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- W2054338419 abstract "Solutions of Cu(II) and Fe(II) establish the redox equilibrium Cu(II) + Fe(II)⇌K Cu(I) + Fe(III) which is displaced to the right by addition of either Cl− or acetonitrile (AN). Log K varies from −10.5 in water to about −2.5 in 4 M NaCl or AN, allowing iron to be removed selectively from copper (II) solutions either by solvent extraction with Versatic acid or by precipitation as goethite or j jarosite. To establish the required conditions Eh-pH diagrams have been developed for the CuH2OCl and CuH2OANSO42-systems at 25°C and 90°C. It is demonstrated that the catalytic effect of Cu(II) on the oxidation of Fe(II) to Fe(III) by O2 is dependent on the concentration of Cl− or AN and on the position of this redox equilibrium. Applications to removing iron from hydrometallurgical solutions are discussed and tested." @default.
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- W2054338419 date "1983-01-01" @default.
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- W2054338419 title "Removal of iron and formation of copper(i) from solutions containing iron(ii) and copper(ii) by addition of chloride ion or acetonitrile" @default.
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- W2054338419 doi "https://doi.org/10.1016/0304-386x(83)90026-9" @default.
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