Patent ID: 11891578
Assignee: CHINA PETROLEUM & CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 1:
2. The process according to claim 1, further comprises the steps of:
i) contacting a first feedstock with the catalytic cracking catalyst in the dilute-phase transport fluidized bed to carry out a first catalytic cracking reaction; and
ii) subjecting a reaction effluent from step i) and optionally a second feedstock to a second catalytic cracking reaction in the fast fluidized bed,
wherein the first feedstock and the second feedstock each comprises a heavy feedstock, or a light feedstock, or both, and the light feedstock is selected from the group consisting of a C4 hydrocarbon fraction, a C5-C6 light gasoline fraction, and combinations thereof, with the proviso that at least one of the first and second feedstocks comprises a heavy feedstock oil.