Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Halogenous component
Patent
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.
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Arato Toshiaki
Azuhata Shigeru
Kanno Shuichi
Kato Akira
Kawagoshi Hiroshi
Hitachi , Ltd.
Jones Deborah
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