Method for preparing carbon monofluoride or fluorocarbon through inner circulation of fluorine

Abstract

The invention provides a method for preparing carbon monofluoride or fluorocarbon through inner circulation of fluorine. The method comprises the following steps of: (1) firstly passivating a reaction system, and then loading the pretreated graphite or carbon material into a reaction kettle with a cycling passage; (2) adding argon or nitrogen into the reaction kettle, adding fluorine to obtain the fluorine nitrogen or fluorine argon mixed gas; (3) heating the reaction kettle, setting and maintaining a reaction temperature and reaction pressure, and stopping the heating after the reaction is carried out for 1 to 70h under the inner circulation working condition; and (4) taking out the carbon monofluoride or fluorocarbon when the reaction kettle is cooled to the room temperature. The invention also provides a synthesizing device for preparing the carbon monofluoride or fluorocarbon through the inner circulation of the fluorine. The carbon monofluoride or fluorocarbon is synthesized by adopting the fluorine nitrogen mixed gas with high concentration of fluorine, the passivated reaction system, automatic control of a remote computer and a novel fluorine inner circulation process. The cost is low, the safety is high, the yield is high, and the fluorine-carbon ratio of a product is precisely controlled.

Description

technical field [0001] The invention relates to a preparation method of fluorinated graphite or fluorinated carbon, in particular to a method for preparing fluorinated graphite or fluorinated carbon by internal circulation of fluorine gas. Background technique [0002] Graphite fluoride is a graphite interlayer compound synthesized by the direct reaction of carbon and fluorine (or hydrogen fluoride). The interlayer substance is fluorine atoms, which is a covalent interlayer compound. The molecular formula is represented by CFx, where x is an indeterminate value, and its range is between 0 and 1.25. The synthesis methods of graphite fluoride can be roughly divided into high temperature synthesis method (dry method) and low temperature synthesis method (wet method). [0003] (1) High temperature synthesis method [0004] When the reaction temperature is between 375°C and 640°C, fluorine gas can react with graphite to synthesize graphite fluoride, and within this temperature ...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for preparing fluorinated graphite or carbon fluoride by internal circulation of fluorine gas, and to solve the problem of poor safety, low output, poor quality, and fluorocarbon ratio in the existing process. low disadvantage

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