| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of reducing the quantity of a neutralizing agent to be used by efficiently removing impurity elements forming chlorine complexes of zinc, copper, iron, cobalt or the like contained in a nickel chloride aqueous solution with simple equipment at a low cost to decrease the removed quantity of copper, iron or cobalt in oxidation-neutralization. SOLUTION: The method of refining the nickel chloride aqueous solution includes a 1st process for removing, by oxidation-neutralization, at least one kind selected from cobalt, copper or iron from the nickel chloride aqueous solution containing the impurity elements forming the chlorine complexes of Zinc and others and a 2nd process for removing zinc by ion exchange using an anion exchange resin. The concentration of one of the impurity elements in the nickel chloride aqueous solution obtained in the 1st process is controlled as follows. That is, cobalt concentration=≤3 g/L, copper concentration=≤1 g/L or iron concentration=≤1 g/L. COPYRIGHT: (C)2005,JPO&NCIPI
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