| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for recovering tin where, in a tin-containing basic solution comprising Sb as impurities, the Sb concentration can be sufficiently reduced in a short time, and tin can be efficiently recovered. <P>SOLUTION: To a tin-containing basic solution comprising antimony as impurities, a metal baser than antimony in an alkali region is added in a state where ions comprising sulfur having the oxidation number of -2 are present, it is gently stirred at ≥70°C, so as to precipitate antimony by substitution reaction, antimony is removed by filtering, and thereafter, tin is recovered by electrowinning using the obtained solution as an electrolytic solution. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
