VERFAHREN ZUR RUECKGEWINNUNG VON GALLIUM AUS SCHROTT.

摘要

Scrap containing gallium and arsenic is treated with chlorine gas to form a crude gallium and arsenic chloride mixture. Arsenic chloride and impurities having a lower boiling point than that of arsenic chloride are removed from the mixture by vaporization so that crude gallium chloride may be obtained. The crude gallium chloride is purified by distillation. The purified gallium chloride is electrolyzed to yield metallic gallium. If the scrap has a molar gallium/arsenic ratio exceeding l, arsenic chloride or metallic arsenic or both are added to the scrap before it is treated with chlorine gas.