C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
53/166, 204/66.5
C25C 1/00 (2006.01) C01G 15/00 (2006.01) C01G 28/00 (2006.01) C22B 7/00 (2006.01) C22B 58/00 (2006.01) C25C 1/22 (2006.01)
Patent
CA 1272464
ABSTRACT OF THE DISCLOSURE 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 1, arsenic chloride or metallic arsenic or both are added to the scrap before it if treated with chlorine gas.
516955
Kirby Eades Gale Baker
Sumitomo Metal Industries Ltd.
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