METHOD OF PRODUCING LITHIUM HEXAFLUOROPHOSPHATE Russian patent published in 2011 - IPC C01B25/445 C01D15/04 C22B26/12 

FIELD: chemistry.

SUBSTANCE: invention relates to production of fluoride salts, particularly to a method of producing lithium hexafluorophosphate. The method involves mixing a lithium-containing compound which does not contain fluorine, a phosphorus-containing compound and a fluorinating agent. The phosphorus-containing compound used is phosphorus oxide which is taken in stoichiometric ratio to the lithium-containing compound. The fluorinating agent used is ammonium fluoride or hydrofluoride, which is taken in excess of up to 20% of the stoichiometric ratio. The obtained mixture is heated to 200°C until complete separation of gaseous reaction products.

EFFECT: reduced number of steps for obtaining lithium hexafluorophosphate, use of readily available, solid reagents which do not need further processing.

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