Apparatus for multi-stage regeneration of catalyst in a bubbling

Details Apparatus for multi-stage regeneration of catalyst in a bubbling Apparatus for multi-stage regeneration of catalyst in a bubbling

1991-08-30

1992-09-08

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

422144, 422145, 422146, 422147, F27B 1508, F27B 1514, B01J 804

Patent

active

051456540

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. Discharged 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.

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patent: 4971766 (1990-11-01), Chen et al.
Oil & Gas Journal, "Fluid Catalytic Cracking Report", by A. Avidan & M. Edwards & H. Owen.

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