| 摘要 |
Separating Au or Pt group metals from aq. solution. The metal is absorbed on a selective ion exchange resin which forms a chelate with the noble metal. The resin is subsequently washed with dil. HCl to remove base metal traces. The noble metal is recovered by either ignition of the resin or elution with acid and a complexing agent. The resin contains recurring units (I): X = S, O, -NH-, or (-CH2-)1-4, Y = H, alkyl, alkenyl or aryl, Z = Y or NHZ = NH+3Cl-. - This process is easier and cheaper than conventional precipitation, cyanidization, amalgamation and electrolysis processes.
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