COBALT EXTRACTION SOLUTION, COBALT SOLUTION, AND COBALT COLLECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a cobalt extraction solution capable of extracting cobalt safely at lower cost than cost in a conventional one.SOLUTION: The cobalt extraction solution comprises: an ionic liquid including a quarternary ammonium group; and an organic solvent existing in a state that being mixed with the ionic liquid, and having 60 or more of a kauri-butanol value.