Solvent extraction of copper from chloride solutions with LIX860N-IC and LIX 84-IC
DOI:
https://doi.org/10.3989/revmetalm.2001.v37.i4.513Keywords:
Copper, Solvent extraction, Chloride solutions, Hydroxyoximes, LIX 860N-IC, LIX 84-IC,Abstract
In this work, the extraction of copper from chloride solutions with two hydroxyoximes: 5- nonylsalicylaldoxime (LIX 860N-IC) and 2-hydroxy-5-nonylacetophenona oxime (LIX 84-IC) is discussed. The results showed that an increase in the acidity and an increase in the total concentration of chloride ions in the aqueous phase decreased significantly the extraction of copper as well as the extraction of iron for both extractants. This effect of the chloride ions can be explained by the formation of a series of chloro complexes of Cu(II) and Fe(III) in the aqueous phase. The effect of initial pH and total chloride concentration on the extraction of chloride by the organic phase suggests that LIX 860N-IC, and to a lesser extent LIX 84-IC, extract small amounts of the cationic complex, CuCl+. An increase in the concentration of chloride ions also produced a small decrease in the rate of copper extraction with both hydroxyoximes.
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