Method for treating organohalogen compounds with catalyst

Details Method for treating organohalogen compounds with catalyst Method for treating organohalogen compounds with catalyst

1995-12-18

1998-06-02

Jones, Deborah

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Halogenous component

4232451, 4232453, 502309, 588206, C01B 700

Patent

active

057595046

ABSTRACT:
A treating method for decomposing organohalogen compounds such as chlorofluorocarbons (CFC), trichloroethylene, methyl bromide, halon, and the like, effectively, with a high activity of catalyst is provided.
Organohalogen compounds are decomposed by contacting at a temperature in a range of 200.degree..about.500.degree. C. with catalyst which comprises titania and tungsten oxide by an atomic ratio of Ti and W in a range from 20 mol % to 95 mol % Ti and from 5 mol % to 80 mol % W, and at least surface of the titania is covered with porous layer of tungsten oxide.
In accordance with the present invention, organic compounds containing any of fluorine, chlorine, and bromine can be decomposed with a high efficiency, and the activity of the catalyst can be maintained for a long time.

REFERENCES:
patent: 4085193 (1978-04-01), Nakajima et al.
patent: 5176897 (1993-01-01), Lester
patent: 5292704 (1994-03-01), Lester
patent: 5430230 (1995-07-01), Mitsui et al.
patent: 5582809 (1996-12-01), Rikimaru et al.

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