Fluorination catalyst regeneration

Details Fluorination catalyst regeneration Fluorination catalyst regeneration

1992-07-17

1993-07-13

Konopka, Paul E.

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

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

502 37, 570168, 570169, B01J 2732, B01J 3846, B01J 3844, C07C 1700

Patent

active

052273504

ABSTRACT:
A method for regenerating a used fluorination catalyst such as a chromium-containing compound comprises contacting the used catalyst at a temperature of 300.degree. C. to 500.degree. C. with a mixture of an oxidizing agent, especially air, and hydrogen fluoride and optionally an inert diluent such as nitrogen, said mixture containing up to 30% of oxidizing agent on a molar basis. The method obviates chromium loss during regeneration/refluorination of spent catalyst and provides heated hydrogen fluoride for use directly in fluorination reactions.

REFERENCES:
patent: 2745886 (1956-05-01), Ruh et al.
patent: 3660307 (1972-05-01), Scherer et al.
patent: 4145311 (1979-03-01), von Halasz et al.
patent: 4578369 (1986-03-01), Muller et al.

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