Regeneration apparatus

Details Regeneration apparatus Regeneration apparatus

1973-12-28

1976-04-27

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

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

Patent

active

039531759

ABSTRACT:
The apparatus 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; 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, a regenerated-catalyst recycle means by which hot regenerated catalyst can be recycled within the apparatus from the regenerated-catalyst receiving chamber to the spent-catalyst receiving chamber in amounts to control the temperature and hence the rate of coke oxidation in the spent-catalyst receiving chamber. Residual coke on regenerated catalyst can therefore be significantly reduced or controlled to low levels as desired. The CO burning rate in the transfer conduit is also increased because of the higher inlet temperature and the CO concentration in the spent regeneration gas leaving the apparatus is therefore reduced.
A particularly novel feature of my invention is the arrangement of its components which permits most existing single-vessel regeneration apparatus, in which coke is generally not oxidized at a controllable temperature and in which CO is not essentially completely converted to CO.sub.2, to be incorporated into my regeneration apparatus.

REFERENCES:
patent: 2394710 (1946-02-01), McAfee
patent: 2773015 (1956-12-01), Yoder
patent: 2929774 (1960-03-01), Smith
patent: 3208831 (1965-09-01), Belden
patent: 3607126 (1971-09-01), Pfeiffer
patent: 3607127 (1971-09-01), Pfeiffer
patent: 3677715 (1972-07-01), Morrison et al.
patent: 3843330 (1974-10-01), Conner et al.
patent: 3844973 (1974-10-01), Stine et al.

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