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Solvent Extraction of Copper Ion with Chelate Extractants Having Two Hydroxyoxime Moieties

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Abstract

Novel compounds having two hydroxyoxime moieties were prepared and used for copper extraction from an acidic sulfate solution. Logarithmic plots of the copper distribution ratio vs. pH and the extractant concentration showed that the copper extractions were established through the formation of 1:2 (Cu2+: extractant) complexes. At concentrations below 1 mM, however, the existence of the m: m (m>1) complexes were suggested by UV (molar ratio method) and ESR measurements. The half-extraction pHs of the extractants were in the range of 1.8 to 2.0 and were lower than that of LIX65N.

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Authors and Affiliations

  1. Department of Environmental Chemistry and Engineering, Faculty of Engineering, Oita University, Dannoharu, Oita, 870-11, Japan

    Naoyoshi Egashiha

  2. Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University, Hakozaki, Fukuoka, 812, Japan

    Makoto Takagi & Mizuo Maeda

Authors
  1. Naoyoshi Egashiha
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  2. Makoto Takagi
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  3. Mizuo Maeda
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Egashiha, N., Takagi, M. & Maeda, M. Solvent Extraction of Copper Ion with Chelate Extractants Having Two Hydroxyoxime Moieties. ANAL. SCI. 7, 907–911 (1991). https://doi.org/10.2116/analsci.7.907

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  • DOI: https://doi.org/10.2116/analsci.7.907

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