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

摘要

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° C. results in the production of highly fluorinated CF.sub.x ; X≧1 or (C.sub.y F.sub.x Cl. sub.z). sub.n ;x≧1.0, y=1.PPIn 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°-300° 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.