Catalyst regeneration

Details Catalyst regeneration Catalyst regeneration

1984-02-03

1991-02-19

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422310, B01J 818

Patent

active

049942395

ABSTRACT:
Nozzle designs and processes introducing the regeneration air into a catalytic cracking unit are disclosed which reduce the probability of erosion induced nozzle failures. Novel features include nozzle length, tip design, and orientation with respect to the air headers.
In one aspect of the invention at least one of the nozzles is positioned substantially vertically downwardly. In another aspect of the invention at least one of the nozzles has a length greater than the outside diameter of the pipe. In another aspect of the invention at least one of the nozzles is provided with a beveled tip. In still another aspect of the invention, at least one of the nozzles is provided with a baffle on its tip.

REFERENCES:
patent: 3298793 (1967-01-01), Mallison
patent: 4138219 (1979-02-01), Colvert et al.
patent: 4150090 (1979-04-01), Murphy et al.
patent: 4259925 (1981-04-01), Barnert et al.
patent: 4289729 (1981-09-01), Myers et al.
patent: 4317798 (1982-03-01), Worley
patent: 4322384 (1982-03-01), Sutton
patent: 4392943 (1983-07-01), Euzen et al.
patent: 4443551 (1984-04-01), Lionetti et al.
Venuto, Paul B and Habib, Thomas, Jr. "Fluid Catalytic Cracking with Zeolite Catalysts", New York, M. Dekker, 1979.

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