Spent catalyst regeneration with internal and external regenerat

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

1976-11-01

1977-09-27

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

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

Patent

active

040509028

ABSTRACT:
An apparatus for the oxidation of coke from a spent fluid catalytic cracking (FCC) catalyst and for the essentially complete conversion of carbon monoxide resulting from the oxidation of coke to produce regenerated catalyst and spent regeneration gas 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 catlyst can be recycled from the regenerated-catalyst receiving chamber to the spent-catalyst receiving chamber.

REFERENCES:
patent: 3843330 (1974-10-01), Connor et al.
patent: 3844973 (1974-10-01), Stine et al.
patent: 3893812 (1975-07-01), Connor et al.
patent: 3898050 (1975-08-01), Strother
patent: 3953175 (1976-04-01), Pulak

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