Preparation method and preparation device of graphite fluoride

Abstract

The invention discloses a preparation method and a preparation device of graphite fluoride. The preparation method comprises the following steps of: (1) mixing a fluoride fused salt and graphite pretreated by hydrofluoric acid, and removing air and water in the reaction system by using an inert gas; and (2) heating and fusing the fluoride fused salt, introducing a mixed gas of fluorine gas and argon gas, and performing a reaction. The preparation method of the graphite fluoride in the invention has the advantages that the temperature of the reaction system is easy to control, and the temperature has a small fluctuation and a uniform distribution; the graphite is suspended in the fluoride fused salt in a liquid state for reaction, and the fluorine gas and the graphite are in uniform contact, thereby avoiding problems of too high temperature and even explosion due to violent local reaction and high heat release caused by nonuniform contact of the fluorine gas and the graphite in traditional graphite preparation processes; and fluoridation efficiency is high and production cost is low. The preparation device provided by the invention has the advantages of convenience to operate and easiness to control, and a reaction still has good resistance to corrosion and is capable of providing a stable and safe reaction environment in the preparation process of graphite fluoride.

Description

technical field [0001] The invention relates to a preparation method and a preparation device of fluorinated graphite. Background technique [0002] Graphite fluoride is a new type of functional material with a series of unique physical and chemical properties such as low surface energy and interlayer energy, high electrical polarity, good lubricity, and small thermal neutron absorption cross section. Oil, anti-fouling, waterproof and other aspects have been more and more widely used. [0003] The synthesis methods of graphite fluoride include high temperature gas phase synthesis method, low temperature catalytic synthesis method and solid phase synthesis method. The low-temperature catalytic synthesis method is to react graphite with pentahalide to form graphite interlayer compound, and then react with fluorine gas at low temperature to form fluorinated graphite. The synthesis temperature of the method is low, and the safety is high, but the process is complex, the operat...

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a preparation method of fluorinated graphite in order to overcome the problems of severe partial reaction, uneven temperature distribution and large fluctuation of reaction system temperature in the preparation of fluorinated graphite by existing gas-solid reaction. Preparation device

In the preparation method provided by the present invention, the temperature of the reaction system is easy to control, the temperature fluctuation is small and the distribution is uniform; it solves the problems of excessive temperature and even explosion caused by severe local reaction and large heat release in the traditional graphite preparation process, Moreover, the fluorination efficiency is high and the production cost is low; the device provided by the invention is easy to operate and easy to control, and in the process of preparing graphite fluoride, the reaction kettle has good corrosion resistance and can provide a stable and safe reaction environment

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