Chromium-based fluorination catalyst, process for producing the

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide

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502224, 502228, B01J 2300, B01J 2712, B01J 27132

Patent

active

054948738

ABSTRACT:
A halogenated hydrocarbon having 1 to 4 carbon atoms is brought into contact with hydrogen fluoride in a gaseous phase in the presence of a catalyst prepared by firing a substance composed mainly of chromium(III) hydroxide in the presence of hydrogen at a temperature of 350.degree. to 500.degree. C. or a catalyst prepared by heat-treating the above substance in an inert gas stream at a temperature of 100.degree. to 600.degree. C. and then firing the heat-treated substance in the presence of hydrogen at the above temperature or any one of catalysts prepared by partially fluorinating the above catalysts.

REFERENCES:
patent: 2005707 (1932-08-01), Daudt et al.
patent: 3859424 (1975-01-01), Scherer et al.
patent: 3992325 (1976-11-01), Knaak
patent: 5155082 (1992-10-01), Tung et al.

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