Low temperature synthesis of graphite based carbon fluoride and

Details Low temperature synthesis of graphite based carbon fluoride and Low temperature synthesis of graphite based carbon fluoride and

1988-04-28

1989-01-03

Doll, John

Chemistry of inorganic compounds

Carbon or compound thereof

Binary compound

423414, 423489, 423466, C01B 3100, C01B 908, C01B 724

Patent

active

047956240

ABSTRACT:
The preparation of carbon fluoride and carbon fluoride chloride from a graphite intercalate is described. Treatment of group V-A pentahalide intercalates of graphite with fluorine or fluorine/chlorine gas mixtures at a temperature of about 300.degree. C. results in the production of highly fluorinated CF.sub.x ; X.gtoreq.1 or (C.sub.y F.sub.x Cl.sub.z).sub.n ;x.gtoreq.1.0, y=1.
In the process, carbon fluoride or carbon fluoride chloride can be prepared from a highly ordered graphitic carbon at a temperature substantially lower than that of the decomposition temperature of the product, CF.sub.x or (C.sub.y F.sub.x Cl.sub.z).sub.n. In particular, carbon fluoride or carbon fluoride chloride is prepared from a group V-A pentahalogen intercalate and fluorine gas or fluorine/chlorine gas mixtures at temperatures in the order of 250.degree.-300.degree. C. The process provides a controlled, reproducible method of preparing a carbon fluoride or carbon fluoride chloride material from a graphite feedstock having fluroine-to-carbon ratios of 1 or greater from the pentahalide compound and fluorine gas or fluroine/chlorine gas mixtures at temperatures substantially removed from the decomposition temperature of the final product, thus eliminating the potential of an explosive reaction or the formation of unstable by-products.

REFERENCES:
patent: 3674432 (1972-07-01), Margrave et al.
patent: 3950262 (1976-04-01), Lalancette
patent: 4423261 (1983-12-01), Watanabe et al.
Chemical Abstracts, vol. 85, 1976; p. 132.

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