| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method by which tin is efficiently removed without producing tin oxides and hydroxides to be made fine solid matters which become a problem when a copper alloy pickling waste liquid is reutilized, further, copper in a treatment liquid is efficiently recovered, and sulfuric acid after the treatment is reutilized. <P>SOLUTION: In the method of recovering a copper alloy pickling waste liquid containing tin ions and tin compounds, the waste liquid is subjected to pretreatment so as to be heated to≥40°C and to selectively be subjected to sedementation treatment, and is thereafter subjected to recovering treatment. <P>COPYRIGHT: (C)2004,JPO</p> |
