Extraction of copper-thiocyanate complex by tributylphosphate (TBP) and its application to copper determination in aluminum alloy.

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Other Title
  • TBP(トリ<I>n</I>-ブチルボスフェート)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
  • TBP トリ n-ブチルホスフェート ニ ヨル ドウ-チオシアン サンエン ノ チュウシュツ オヨビ アルミニウム ゴウキン チュウ ノ ドウ テイリョウ エ ノ オウヨウ
  • Solvent extraction in analytical chemistry. VI
  • 溶媒抽出法の工業分析への応用(第6報)

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Abstract

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.<BR>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.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 10 (13), 1340-1345, 1961

    The Japan Society for Analytical Chemistry

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