FIELD: chemistry.
SUBSTANCE: group of inventions refers to inorganic chemistry. For the preparation of the hexafluorophosphate salt, neutralization of hexafluorophosphoric acid is carried out using an organic Lewis base. Organic hexafluorophosphate salt reacts with an alkaline hydroxide, selected from an alkali metal hydroxide (other than LiOH) and an alkaline earth metal hydroxide, in a non-aqueous suspending medium, to obtain an alkaline hexafluorophosphate salt in the form of a precipitate. To recover the alkaline hexafluorophosphate salt, the liquid phase is removed, a non-aqueous suspending medium, unreacted organic Lewis base and water. For the production of phosphorus pentafluoride, thermal decomposition of the alkaline hexafluorophosphate salt is carried out.
EFFECT: increase in the purity of the hexafluorophosphate salt and phosphorus pentafluoride is provided.
16 cl, 12 dwg, 1 tbl, 3 ex
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