Lithium hexafluorophosphate synthesis technology with high reaction efficiency

Abstract

The invention discloses a lithium hexafluorophosphate synthesis technology with high reaction efficiency. The technology is characterized by: letting lithium fluoride anhydrous hydrogen fluoride solution from a blending tank pass through an intermediate tank and transferring the solution to a constant temperature mixing cooling kettle by a lithium fluoride anhydrous hydrogen fluoride solution intermediate pump, pumping the feed liquid in the mixing cooling kettle into a reaction tower feed inlet by a circulating absorption pump, performing atomization by an atomizing nozzle, then subjecting the processed feed liquid to full heat transfer and mass transfer with phosphorus pentafluoride gas from a phosphorus pentafluoride purification section, and carrying out synthetic reaction at a temperature at 0-10DEG C and under ordinary pressure, subjecting a little unreacted phosphorus pentafluoride gas to further reactive absorption by the lithium fluoride anhydrous hydrogen fluoride solution in a tail gas balance absorber, making the reacted solution enter the mixing cooling kettle to further participate in circulating absorption reaction. And the reaction tower, the tail gas balance absorber and the constant temperature mixing cooling kettle compose an airtight reaction system. The technology provided by the invention can realize continuous and automatic production, the production cost is low and the product consistency is good.

Description

[0001] This application is a divisional application with application number: 201410674182.0, application date: 2014.11.24, and name "lithium hexafluorophosphate synthesis process". technical field [0002] The invention relates to a synthesis process of lithium hexafluorophosphate. Background technique [0003] The process of producing lithium hexafluorophosphate by the anhydrous hydrogen fluoride solvent method is one of the most widely used process routes in industrial production at present, but the phosphorus pentafluoride ventilation pipeline is easy to block during the reaction process, and the utilization rate of phosphorus pentafluoride is low; AHF loss is large; product quality The consistency is difficult to guarantee; the production process is dangerous; it is difficult to achieve continuous and automated production. Contents of the invention [0004] The object of the present invention is to provide a lithium hexafluorophosphate synthesis process capable of real...

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Problems solved by technology

[0003] The process of producing lithium hexafluorophosphate by anhydrous hydrogen fluoride solvent method is one of the most widely used process routes in industrial production at present, but the phosphorus pentafluoride ventilation pipeline is easy to block during the reaction process, and the utilization rate of phosphorus pentafluoride is low; AHF loss is large; product quality It is difficult to guarantee the consistency; the production process is dangerous; it is difficult to realize continuous and automatic production, etc.

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