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

Claim 8:
9. The process according to claim 2, wherein the fast fluidized bed comprises, from bottom to top, the full dense-phase reaction zone and a transition section, the full dense-phase reaction zone is in a form of an equal-diameter or varied-diameter hollow column with an approximately circular cross-section, an open bottom end and an open top end, the dilute-phase transport fluidized bed is in communication with the bottom end of the full dense-phase reaction zone, the top end of the full dense-phase reaction zone is in communication with an outlet section of the reactor via the transition section,
wherein a cross-sectional diameter of the bottom end of the full dense-phase reaction zone is greater than or equal to the diameter of the dilute-phase transport fluidized bed and the cross-sectional diameter of the top end of the full dense-phase reaction zone is greater than the diameter of the outlet section, and the bottom or a side wall of the full dense-phase reaction zone is provided with one or more inlets for supplementary catalyst, each independently disposed at a location within about 0-90% of a total height of the fast fluidized bed.