SORPTIVE LEACHING OF A MIXTURE OF ZINC, IRON(III), COBALT(II, III), AND NICKEL(II) OXIDES

The possibility of selective, sorptive leaching of zinc from a mixture of zinc, iron(III), cobalt(II, III), and nickel(II) oxides by applyin g the cation-exchanger KU-2-8 in the H-form is investigated. It is det ermined that cobalt(II, III) does not go into the solution during sorp tive leaching, whereas iron(III) is almost not leached when the pH of the solution is high (4-6). The selectivity coefficient of zinc compar ed to iron(III) reaches a value of 5000 during the course of the proce ss.