Slurry hydrocarbon synthesis process with multistage catalyst re

Details Slurry hydrocarbon synthesis process with multistage catalyst re Slurry hydrocarbon synthesis process with multistage catalyst re

1997-05-02

1998-10-13

Geist, Gary

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

518715, 502 21, 502 22, 502 53, C07C 2700

Patent

active

058212701

ABSTRACT:
A reversibly deactivated hydrocarbon synthesis catalyst in a hydrocarbon synthesis slurry is rejuvenated by successively passing the slurry through at least two rejuvenation stages external of the slurry reactor, each of which comprises a rejuvenation zone followed by an offgas removal zone. This is accomplished by using a lift pipe outside the reactor into which slurry from the reactor is passed and contacts a catalyst rejuvenating gas to partially rejuvenate the catalyst particles and form a rejuvenation offgas. The gas and slurry mixture are passed into a vessel in which the gas is removed from the slurry. Rejuvenation gas is bubbled into the slurry in the vessel to further rejuvenate the catalyst. A gas removing downcomer removes gas from the slurry in the vessel before it is passed back into the reactor. The rejuvenation gas also acts as a lift gas in the lift pipe.

REFERENCES:
patent: 5260239 (1993-11-01), Hsia
patent: 5268344 (1993-12-01), Pedrick et al.
patent: 5283216 (1994-02-01), Mitchell
patent: 5288673 (1994-02-01), Behrmann et al.
patent: 5382748 (1995-01-01), Behrmann et al.

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