Method for producing lithium difluorophosphate in economical manner
AssigneeEvs Technologies, Inc.
InventorKwang Min LIM
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Abstract
The present invention relates to an economical method for producing lithium difluorophosphate, wherein the method for producing lithium difluorophosphate can economically produce lithium difluorophosphate having a high yield of 80% or more and a high purity of 99% or more through a simple method without using expensive reagents and without complicated processes, and has the advantage that, by quantitatively introducing an aqueous solution of hydrofluoric acid, no additional introduction of water is required, and since excessive hydrofluoric acid gas is not used, the danger of the production process and the process and danger of treating excessive hydrofluoric acid gas after production can be reduced.
Claims12
A method for producing lithium difluorophosphate, comprising:
- cooling a mixture obtained by mixing a phosphoryl halide compound (POX3) with an organic solvent;
- and
- adding an aqueous hydrofluoric acid solution and a lithium compound to the cooled mixture and allowing them to react to produce lithium difluorophosphate powder;
- wherein the halide (X) of the phosphoryl halide compound (POX3) is at least one selected from the group consisting of fluoride (F), chloride (Cl), bromide (Br), and iodide (I).
Dependencies are inferred from the claim text.