Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Solvent Extraction of Copper Ion with Chelate Extractants Having Two Hydroxyoxime Moieties
Naoyoshi EGASHIRAMakoto TAKAGIMizuo MAEDA
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1991 Volume 7 Issue 6 Pages 907-911

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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 1mM, 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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