METHOD FOR PRODUCING NOBLE METAL ADSORBENT AND RECOVERY METHOD OF NOBLE METALS

摘要

To provide a method for producing a novel noble metal adsorbent that enables recovery of noble metals at a low cost/low environmental load and to provide a recovery method of noble metals using the noble metal adsorbent.SOLUTION: As a method for producing a noble metal adsorbent, the method for producing as a noble metal adsorbent an insoluble gel produced by crosslinking with addition of glutaraldehyde as a crosslinking agent in an equimolar amount to a proanthocyanidin oligomer having an average polymerization degree of 3 to 4 is provided. As a method for selectively recover other noble metals exclusive of platinum (Pt) from a solution having a plurality of noble metals mixed therein, the recovery method which comprises using as a noble metal adsorbent an insoluble gel produced by crosslinking with addition of glutaraldehyde as a crosslinking agent in an equimolar amount to a proanthocyanidin oligomer having an average polymerization degree of 3 to 4 and selectively adsorbing other noble metals exclusive of platinum (Pt) mixed in the solution on the noble metal adsorbent is provided.SELECTED DRAWING: Figure 1