Patent ID: 9388095
Filing Date: 2016-07-12
CPC Classification: B01J,C07C,C10G

Claim Text:
1. A fluidized-bed catalytic cracking process comprising: a step of reacting a hydrocarbonaceous feedstock over a fluidized bed of ascending or descending catalyst, a step of disengaging/stripping coked catalyst particles from cracked effluents, and a step of regenerating, in one or more stages, the coked catalyst particles, the regenerated catalyst particles recovered at an outlet being sent to an inlet of the fluidized bed of the reaction step, said process incorporating into the disengaging/stripping step a multi-staged process for cracking and stripping a fluidized mixture of hydrocarbons and of coked catalyst particles, said multi-staged process comprising at least two steps of cracking and one step of stripping after separation of the coked catalyst particles and of cracked effluents, wherein: said fluidized-bed catalytic cracking process is operating in a mode for maximizing distillates, said at least two steps of cracking are carried on at least one hydrocarbonaceous fluid over the separated coked catalyst particles followed by said at least one step of stripping these particles, each cracking step preceding a stripping step, injected into the first cracking step is at least one hydrocarbon chosen from petrol produced or fluid having a boiling point less than or equal to 220° C., and injected into the second cracking step are products having a boiling point of 350° C. or higher, of HCO type or slurry, recovered at a hydrocarbon fractionating step of the fluidized-bed catalytic cracking process, said first and second cracking steps being separated by a stripping step.