Lithium hexafluorophosphate production plant

Abstract

The invention discloses a lithium hexafluorophate production device. A lithium hexafluorophate synthesis kettle is connected with a synthesis kettle material transfer pump; the synthesis kettle material transfer pump is connected with an atomization nozzle in a drying tower through a conveying pipe; the tower wall of the drying tower is divided into multiple sections, and the temperatures of the multiple sections of the tower wall are gradually increased from top to bottom; the temperature of each section of the tower wall is kept constant, and a top outlet of the drying tower is connected with an anhydrous hydrogen fluoride condenser and a phosphorus pentafluoride reactor through a mass flowmeter; the anhydrous hydrogen fluoride condenser is connected with an anhydrous hydrogen fluoride storage tank; the anhydrous hydrogen fluoride storage tank is connected with the lithium hexafluorophate synthesis kettle; the phosphorus pentafluoride reactor is connected with a gas buffer tank; the gas buffer tank is connected with the lithium hexafluorophate synthesis kettle; the lithium hexafluorophate synthesis kettle is connected with an exhaust gas absorption device; a bottom outlet of the drying tower is connected with a spiral conveyer; and the spiral conveyer is connected with a dryer. The lithium hexafluorophate production device is reasonable in structure and high in working performance.

Description

technical field [0001] The invention relates to a lithium hexafluorophosphate production device. Background technique [0002] Lithium hexafluorophosphate, as the main electrolyte of lithium-ion secondary batteries, is mainly produced by dry method and wet method, and the anhydrous hydrogen fluoride solvent method in the wet method is currently the mainstream production method, accounting for more than 50% of the existing production capacity. It has made a certain contribution to the development of the lithium battery industry, but there are still large power consumption, high raw material consumption, and complex production processes in the production process, especially the high safety risks of synthesis, crystallization, separation, and drying processes, which are harmful to the environment. Large, difficult to achieve continuous, automated production, unsatisfactory quality consistency and other defects. Contents of the invention [0003] The object of the present inv...

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Problems solved by technology

[0002] Lithium hexafluorophosphate, as the main electrolyte of lithium-ion secondary batteries, is mainly produced by dry method and wet method, and the anhydrous hydrogen fluoride solvent method in the wet method is currently the mainstream production method, accounting for more than 50% of the existing production capacity. It has made a certain contribution to the development of the lithium battery industry, but there are still large power consumption, high raw material consumption, and complex production processes in the production process, especially the high safety risks of synthesis, crystallization, separation, and drying processes, which are harmful to the environment. Large, difficult to achieve continuous and automated production, unsatisfactory quality consistency and other defects

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