Process and apparatus for multi-stage regeneration of catalyst i

Details Process and apparatus for multi-stage regeneration of catalyst i Process and apparatus for multi-stage regeneration of catalyst i

1990-04-27

1991-09-10

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 208153, 208164, 208158, 208159, 208160, 422144, 422147, 502 41, 502 43, C10G 1100, C10G 3510, B01J 2034

Patent

active

050471406

ABSTRACT:
A process and apparatus are disclosed 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 closed coke combustor vessel is added alongside an existing regenerator vessel, and spent catalyst is discharged into a transfer pot beneath the existing dense bed, then into the coke combustor. Catalyst is regenerated in a turbulent or fast fluidized bed, and discharged into the dilute phase region above the existing bubbling dense bed. The discharge line preferably encompasses, and is in a heat exchange relationship with, the spent catalyst standpipe. Discharge catalyst is collected in the bubbling dense bed surrounding the coke combustor, and may be given an additional stage of regeneration. Catalyst may be recycled from the dense bed to the transfer pot.

REFERENCES:
patent: 3412014 (1968-11-01), Mattix et al.
patent: 4574044 (1986-03-01), Krug
patent: 4789458 (1988-12-01), Haddad et al.
patent: 4820404 (1989-04-01), Owen
patent: 4851374 (1989-07-01), Yan et al.
Oil and Gas Journal, "Fluid Catalytic Cracking Report" by Amos A., Avidan, Michael Edwards, and Hartley Owen Jan. 8, 1990.

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