| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of easily producing an indium ion-containing aqueous solution in which, from an acid aqueous solution comprising indium ions and tin ions, the tin ions are substantially removed. SOLUTION: In the method of producing an indium ion-containing aqueous solution, an acid aqueous solution comprising indium ions and tin ions is subjected to electrolytic treatment by making electric current flow by the quantity to substantially remove the tin ions from the acid aqueous solution by converting the tin ions into metallic tin, thus metallic tin is deposited, and the deposited metallic tin is removed. In the production method, the acid aqueous solution comprising the indium ions and the tin ions can be obtained by dissolving a compound comprising indium, tin and oxygen in hydrochloric acid. COPYRIGHT: (C)2005,JPO&NCIPI
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