Apparatus for hot catalyst stripping in a bubbling bed catalyst

Details Apparatus for hot catalyst stripping in a bubbling bed catalyst Apparatus for hot catalyst stripping in a bubbling bed catalyst

1992-06-04

1997-02-11

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422145, 422146, 422147, 422190, F27B 1508, B01J 804

Patent

active

056017871

ABSTRACT:
An apparatus for multistage, hot stripping of spent FCC catalyst in a regenerator having a stripper supported by the regenerator is disclosed. A secondary stripper, under the conventional primary stripper, is heated indirectly by immersion in a dense bed of hot regenerated catalyst, or heat exchange with a dilute phase transport riser encompassing the primary stripper standpipe and secondary stripper, or by direct contact heat exchange with added hot regenerated catalyst. Vapor from the secondary stripper passes through the primary stripper without contacting spent catalyst in the primary stripper.

REFERENCES:
patent: 2900329 (1959-08-01), Osborne et al.
patent: 3661799 (1972-05-01), Cartmell
patent: 4385985 (1983-05-01), Gross et al.
patent: 4738829 (1988-04-01), Krug

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