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
1997-10-17
1999-08-24
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 29, 502 31, 502 56, B01J 2034, B01J 3802, B01J 3856, B01J 3860
Patent
active
059424575
ABSTRACT:
A process for regenerating spent clay which includes: (1) an extraction stage wherein an organic solvent or mixture of organic solvents are thoroughly mixed with the spent clay thus separating the entrained oil from the spent clay, (2) a reactivation stage wherein the oil-free spent clay is treated with acid, and (3) a thermal polishing step wherein the acid-treated, solvent-extracted spent clay is heated at a high temperature from about 500 degrees F to about 1400 degrees F for approximately one minute to five hours, preferably 10 minutes to 4 hours.
REFERENCES:
patent: 5358915 (1994-10-01), Nebergall et al.
patent: 5468701 (1995-11-01), Nebergall et al.
Fish Ronald C.
Ghyka Alexander G.
Lewis Michael
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