Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Patent
1992-08-07
1993-12-21
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
208153, 422143, 422144, 422145, 422146, 422147, B01J 826, B01J 828, F27B 1508, F27B 1516
Patent
active
052719057
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.
REFERENCES:
patent: 3563911 (1971-02-01), Pfeiffer et al.
patent: 5128108 (1992-07-01), Owen et al.
patent: 5139649 (1992-08-01), Owen et al.
Owen Hartley
Schipper Paul H.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Santiago Amalia L.
Stone Richard D.
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