COBALT EXTRACTANT AND COBALT EXTRACTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a cobalt extractant that enables selective extraction of cobalt from an acidic solution containing manganese at a high concentration, and to provide a method for cobalt extraction with the use of the cobalt extractant.SOLUTION: The cobalt extractant in this invention contains an amine-based extractant and an oxime-based extractant. The amine-based extractant is preferably a primary amine-based extractant, and the primary amine-based extractant preferably contains tertiary butyl amine and/or octyl amine. The cobalt extractant in this invention is suitable for an acidic solution containing manganese and cobalt. More preferably, the pH of the acidic solution should be adjusted to a range of 4.0-6.0 prior to the solvent extraction with the cobalt extractant in this invention.