Synergic extraction of nickel/II/ by 2-thenoyltrifluoroacetone and tribenzylamine in chloroform from perchlorate media

Synergic extraction of Ni/II/ at pH 1 to 10 was studied using a mixture of 2-thenoyltrifluoroacetone /HTTA/ and tribenzylamine /TBA/ in chloroform. The synergist TBA enhances the extraction of Ni/II/ by an order of 5 from pH 3 to 5 having ionic strength 0.1M /H⁺, ClO ₄ ^– /. The synergic adduct was found to be Ni/TTA/₂.2TBA. The equilibrium constants K_2,0 and K_2,2 and stability constant ₂,2 have been ascertained radiometrically. The influence of various cations and anions on the extraction of Ni/II/ has been examined under optimal conditions. Back extraction of the adduct species in different acids of varying concentrations has been studied.