Regeneration of spent As-poisoned lead catalysts

Details Regeneration of spent As-poisoned lead catalysts Regeneration of spent As-poisoned lead catalysts

1997-08-12

1999-08-24

Lewis, Michael

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

By heat

502 20, 502 34, 502 53, B01J 2034, B01J 3804, B01J 3810, B01J 3802

Patent

active

059424583

ABSTRACT:
Spent lead catalysts containing contaminating amounts of arsenic values, e.g., mixed oxides of lead and arsenic, are regenerated and rendered suitable for reuse by heat-treating same at a temperature of at least 550.degree. C. in the presence of a gas mixture which comprises an inert gas, e.g., Ar, N.sub.2 or He, and at least 2% by volume of at least one reducing gas, e.g., H.sub.2, CO or CH.sub.4.

REFERENCES:
patent: 3812652 (1974-05-01), Carr et al.
patent: 4962272 (1990-10-01), Cullo et al.
Database WPI, Section Ch, Derwent Publications Ltd., London, GB; Class A00, AN 68-38784Q XP002033156 & CA 824 718 A (Allied Chem Corp) Oct. 1965.

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