Extraction studies of base metals (Mn, Cu, Co and Ni) using the extractant 2-ethylhexyl 2-ethylhexyl phosphonic acid, PC 88A

摘要: Abstract The extraction characteristics of the base metals Mn, Cu, Co and Ni have been studied using extractant 2-ethylhexyl phosphonic acid (PC 88A). order these has established as Mn>Cu>Co>Ni when loading metal in organic phase is low. On high Cu>Mn>Co>Ni. separation factors β(Co–Ni), β(Cu–Co) β(Mn–Co) determined a function better extracted pair. β(Co–Ni) found to increase with Cu Co–Ni Cu–Co pairs respectively while decreases Mn. orders effect on explained basis following equilibrium reactions: M2++2(HL)2o ⇌ K 1 M(HL2)2o+2H+; M2++(HL)2o 2 ML2o+2H+; ML2o+(HL)2o 3 M(HL2)2o where M represents (Cu, Ni, or Mn), (HL)2 dimer PC 88A, o indicates K1, K2 K3 are constants reactions.