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Method for preparing graphite fluoride at low temperature

A fluorinated graphite, low temperature technology, applied in the field of non-metallic materials, can solve the problems of high equipment requirements, high production risk, low fluorocarbon ratio of fluorinated graphite, etc., and achieve the effect of high purity

Active Publication Date: 2013-04-17
东莞市致格电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic method of preparing fluorinated graphite mainly adopts high-temperature direct synthesis method, which will produce a large amount of gaseous by-products during the preparation process, with high production risk, high requirements for equipment, and the fluorine-carbon ratio of fluorinated graphite is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] Preparation of absolute ethanol: Add 1L of 95% ethanol and 150g of quicklime to a 2L round-bottomed flask, shake well, plug it tightly with a rubber stopper and leave it overnight; add a condenser tube to the round-bottomed flask containing the overnight materials, and assemble Reflux device and heat reflux on the electric heating mantle for 2 hours; after the reflux is over, when the reaction system is slightly cooled, it is converted into a distillation device and heated by the electric heating mantle to distill anhydrous ethanol for use.

[0013] The graphite flakes, ferric fluoride and potassium hexafluoromanganate are put into a vacuum desiccator and vacuum dried for 8-12 hours for use.

Embodiment 1

[0015] After adding 100g flake graphite and 20g ferric fluoride into the dry reactor, feed nitrogen (in other embodiments, any inert gas can be fed into) to exhaust the air in the reactor, and then use a syringe to react under nitrogen flow. Inject 633mL of absolute ethanol and 143mL of bromine trifluoride in sequence, and stir at 25°C for 50 minutes; then obtain a solid substance by vacuum filtration, wash the solid substance repeatedly with water until the pH of the washing liquid is 7.0, then suction filter and vacuum dry Obtain graphite intercalation compound; 100g graphite intercalation compound and 175g potassium hexafluoromanganate are thoroughly mixed and put into a dry reactor, and nitrogen gas is passed into the reactor (in other embodiments, any Inert gas) until the air in the reactor is exhausted, inject 61mL antimony pentafluoride into the reactor with a syringe, then raise the temperature to the reaction temperature of 160°C, stop heating after 1.5h and cool natur...

Embodiment 2

[0017] After adding 100g flake graphite and 10g ferric fluoride into the dry reactor, feed nitrogen (in other embodiments, any inert gas can be fed into) to exhaust the air in the reactor, and then use a syringe to react under nitrogen flow. Inject 850mL of absolute ethanol and 90mL of bromine trifluoride in sequence, and stir at 25°C for 50 minutes; then obtain a solid substance by vacuum filtration, wash the solid substance repeatedly with water until the pH of the washing liquid is 7.0, then suction filter and vacuum dry Obtain graphite intercalation compound; 100g graphite intercalation compound and 150g potassium hexafluoromanganate are thoroughly mixed and put into a dry reactor, and nitrogen gas is passed into the reactor (in other embodiments, any Inert gas) until the air in the reactor is exhausted, inject 55mL antimony pentafluoride into the reactor with a syringe, then raise the temperature to the reaction temperature of 160°C, stop heating after 1.5h and cool natura...

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Abstract

The invention discloses a method for preparing graphite fluoride at low temperature. The method comprises the following steps: using ferric fluoride as a catalyst, and performing reaction of crystalline flake graphite and bromine trifluoride at low temperature to generate a graphite intercalation compound; then, performing reaction of potassium manganese hexafluoride and antimony pentafluoride to generate fluorine; and performing reaction of the fluorine generated and the graphite intercalation compound to form the graphite fluoride with high fluorine content. Through purifying treatment by a solvent, the prepared graphite fluoride is high in purity.

Description

technical field [0001] The invention relates to the technical field of non-metallic materials, in particular to a method for preparing fluorinated graphite at low temperature. Background technique [0002] Graphite fluoride is one of the research hotspots of high-tech, high-performance, and high-efficiency new carbon / graphite materials in the world today. With its excellent performance and unique quality, it is a wonderful flower in the family of functional materials. Graphite fluoride has excellent lubricity, and its lubricating performance is better than that of general-purpose graphite and molybdenum disulfide. It has a smaller friction coefficient and a longer service life when it is dry or humid at high temperature (400-500 degrees). Due to the low surface energy of fluorinated graphite, it is often mixed with lubricating oil, grease or resin, and fluorinated graphite powder can also be suspended in lubricating oil or added to gasoline. Fluorinated graphite is used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B32/22
Inventor 赵东辉戴涛周鹏伟
Owner 东莞市致格电池科技有限公司
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