METHOD FOR REFINING AQUEOUS NICKEL CHLORIDE SOLUTION

摘要

A method for refining an aqueous nickel chloride solution to efficientl y remove an impurity element, in particular zinc, which can form a complex with chlorine from the solution by a simple system at a low cost. More concretely, method for refining an aqueous nickel chloride solution containing zinc and one or more other impurity elements which can form a complex with chlorine, comprising a first step for oxidation/neutralization of the solution adjusted beforehand under given conditions with respect to Ni concentration, oxidation-reduction potential and pH to remove the impurity elements, and a second step for ion-exchanging the solution refined by the first step with an anion-exchange resin to remove zinc by adsorption.