Apparatus for fluid-bed catalytic reactions

Details Apparatus for fluid-bed catalytic reactions Apparatus for fluid-bed catalytic reactions

1990-04-16

1991-09-17

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

34 57A, 110245, 122 4D, 422146, B01J 818, F27B 1516

Patent

active

050493612

ABSTRACT:
An improved fluid-bed reaction apparatus is disclosed in which feedstock is preheated and may be at least partially converted by contacting the feedstock with spent catalyst in a preheat zone. Additional benefits include a reduction in catalyst poisons and coke production in the reaction zone. By contacting the fresh feed with hot spent catalyst, at least a portion of the coke which would otherwise form in the reactor is deposited on the spent catalyst. Temporary catalyst poisons are also sorbed onto the spent catalyst. The spent catalyst is then withdrawn from the preheat zone, stripped of entrained hydrocarbon and regenerated.

REFERENCES:
patent: 2658822 (1953-11-01), Hengstebeck
patent: 2689782 (1954-09-01), Murphree
patent: 2944963 (1960-07-01), Wilson
patent: 3856659 (1974-12-01), Owen

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