SCANDIUM CHLORIDE AND SCANDIUM CHLORIDE PRODUCTION METHOD

摘要

Provided is a scandium chloride production method that effectively separates an Al-Sc alloy into aluminum and scandium. The present invention includes: a heating step in which an alloy that comprises scandium and aluminum is heated to 300-700 °C under a chlorine gas atmosphere; and a scandium chloride recovery step in which scandium chloride is recovered from a solid phase after the heating step. The method includes a hydrogen chloride generation step in which aluminum chloride that is obtained in the heating step is brought into contact with hydrogen gas and hydrogen chloride is generated and a chlorine gas generation step in which hydrogen chloride is subjected to electrolysis in order to generate chlorine gas. The chlorine gas that is used in the heating step preferably comprises the chlorine gas that is obtained in the chlorine gas generation step. In addition, the scandium chloride production method preferably includes a scandium oxide recovery step in which scandium chloride is dissolved in order to obtain a scandium solution, oxalic acid is subsequently added to the scandium solution in order to obtain scandium oxalate, the scandium oxalate is oxidized, and scandium oxide is recovered.