyst from the first and second cracked hydrocarbon products; feeding the separated catalysts from the disengagement vessel to the catalyst regeneration vessel as the spent catalyst.