Patent ID: 11891578
Assignee: RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 2:
3. The process according to claim 2, further comprising the steps of:
i) contacting the first feedstock with the catalytic cracking catalyst in the dilute-phase transport fluidized bed to carry out the first catalytic cracking reaction;
ii) subjecting the reaction effluent from step i) and optionally the second feedstock to the second catalytic cracking reaction in the fast fluidized bed under conditions effective to produce light olefins;
iii) separating the reaction effluent from the reactor to obtain a reaction product rich in light olefins and a spent catalyst;
iv) regenerating the spent catalyst and recycling at least a portion of the resulting regenerated catalyst to step i) as the catalytic cracking catalyst; and
v) optionally, separating the reaction product to obtain dry gas, liquefied petroleum gas, gasoline, diesel oil and slurry.