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1. (WO1998050488) CATALYST REJUVENATION IN HYDROCARBON SYNTHESIS SLURRY WITH REDUCED SLURRY RECONTAMINATION

Pub. No.:    WO/1998/050488    International Application No.:    PCT/US1998/008689
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Thu Apr 30 01:59:59 CEST 1998
IPC: B01J 23/94
B01J 38/48
Applicants: EXXON RESEARCH AND ENGINEERING COMPANY
Inventors: LEVINESS, Stephen, C.
MITCHELL, Willard, N.
Title: CATALYST REJUVENATION IN HYDROCARBON SYNTHESIS SLURRY WITH REDUCED SLURRY RECONTAMINATION
Abstract:
A reversibly deactivated, particulate catalyst in a hydrocarbon synthesis slurry is rejuvenated by circulating the slurry from a slurry body through a rejuvenation zone in which hydrogen contacts the slurry and rejuvenates the catalyst to form a rejuvenated catalyst slurry and an offgas which contains catalyst deactivating species. The offgas is separated and removed from the rejuvenated slurry before it is passed back into the slurry body. This avoids or minimizes contamination and recontamination of the slurry body with the deactivating species produced by the rejuvenation process.