Separation of nickel and zinc by means of ionites

Abstract

The method of separation of zinc and nickel with the help of ionites is based on the different strength of complex ions of these metals in aqueous solution. Thus, at a chlorine ion concentration of 1.5-2.0 g-ion/l, zinc forms complex anions, while nickel remains in the form of cations. The different charge sign of nickel and zinc ions in chloride solution can be used for separation of these metals by absorption of nickel cations by cationites or complex zinc anions by anionites.In this work both variants were investigated. Weakly acidic KB-4-P2 in Na-form and strongly acidic KU-2 in H-form served as cationites, strongly basic AB-17 in chloride form served as anionites.