In the molten salt and acid chloride and oxides of these compd. treatment method

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PROBLEM TO BE SOLVED : To provide a chloridation processing method of carrying out chloridation processing without leaving new products by reaction with a reducer in molten salt like conventional chloridation processing on components in molten salt.SOLUTION : A reducer composed of tungsten metal or a reducer composed of tungsten acid chloride or tungsten chloride is supplied into the molten salt to be processed, and reaction gas composed of gaseous chlorine or gaseous hydrogen chloride or mixed gas thereof is supplied into the molten salt. Acid chloride and oxide of actinide elements, transition metal elements or rare earth elements contained in the molten salt, and compound ions thereof are subjected to chloridation processing to obtain chloride and chloride ions.