Process for multi-stage fast fluidized bed regeneration of catal

Details Process for multi-stage fast fluidized bed regeneration of catal Process for multi-stage fast fluidized bed regeneration of catal

1990-04-27

1992-08-18

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 208150, 208151, 208164, 208159, 208160, 422142, 502 43, 502 41, C10G 1100, C10G 3510

Patent

active

051396491

ABSTRACT:
A process and apparatus for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A coke combustor vessel, which may be partially or totally open to the dilute phase above the bubbling bed, is added to the existing regenerator vessel. Spent catalyst is discharged into the coke combustor, regenerated in a turbulent or fast fluidized bed, then discharged into the dilute phase region above the bubbling bed, either via a deflector or by simply overflowing the combustor. Regeneration of catalyst is completed in the bubbling dense bed, and/or an annular fast fluidized bed surrounding the coke combustor. Catalyst may be recycled from the dense bed to the coke combustor either by a flow line, or by adjusting relative heights of bubbling to fast fluidized bed. Staged regeneration increases coke burning capacity of the regenerator, reduces NOx emissions, and reduces catalyst deactivation.

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Oil and Gas Journal, "Fluid Catalytic Cracking Report" by Amos A. Avidan, Michael Edwards, and Hartley Owen Jan. 8, 1990.

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