Process for fast fluidized bed catalyst stripping

Details Process for fast fluidized bed catalyst stripping Process for fast fluidized bed catalyst stripping

1992-09-24

1994-02-08

Bell, Mark L.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208113, 208120, 208150, 208164, C10G 1118, C10G 3514

Patent

active

052845753

ABSTRACT:
A fluidized catalytic cracking process operates with a turbulent or fast fluidized bed (FFB) spent catalyst stripper. Higher vapor velocities in the stripper improve stripping. Preferably spent catalyst is added to the stripper via cyclone diplegs. Preferably most of the spent catalyst is added into the bed near the top of the FFB stripper is removed via the top of the stripper, to a contiguous, annular bubbling dense bed stripper surrounding the FFB stripper. Some catalyst may be removed from the base of the FFB stripper.

REFERENCES:
patent: 4921596 (1989-06-01), Chou et al.

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