| 摘要 |
PROBLEM TO BE SOLVED: To provide a noble metal ion desorbent and a noble metal recovering method which can efficiently desorb noble metal ions adsorbed by an adsorbent and can simply recover highly pure noble metal by reductive treatment of the desorption liquid.SOLUTION: An adsorbent having noble metal ions adsorbed is contacted with a solution containing a sulfide compound represented by the general formula (1) to desorb the noble metal ions in the solution and, thereafter, the obtained solution containing the noble metal ions is subjected to reduction treatment to recover a noble metal. (In the formula (1), R represents a methyl group, an ethyl group, a vinyl group, a linear, branched, or cyclic hydrocarbon group having 3 to 8 carbon atoms, an aromatic hydrocarbon group having 6 to 14 carbon atoms, a carboxymethyl group, a carbamoylmethyl group, a 4-carboxyl-3-thiabutyl group, or a 4-carbamoyl-3-thiabutyl group; and X represents a hydroxyl group or a primary amino group.) |
