Lithium hexafluorophosphate synthesis process
A technology of lithium hexafluorophosphate and synthesis process, which is applied in the direction of phosphorus halide/oxyhalide, etc., can solve the problems of difficult to realize continuous, automated production, difficult to guarantee the consistency of product quality, easy blockage of phosphorus pentafluoride ventilation pipeline, etc. The product lithium hexafluorophosphate content and output are stable, the atomization effect is good, and the floor space is small.
Active Publication Date: 2016-09-28
JIANGSU JIUJIUJIU TECH
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[0002] 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 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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[0020] A lithium hexafluorophosphate synthesis process, the lithium fluoride anhydrous hydrogen fluoride solution from the blending tank is transferred from the intermediate tank 1 by the lithium fluoride anhydrous hydrogen fluoride solution intermediate pump 2 to the constant temperature mixing cooling tank 3, and the feed liquid in the mixing cooling tank is fed by the circulation absorption pump 6 Beat to the feed port of reaction tower 4, atomize through the non-blocking high-efficiency atomizing nozzle, and conduct sufficient heat transfer, mass transfer and synthesis reaction with phosphorus pentafluoride gas from the phosphorus pentafluoride purification section, and a small amount of unreacted The phosphorus pentafluoride gas is further reacted and absorbed by the lithium fluoride anhydrous hydrogen fluoride solution in the tail gas balance absorber 5, and the reaction solution enters the mixing cooling kettle 3, and continues to enter the tower to participate in the cyc...
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The invention discloses a synthesis process of lithium hexafluorophosphate. The synthesis process comprises the following steps: lithium-fluoride anhydrous hydrogen fluoride solution from a mixing tank is transferred to a constant-temperature mixing and cooling kettle by virtue of an intermediate pump of the lithium-fluoride anhydrous hydrogen fluoride solution through an intermediate tank; feed liquor in the mixing and cooling kettle is pumped to a reaction-tower feeding port by a circulating absorption pump, and after the feed liquor is atomized by an atomizing nozzle, full heat transferring, mass transferring and synthetic reaction are carried out on the feed liquor and phosphorus pentafluoride gas from the phosphorus-pentafluoride pure-chemical section, a little amount of unreacted phosphorus-pentafluoride gas is further reacted and absorbed by the lithium-fluoride anhydrous hydrogen fluoride solution in a tail-gas balance absorber, and the reaction liquid enters the mixing and cooling kettle and continuously enters a tower to participate in the circulating absorption reaction; and the reaction tower, the tail-gas balance absorber and the constant-temperature mixing and cooling kettle form a closed reaction system. The synthesis process disclosed by the invention has the advantages that continuous and automatic production is realized, the production cost is low and the consistency of products is good.
Description
technical field [0001] The invention relates to a synthesis process of lithium hexafluorophosphate. Background technique [0002] 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 [0003] The object of the present invention is to provide a lithium hexafluorophosphate synthesis process capable of realizing continuous and automatic production and low production cost. [0004] Technical solution of the present invention is: [0005] A synthesis process of lithium hexafluorophospha...
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IPC IPC(8): C01B25/10
Inventor 李文建朱建军周新基李珣珣于天鹏
Owner JIANGSU JIUJIUJIU TECH