A method for producing an alkali metal hexafluorophosphate, a method for producing an alkali metal hexafluorophosphate, a method for producing an electrolytic concentrate containing an alkali metal hexafluoride, and a method for producing a secondary battery.

摘要

PROBLEM TO BE SOLVED: To produce a hexafluoric acid alkali metal salt, a hexafluoric acid alkali metal salt powder, and a hexafluoric acid alkali metal salt, which can improve the yield and purity while reducing the cost. Provided are a method for producing a containing electrolytic concentrate and a method for producing a secondary battery. SOLUTION: A method for producing an alkali metal hexafluorophosphate is to react an alkali metal fluoride with phosphorus pentafluoride in a haloformate solvent represented by the following formula to form an alkali metal hexafluoride phosphate. Including the stage of obtaining. (X is a halogen group, R is an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, or an aryl group having 5 to 6 ring atoms.) [Selection diagram] FIG.