Slurry hydrocarbon synthesis process with catalyst rejuvenation

Details Slurry hydrocarbon synthesis process with catalyst rejuvenation Slurry hydrocarbon synthesis process with catalyst rejuvenation

1997-05-02

1999-09-28

Geist, Gary

Chemistry: fischer-tropsch processes; or purification or recover

Including regeneration of catalyst

518700, 518715, 502 21, 502 22, 502 53, C07C 2700, B01J 2034

Patent

active

059589868

ABSTRACT:
A reversibly deactivated hydrocarbon synthesis catalyst in a hydrocarbon synthesis slurry is rejuvenated by passing the slurry into a lift pipe external of the reactor in which it contacts a hydrogen containing rejuvenating gas. The hydrogen rejuvenates the catalyst particles in the slurry and forms a mixture of a rejuvenation offgas which may contain catalyst deactivating species and a rejuvenated catalyst slurry. This mixture is passed into a gas separating and removal vessel in which the offgas is separated and removed from the slurry, which is then returned back into the reactor or elsewhere. The rejuvenating gas also acts as a lift gas to create slurry circulation up through the lift pipe and into the gas removal vessel.

REFERENCES:
patent: 5260239 (1993-11-01), Hsia
patent: 5268344 (1993-12-01), Pedrick et al.
patent: 5283216 (1994-02-01), Mitchell
patent: 5382748 (1995-01-01), Behrmann et al.
patent: 5821270 (1998-05-01), Chang et al.

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