Removal of carbon and vanadium or lead from spent catalysts by m

Details Removal of carbon and vanadium or lead from spent catalysts by m Removal of carbon and vanadium or lead from spent catalysts by m

1975-06-19

1977-03-29

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252411R, B01J 3700

Patent

active

040148157

ABSTRACT:
The regeneration of spent metal catalysts is accomplished by treatment with a sulfurous atmosphere at a pressure of at least 0.10 atmospheres and at a controlled high temperature of between 400-825.degree. C. (preferably between 400.degree.-715.degree. C., and most preferably between 400.degree.-600.degree. C.) for a time sufficient for the selective formation of sulfides of carbon and sulfides of vanadium or lead which sulfides are characterized by having high volatility and solubility in the sulfurous atmosphere and which vanadium and carbon sulfides are selectively removed from the catalyst within the stated temperature range.
The coke and vanadium or lead removal methods disclosed are selective in that the coke and vanadium or lead are removed without removing the active catalytic components.

REFERENCES:
patent: 2370707 (1945-03-01), Archibald
patent: 3151059 (1964-09-01), Foster
patent: 3635838 (1972-01-01), Gatsis
patent: 3645912 (1972-02-01), Gatsis

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