Abstract
A method for quantitative extraction of zinc with potassium ethyl xanthate into carbon tetrachloride is described. The optimum conditions are: pH 5–6 and Zn(II) to reagent ~1:8 mole ratio. The effects of other ions on the extraction of Zn 2+ have been investigated, and its separation from As 3+, Pb 2+, Cu 2+ and Fe 3+is described. The possibility of repeated use of the solvent (still loaded with xanthate after the zinc has been stripped) for further extractions (after addition of a little extra xanthate) has been explored. Various stripping agents have been examined, and the optimum conditions found.
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