Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Patent
1997-05-09
1999-05-25
Lewis, Michael
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
502 31, 502 33, B01J 3860, B01J 3852, B01J 2034
Patent
active
059069538
ABSTRACT:
A process and apparatus for rejuvenating particulate used catalysts in a single rejuvenation vessel and providing a rejuvenated catalyst material having properties that result in activity substantially equal to new catalyst. The pressurizable vertically-oriented vessel has inlet and outlet openings for the catalyst and washing liquids, and is arranged to facilitate successive solvent liquid washing, water washings, and acid treatment steps for the used particulate catalyst provided in a bed in the vessel conical-shaped lower portion which contains catalyst rotary stirring means. After rejuvenation of the used catalyst, it is withdrawn from the vessel conical-shaped lower portion downwardly through a central withdrawal conduit and control valve for further processing. The water-soluble solvent and acid treatment liquids can be usually recovered by distillation for reuse in the catalyst rejuvenation process. The solvent-washed and acid-treated catalyst is separately heated and oxidized to remove carbon deposits and provide a completely rejuvenated catalyst material.
REFERENCES:
patent: 4454240 (1984-06-01), Ganguli
patent: 4863884 (1989-09-01), Tasker et al.
patent: 5358915 (1994-10-01), Nebergall et al.
Abrams Lawrence M.
Duddy John E.
Hildebrandt Steven J.
Ghyka Alexander G.
HRI
Lewis Michael
Ritter John F.
Wilson Fred A.
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