Patent ID: 6416656
Filing Date: 2002-07-09
Classification: C10G

Abstract:
A process for catalytically cracking hydrocarbon stocks in a riser or fluidized bed reactor, comprising the steps of:(a) charging a gasoline stock and a catalytic cracking catalyst into a lower zone of the reactor to permit contact between the catalyst and the gasoline stock and to produce a liquefied gas-rich oil-gas mixture containing reacted catalyst; (b) introducing the liquefied gas-rich oil-gas mixture with reacted catalyst produced in step (a) into a reaction zone above the lower zone of the reactor and further introducing at least one conventional catalytic hydrocarbon feed independently into at least two sites in said upper zone, each site having a different height above the lower zone of the reactor, to produce a diesel-rich oil-gas mixture; and (c) separating the resulting oil-gas mixture produced in step (b) in a fractionation system into liquefied gas, gasoline and diesel oil products, heavy cycle oil, and slurry.