| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe and simple method with a light environmental load for separating/recovering a platinum group element that is a recovery process of platinum group metals using a wet method and an ion exchange method and has an excellent rate of separation/recovery of each platinum group element.SOLUTION: A method for separating/recovering a platinum group element includes a leaching step for leaching a mixture of platinum group elements into a hydrochloric acid solution to prepare a leachate, a first separation/recovery step for separating/recovering palladium by bringing a palladium adsorbent into contact with the leachate, a second separation/recovery step for separating/recovering platinum by bringing a platinum adsorbent into contact with a leachate after the first separation/recovery obtained in the first separation/recovery step at a high velocity, the velocity at which rhodium being hardly adsorbed, and a third separation/recovery step for batchwise separating/recovering rhodium by bringing a rhodium adsorbent into contact with a leachate after the second separation/recovery obtained in the second separation/recovery step. The palladium adsorbent includes a porous resin and an extraction agent supported by the porous resin, while the platinum adsorbent and rhodium adsorbent are each a weak base ion exchange resin. |
