High-Purity Lithium Hexafluorophosphate

摘要

The present invention relates to a process for preparing high-purity, especially low-chloride, lithium hexafluorophosphate, especially in the form of solutions thereof in organic solvents, proceeding from lithium fluoride and phosphorus pentafluoride.

主权项

1. A process for preparing solutions comprising lithium hexafluorophosphate, the process comprising the steps of:
a) contacting solid lithium fluoride with a gas comprising phosphorus pentafluoride to obtain a reaction mixture comprising lithium hexafluorophosphate and unconverted lithium fluoride; b) contacting the reaction mixture formed in a) with an organic solvent, causing the lithium hexafluorophosphate formed to go at least partly into solution; and c) removing solid constituents from the solution comprising lithium hexafluorophosphate.