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Electrolytic dehydration device of anhydrous hydrogen fluoride for hexafluorophosphate synthesis

A technology of anhydrous hydrogen fluoride and hexafluorophosphate, applied in the direction of fluorine/hydrogen fluoride, hydrogen fluoride, etc.

Pending Publication Date: 2020-10-30
福建省龙德新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides an electrolytic dehydration device for anhydrous hydrogen fluoride for the synthesis of hexafluorophosphate to solve the existing problems

Method used

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  • Electrolytic dehydration device of anhydrous hydrogen fluoride for hexafluorophosphate synthesis
  • Electrolytic dehydration device of anhydrous hydrogen fluoride for hexafluorophosphate synthesis
  • Electrolytic dehydration device of anhydrous hydrogen fluoride for hexafluorophosphate synthesis

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Embodiment

[0031] as attached figure 1 to attach Image 6 As shown, the present invention provides an electrolytic dehydration device for anhydrous hydrogen fluoride for synthesis of hexafluorophosphate, a power supply, an electrolytic cell 0 with positive and negative electrodes, and an air receiving chamber 1 locked at both ends of the electrolytic cell 0. The moisture monitoring structure can check the moisture content in the hydrogen fluoride solution in real time. During the electrolysis, the power supply is kept between 4.5-7V, and the time is controlled at 15-18h;

[0032] Placed in the electrolytic cell 0 and surrounded by the guide cavity structure 2 wrapped on the outer circumference of the positive and negative poles, it can not only surround the poles to enhance the charge and discharge effect of electrons around them, but also can be located in any position in the reaction zone , improve the electrical conductivity in the whole area, and there is also a suction structure 3 ...

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Abstract

The invention discloses an electrolytic dehydration device of anhydrous hydrogen fluoride for hexafluorophosphate synthesis. The device comprises a guide cavity structure which is arranged in an electrolytic cell and surrounds and wraps the outer circumferential surfaces of positive and negative rods, and a suction structure which is movably opened and closed at the bottom of the electrolytic cell; an outlet of the suction structure is connected with an outer cavity sealing structure; the guide cavity structure comprises an outer ring and an inner ring; the positive and negative rods are vertically inserted and embedded at the joint of the outer ring and the inner ring; the guide cavity structure is arranged near the positive and negative rods of the electrolytic cell and in the hydrogen fluoride liquid circulating between the positive and negative rods, circulation of electrons in the liquid can be accelerated, the electrolysis effect between the positive electrode and the negative electrode is improved, water molecules in hydrogen fluoride can be ionized more completely, the water content in the hydrogen fluoride liquid is reduced to the minimum, and water in the hydrogen fluoride liquid is well removed.

Description

technical field [0001] The invention relates to an anhydrous hydrogen fluoride purification equipment, in particular to an electrolytic dehydration device for anhydrous hydrogen fluoride for synthesis of hexafluorophosphate. Background technique [0002] Hexafluorophosphate, especially lithium hexafluorophosphate, has become one of the important electrolytes for the manufacture of secondary lithium-ion batteries due to its unique physical, chemical and electrochemical properties. In the prior art, lithium hexafluorophosphate is generally synthesized by hydrogen fluoride liquid in a non-aqueous solvent. In the process, lithium hexafluorophosphate is synthesized by the reaction of phosphorus pentafluoride and lithium fluoride. In order to improve the purity of the electrolyte, hydrogen fluoride is dehydrated. Under normal conditions, hydrogen fluoride is a colorless, pungent-smelling toxic gas with a very strong Hygroscopicity, white smoke will be produced when exposed to air,...

Claims

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Application Information

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IPC IPC(8): C01B7/19
CPCC01B7/195
Inventor 杨瑞甫周利彬陈东林刘庭蓝茂炜
Owner 福建省龙德新能源有限公司
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