Method for preparation of graphite fluoride by contact reaction

Details Method for preparation of graphite fluoride by contact reaction Method for preparation of graphite fluoride by contact reaction

1982-09-01

1984-03-20

Heller, Gregory A.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423439, 423445, 423449, 423489, 423496, 422198, 422236, C01B 3104, C01B 908, C01B 3130

Patent

active

044380860

ABSTRACT:
A method and apparatus for preparation of a graphite fluoride such as (CF).sub.n or (C.sub.2 F).sub.n by heterogeneous contact reaction between a carbon material such as graphite or petroleum coke and fluorine gas at about 200.degree.-550.degree. C. The carbon material in the form of small pieces such as granules or powder particles is kept in a holder having a number of openings so as to form a carbon material layer in the holder, which is placed in a reactor so as to leave gas passages around the holder. With heating, fluorine gas is forcibly passed through the gas passages without agitating the carbon material in the holder. The openings of the holder are shaped and arranged such that the fluorine gas permeates through the carbon material layer in the holder. For example, the holder is an open-type box made of either a wire screen or a perforated metal plate, or a conveyor belt made of a wire screen. This method is effective for prevention of spontaneous decomposition of the formed graphite fluoride attributed to accumulation of the heat of reaction within the reacting carbon material layer and/or mechanical shocks or vibrations to the fluorinated carbon.

REFERENCES:
patent: 2734800 (1956-02-01), Brooks
patent: 3872032 (1975-03-01), Kanemaro et al.
patent: 3929920 (1975-12-01), Komo et al.

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