The extraction of Cu(II) by LIX 54-100 (ß-diketone) in Iberfluid (kerosene type diluent) from ammoniacal/ammonium sulphate solutions has been investigated. The analysis of metal distribution data suggested the formation of CuR2 species in the organic phase with formation constant log Kext= −6.15. The results obtained on Cu(II) distribution have been implemented in a solid supported liquid membrane system, using H2SO4 solutions (e.g. 0.9 mol/l) to strip the metal from the organic solution.
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