Solid-liquid separation and purification integration equipment for lithium hexafluorophate preparation

Abstract

The invention discloses solid-liquid separation and purification integration equipment for lithium hexafluorophate preparation. The solid-liquid separation and purification integration equipment comprises a heat conduction oil tank, a heat conduction oil pump, a heater, a container, a bracket, a jacket, a material outlet, a liquid discharging hole, a gear, a chain, a motor, a heat conduction oil inlet, a heat conduction oil outlet, a heat conduction oil circulating pipe, a heat conduction oil recovery pipe and a filter screen. According to the equipment, lithium hexafluorophate crystals and lithium hexafluorophate hydrogen fluoride solution are separated and further purified, an amount of equipment for realizing the process is reduced, an integration degree is higher, and the problems of quality risk, long production period and manpower waste in a middle link when multiple pieces of equipment are used for realizing solid-liquid separation and purification process in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of solid-liquid separation of lithium hexafluorophosphate, in particular to an integrated equipment for solid-liquid separation and purification of lithium hexafluorophosphate. Background technique [0002] Lithium hexafluorophosphate is a commonly used electrolyte in lithium-ion batteries. In industrial preparation, lithium hexafluorophosphate solution is generally obtained by reacting phosphorus pentafluoride and lithium fluoride dissolved in anhydrous hydrofluoric acid solution, and then lithium hexafluorophosphate is dynamically precipitated from the lithium hexafluorophosphate solution through crystallization. Dynamic crystallization obtains lithium hexafluorophosphate crystals with uniform particle size and saturated lithium hexafluorophosphate hydrogen fluoride solution. In the prior art, it is necessary to use multiple equipment to realize the solid-liquid separation and purification process. Too many...

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides an integrated solid-liquid separation and purification equipment for the preparation of lithium hexafluorophosphate, which separates and further purifies lithium hexafluorophosphate crystals and lithium hexafluorophosphate hydrogen fluoride solution, reduces the number of equipment required to realize the process, and has a higher degree of integration. High, solves the problems of quality risk, long production cycle and waste of manpower in the process of solid-liquid separation and purification in the prior art

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