トリオクチルアミン抽出法によるガリウム（ＩＩＩ），インジウム（ＩＩＩ）およびアルミニウム（ＩＩＩ）の分離

Abstract

Separation among g allium(III), indium(III)and aluminium(III) by the extraction with trioctylamine(TOA) from an aqueous oxthlates solution containing chloride ions or sulfate ions has been studied. Indium(III)is separated into an organic phase from alurninium(III) in an aqueous oxalate solution and from gallium(III)by the addition of sodium chloride to an aqueous oxalate solution with TOA-xylene extraction. For the separation of gallium(III) from gallium(III)-aluminium(III), the addition of sulfate to an aqueous oxalate solution has been found to be more effeptive. However, aluminium(III) can not be extracted selectively into the organic phase leaving gallium(III) or indium(III)in the aqueous phase. Moreover, the dependence of the separation factor on TOA concentration has been investigated. It was observed that the suitable TOA concentration for these investigated system depends on the distribution ratio of more extractable metal species.