Reduced gas holdup in catalytic reactor

Details Reduced gas holdup in catalytic reactor Reduced gas holdup in catalytic reactor

1991-01-17

1993-06-15

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

208143, 208146, 422145, 422147, B01J 820, C10G 2306

Patent

active

052195325

ABSTRACT:
A reactor for refining resid includes an elongated vertical vessel containing a bed of catalyst which is expanded or ebullated by a liquid/gas mixture. The mixture rises in an updraft through the bed and then is recirculated with an increased velocity by an ebullating pump. To reduce gas holdup of the ebullated bed and to promote a more uniform flow, the gas is entrapped by two cascaded stages of baffles which have an internal conical shape to guide, direct, and entrap the gas. One of these two stages has a shape which creates a countercurrent in the flowing liquid to deflect any catalyst particles which might otherwise be elutriated by the increased velocity.

REFERENCES:
patent: 3414386 (1968-12-01), Mattix
patent: 3523763 (1970-08-01), Van Driesen et al.
patent: 4804458 (1989-02-01), Buttke et al.
patent: 4859430 (1989-08-01), Julian et al.
patent: 4886644 (1989-12-01), Chan et al.
patent: 4990314 (1991-02-01), Herbst et al.

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