| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for recovering indium and tin, by which high purity indium and tin oxide are recovered easily from agglomerates containing indium oxide and tin oxide. <P>SOLUTION: The method for recovering high purity indium and high purity tin includes: a leaching step in which indium oxide and tin oxide-containing material is subjected to leaching with hydrochloric acid; a step in which the resultant leaching solution is adjusted to have a pH of ≥14 by adding an alkali, then indium is deposited in the form of a hydroxide and recovered, and tin is, after being subjected to neutralization with an alkali, roughly separated as a liquid; and a step in which the indium hydroxide is subjected to leaching with hydrochloric acid and thereafter, the leaching solution is purified to remove tin by substitution of indium plates. <P>COPYRIGHT: (C)2012,JPO&INPIT |
