| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a treatment method in a solution purification step in a copper electrolysis process, which increases a concentrating rate of an electrolytic solution, increases Ni-collecting efficiency, and is efficient and inexpensive. <P>SOLUTION: The method for collecting Ni from the deacidified liquid in the purification step of a copper electrolytic solution comprises the steps of: removing Sb and Bi from the electrolytic solution with the use of a chelate resin having an amino-phosphate group; passing the solution having Sb and Bi already removed therefrom through a strongly-basic anion exchange resin and a chelate resin with a glucamine group in series to remove As, Sb, Bi and sulfuric acid by adsorption, and collecting the deacidified liquid; and concentrating the deacidified liquid in an existing concentration step to obtain a concentrated solution. The method can efficiently collect Ni sulfate by increasing a difference of solubility both in a submersible combustion method and in a freezing method. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
