METHOD FOR PRODUCING FLUORIDE SALTS, AND FLUORIDE SALTS, AND METHOD FOR PRODUCING SILICON USING THE FLUORIDE SALTS

摘要

PROBLEM TO BE SOLVED: To provide a method for producing fluoride salts capable of effectively removing impurities such as boron from fluoride salts such as NaF including the impurities such as the boron and obtaining the fluoride salts such as the NaF at an excellent yield.;SOLUTION: A method for producing fluoride salts including a step for preparing a container filled with fluoride salts containing impurities and a step for heating the fluoride salts containing the impurities at a melting point of the fluoride salts or higher and to make the same a vaporized substance is characterized by discharging the impurities of the vaporized substance outside of the container as gas and collecting the fluoride salts by condensing the same.;COPYRIGHT: (C)2014,JPO&INPIT