TBP(トリn-ブチルホスフェート)による銅-チオシアン酸塩の抽出およびアルミニウム合金中の銅定量への応用

概要

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The effect of concentration of thiocyanate and pH on the TBP extraction of copper-thiocyanate complex was investigated, and it was found that above 99.9% extraction was effectuated in the concentration of 0.21.2M of thiocyanate and with pH17. Also, the percentage recoveries by the ammonia reextraction of the solventextracted copper indicated that thiocyanate concentration and pH had marked influences on the copper recovery. Namely, an increase in the thicyanate concentration or a lowering of pH was followed by a considerable decrease in the per cent recovery. However, using of TBP-benzine (1:1) as a solvent caused an increase in the reextraction rate and a recovery rate above 99% in the ammonia reextraction was obtained with 0.20.8M thiocyanate under the pH 15. The method was applied for separation of copper in aluminum alloy followed by the determination of copper by thiosulfate titration. Good result was obtained for 14% copper.
社団法人日本分析化学会の論文