Solvent extraction of metal ions with mixed ligands—VI: Extraction of In(III) and Eu(III) with mixtures of thenoyltrifluoroacetone (TTA) and β-isopropyltropolone (IPT)

摘要: Abstract Solvent extraction of In(III) and Eu(III) has been studied at 25°C in perchlorate media with mixtures thenoyltrifluoroacetone (TTA = HA) β-isopropyltropolone (IPT HB) chloroform. The distribution into chloroform was explained by the InAaB3−a (0 ≤ a 3) BbHa+b−3 (type B), but addition 1M tributylphosphate (TBP L) changes species to EuAaB3−aL2 complexes C). following equilibrium constants were calculated for types A C: K a,3−a [MA B −3a ] org [H + 3 /[M 3+ ][HA] [HB] 3−a it concluded that stabilities mixed complexes, MA2B MAB2, are almost same as those statistically (Table 1). Constants equilibria type only when [HA]org kept 0·1 M where main considered be adducts between EuA3 HB. β n [EuA H org/[EuA These seem indicate IPT undissociated form, HB, is rather strong donor chelate.