Spent catalyst regeneration apparatus with internal and external

Details Spent catalyst regeneration apparatus with internal and external Spent catalyst regeneration apparatus with internal and external

1974-12-16

1977-07-05

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

23288S, 208164, 252417, B01J 808, B01J 818, B01J 3714

Patent

active

040337260

ABSTRACT:
An apparatus for the oxidation of coke from an FCC spent catalyst is disclosed which comprises in combination and particular arrangement a spent-catalyst receiving chamber for containing a dense-bed of fluidized catalyst in which chamber spent catalyst is oxidized to produce regenerated catalyst and partially spent regeneration gas; a transfer conduit through which said gas and said catalyst pass and in which carbon monoxide is essentially completely converted to carbon dioxide to produce spent regeneration gas and regenerated-catalyst at an increased temperature; an internal regenerated catalyst recycle means by which a portion of hot regenerated catalyst can be recycled from the transfer conduit to the spent-catalyst receiving chamber; a regenerated-catalyst receiving chamber for containing a dense-bed of regenerated catalyst and in which spent regeneration gas and regenerated catalyst are separated; and, an external regenerated-catalyst recycle means by which a portion of hot regenerated catalyst can be recycled from the regenerated-catalyst receiving chamber to the spent-catalyst receiving chamber.

REFERENCES:
patent: 3893812 (1975-07-01), Connor et al.
patent: 3898050 (1975-08-01), Strother
patent: 3953175 (1976-04-01), Pulak

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