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Low temperature method for producing graphite fluoride

A technology of graphite fluoride and production method, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of high temperature, difficult temperature control, unsuitable for large-scale production, etc., and achieve high utilization rate of raw materials Effect

Inactive Publication Date: 2004-11-10
CHENGDU XINYUAN CHEM DEV
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Problems solved by technology

The domestic method for producing fluorinated graphite is basically to directly react fluorine gas and graphite in a high-temperature closed container at about 600 degrees Celsius to obtain fluorinated graphite, referred to as the high-temperature method. On the one hand, the temperature must be accurate and difficult to control. On the other hand, due to the high temperature, there is a risk of explosion, so it is not suitable for large-scale production; in addition to the high-temperature method, the main method for producing graphite fluoride abroad is the plasma synthesis method, that is, under certain conditions, fluorine gas is converted into Plasma state, and then react with graphite to obtain fluorinated graphite. This method requires a plasma generator, the temperature is not easy to control and the cost is high, and there are certain limitations in mass production.

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  • Low temperature method for producing graphite fluoride

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the present invention will be further described:

[0013] In the accompanying drawings, first, put the graphite in hydrochloric acid and soak it for 3-5 hours, take it out and dry it, then put it into a certain concentration of hydrogen peroxide and soak it for 3-4 hours, take it out and dry it, and then get expanded graphite; Put more than 99% of the antimony powder into the closed container 1, heat it to 150-200 degrees Celsius and keep this temperature, feed the fluorine gas with a concentration of 50-90% into the closed container 1, and let the air in the closed container 1 The pressure is kept below 0.1Mpa, so that the antimony powder in the closed container 1 reacts with fluorine gas to obtain liquid antimony pentafluoride, whose molecular formula is SbF 5 .

[0014] Then, put the above-mentioned expanded graphite into another closed container 2, vacuumize, heat to 110-150 degrees Celsius and keep a constant tempera...

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Abstract

The invention discloses a low-temperature process for producing graphite fluoride comprising, immersing graphite with hydrochloric acid and hydroperoxide to obtain expanded graphite, reacting with fluorine gas of a finite concentration and Sb in sealed container to obtain antimony pentafluoride, placing the expanded graphite and antimony pentafluoride into sealed container to obtain intercalation graphite, placing intercalation graphite into confined reaction stove, letting in fluorine gas for reaction. The process according to the invention increases the utilization ratio of the fluorine gas.

Description

technical field [0001] The invention relates to a low-temperature production method of fluorinated graphite, which belongs to the processing field of fluorinated graphite. technical background [0002] Graphite fluoride is mainly used in aerospace and national defense in China, such as lubricants for aerospace vehicles and aircraft engines. If fluorinated graphite is used as the battery electrode active material, the battery produced is much better than ordinary graphite as the battery electrode active material. On the one hand, the discharge is stable, and the voltage during the discharge process is almost unchanged until the voltage suddenly drops to zero after discharge. On the other hand, the capacity is high, which is 5-10 times that of the general battery capacity. Therefore, graphite fluoride will be widely used in the future. [0003] At present, there is no large-scale production of graphite fluoride in China, and only a few foreign countries can mass-produce it. ...

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Application Information

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IPC IPC(8): C09C1/46C09C3/06
Inventor 彭钢
Owner CHENGDU XINYUAN CHEM DEV
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