| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing impurity elements for selectively removing magnesium from a solution containing nickel, and a production method for producing high-purity nickel sulfate using the method for removing impurity elements.SOLUTION: A production method of high purity nickel sulfate from a solution containing nickel is provided which includes a production process. In the production process,the solution containing nickel in the production process is subjected to an impurity elements removing process comprising: a hydroxylation process for adding an alkali of a hydroxide to the solution containing nickel in the production process, thereby forming hydroxide slurry; a carbonation process for adding an alkali carbonate to the hydroxide slurry, thereby forming a carbonate slurry and recovering a nickel component from the solution; a solid-liquid separation process of the obtained slurry; and a neutralization process for neutralizing a reacted solution obtained in the solid-liquid separation, thereby recovering impurity elements contained in a solution containing nickel in the production process. |
