Technology for synthesizing lithium hexafluorophosphate

A technology of lithium hexafluorophosphate and synthesis process, which is applied in the direction of phosphorus compounds, inorganic chemistry, non-metallic elements, etc., and can solve problems such as difficulty in realizing continuous production, automatic large-scale production, low utilization rate of phosphorus pentafluoride, and easy blockage of ventilation pipelines, etc. Achieve the effects of increasing travel and residence time, saving device investment costs, and improving utilization

Inactive Publication Date: 2012-06-20
YANAN BICON PHARMACEUTICAL LISTED COMPANY
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Problems solved by technology

[0002] Production of LiPF with anhydrous hydrogen fluoride as solvent 6 The process is one of the more mature production process routes at present, but the ventilation pipeline is easy to block during the reaction process, the utilization rate of phosphorus pentafluoride is low, and the loss of AHF is large, so it is difficult to realize continuous, automated, and large-scale production. After years of research and practice, a new secondary synthesis lithium hexafluorophosphate production process with high practical value and suitable for large-scale production has been explored

Method used

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  • Technology for synthesizing lithium hexafluorophosphate
  • Technology for synthesizing lithium hexafluorophosphate

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Embodiment Construction

[0012] A synthesis process of lithium hexafluorophosphate. Lithium hexafluorophosphate is prepared by reacting phosphorus pentafluoride, lithium fluoride, and anhydrous hydrogen fluoride as raw materials. The purified phosphorus pentafluoride enters the mixing reactor 1 through the gas phase suction of the mixing reactor, and is mixed with The synthetic circulating liquid is pre-reacted, and the pre-reaction product and unreacted phosphorus pentafluoride are drained by the synthetic circulating liquid to the inside of the synthesis kettle 2 for further reaction with lithium fluoride and anhydrous hydrogen fluoride to synthesize lithium hexafluorophosphate; the synthetic circulating liquid is prepared by Circulation pump 3 is drawn from the synthesis kettle and pumped into the mixing reactor.

[0013] The circulation pump that draws out the synthetic circulation liquid in the synthesis tank and pumps it into the mixing reactor is installed at the bottom of the synthesis tank.

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Abstract

The invention discloses a technology for synthesizing lithium hexafluorophosphate, which uses phosphorus pentafluoride, lithium fluoride and anhydrous hydrogen fluoride as raw material. The method comprises: sucking purified phosphorus pentafluoride into a mixing reactor by the gas phase suction of the mixing reactor, pre-reacting the purified phosphorus pentafluoride with a synthesis circulation solution, leading pre-reacted products and unreacted phosphorus pentafluoride into a synthesis kettle by the synthesis circulation solution, and obtaining lithium hexafluorophosphate by further reacted with lithium fluoride and anhydrous hydrogen fluoride. The synthesis circulation solution is led out from the synthesis kettle by a circulating pump and is pumped into the mixing reactor. The synthesized lithium hexafluorophosphate has good performance, and the technology is suitable for large-scale production.

Description

technical field [0001] The invention relates to a synthesis process of lithium hexafluorophosphate. Background technique [0002] Production of LiPF with anhydrous hydrogen fluoride as solvent 6 The process is one of the more mature production process routes at present, but there are easy blockages in the ventilation pipeline during the reaction process, low utilization rate of phosphorus pentafluoride, large AHF loss, and it is difficult to realize continuous, automated, and large-scale production. After years of research and practice, a new secondary synthesis lithium hexafluorophosphate production process with high practical value and suitable for large-scale production has been explored. Contents of the invention [0003] The object of the present invention is to provide a synthesis process of lithium hexafluorophosphate which has good working performance and is suitable for large-scale production. [0004] Technical solution of the present invention is: [0005] A...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/455
Inventor 李文建朱建军李珣珣于天鹏
Owner YANAN BICON PHARMACEUTICAL LISTED COMPANY
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