PROCESSES FOR PRODUCING PHOSPHORUS TETRAFLUORIDE AND PHOSPHATE HEXAFLUORIDE

摘要

A process for producing phosphorus pentafluoride by separating/extracting phosphorus pentafluoride from a pentavalent-phosphorus compound or a solution thereof or from a composition obtained by reacting the pentavalent-phosphorus compound or solution thereof with hydrogen fluoride. Also provided is a process for producing a hexafluorophosphate in which the phosphorus pentafluoride obtained is used as a raw material to produce a high-purity hexafluorophosphate. The process for phosphorus pentafluoride production is characterized by bringing a carrier gas into contact with a pentavalent-phosphorus compound or a solution thereof or with a solution obtained by reacting the pentavalent-phosphorus compound or solution thereof with hydrogen fluoride to obtain a composition and dissolving the composition to thereby extract and separate phosphorus pentafluoride with the carrier gas.