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Method for preparing high-purity graphite fluoride according to catalytic method

A fluorinated graphite, high-purity technology, applied in the field of high-purity fluorinated graphite prepared by catalytic method, can solve problems such as injury, increased production cost, equipment corrosion and personal safety, and achieve low production cost, high safety, and reduced production cost Effect

Active Publication Date: 2016-06-01
SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires an additional intercalation process and an intercalation agent recovery process. On the one hand, it increases the production cost. On the other hand, the intercalation agent will generate strong acid when it meets water, which is easy to cause corrosion to equipment and even cause harm to personal safety.

Method used

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  • Method for preparing high-purity graphite fluoride according to catalytic method
  • Method for preparing high-purity graphite fluoride according to catalytic method

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Effect test

Embodiment 1

[0045] Get flake graphite 1kg, aluminum fluoride 0.2kg and put into reactor 2 after mixing uniformly. Nitrogen gas was introduced and the temperature was raised to 120° C., and the volatile impurities were removed at constant temperature for 1 hour. The reactor 2 was heated to 300°C, and 10% by volume of fluorine gas was introduced to react. The pressure in the reactor 2 was normal pressure. After 12 hours of reaction, the heating was stopped, and nitrogen gas was introduced into the reactor 2 for replacement. After the temperature in the reactor 2 is lowered to normal temperature, the product is taken out, directly added to deionized water for stirring, and the graphite fluoride is separated from the aluminum fluoride doped therein. Fish out the floating graphite fluoride, and repeat this process until no precipitation occurs. The aluminum fluoride submerged in water is washed and dried and reused as a catalyst. The obtained fluorinated graphite was dispersed in 10% hydrofl...

Embodiment 2

[0047] Get ultrafine graphite 2kg, magnesium fluoride 0.5kg and put into reactor 2 after mixing uniformly. Introduce argon gas and raise the temperature to 150° C., and keep the temperature for 3 hours to remove volatile impurities therein. The reactor 2 was heated to 350°C, and 35% by volume of fluorine gas was introduced to react. The pressure in the reactor 2 was 0.5 MPa. After 15 hours of reaction, the heating was stopped, and nitrogen gas was introduced into the reactor 2 for replacement. After the temperature in the reactor 2 is lowered to normal temperature, the product is taken out and directly added to deionized water for stirring, so that the graphite fluoride is separated from the magnesium fluoride doped therein. Fish out the floating graphite fluoride, and repeat this process until no precipitation occurs. The magnesium fluoride submerged in water is washed and dried and used as a catalyst repeatedly. The obtained fluorinated graphite was dispersed in 15% hydrof...

Embodiment 3

[0049]Get 3kg of colloidal graphite and 1kg of calcium fluoride and mix them uniformly and put them into reactor 2. Nitrogen gas was introduced and the temperature was raised to 150° C., and the volatile impurities were removed at constant temperature for 3 hours. The reactor 2 was heated up to 400°C, and fluorine gas with a volume percentage of 40% was introduced to react. The pressure in the reactor 2 was 1.0 MPa. After 15 hours of reaction, the heating was stopped, and argon gas was introduced into the reactor 2 for replacement. After the temperature in the reactor 2 drops to normal temperature, the product is taken out, and directly added to deionized water for stirring, so that the graphite fluoride is separated from the calcium fluoride doped therein. Fish out the floating graphite fluoride, and repeat this process until no precipitation occurs. The calcium fluoride sunken into the water is washed and dried and reused as a catalyst. The obtained fluorinated graphite wa...

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Abstract

The invention discloses a method for preparing high-purity graphite fluoride according a catalytic method. The method comprises the following steps: pretreatment, fluoridation, off-gas treatment, product collection, graphite fluoride purification and catalyst recovery. Through the addition of metal fluoride as a catalyst, the activation energy of graphite and fluoride reaction is reduced, so that the reaction temperature is greatly reduced. The method disclosed by the invention has the advantages that the reaction temperature is low, the production cost is low, the process is simple, the safety is high, and the fluorine content of the prepared high-purity graphite fluoride can be flexibly changed through adjustment of reaction temperature, pressure and time, so that large-scale industrialized production of graphite fluoride is realized. The metal fluoride catalyst is insoluble in water, and can be separated from graphite fluoride according to a water-deposition method, so that the catalyst is recycled, and the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to a preparation method of fluorinated graphite, in particular to a method for preparing high-purity fluorinated graphite by a catalytic method. Background technique [0002] Graphite fluoride is a high-performance, high-efficiency, high-tech functional carbon-based material. The material itself has many unique physical and chemical properties, making it useful in many fields. Due to the extremely low interlayer force and strong thermal stability, fluorinated graphite has good lubricating properties and can be used as a high-end solid lubricant; its surface energy is very low and its hydrophobicity is extremely strong, so it can be used for waterproof and antifouling Coatings; and lithium-ion primary batteries using fluorinated graphite as the positive electrode material, the capacity can reach 6 to 12 times that of ordinary zinc-manganese batteries. Thanks to its excellent properties, graphite fluoride has always been a researc...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 方治文穆海波刘超白树鹏张敏陶京平禹磊
Owner SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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