| abstract |
This palladium extraction agent, which comprises an alkyl-sulfide-group-comprising disubstituted aromatic compound represented by general formula (I) as an active ingredient, can be used to selectively extract only palladium from a solution in which a mixture of platinum, rhodium, base metals, etc., is present, will not oxidize even after extended contact with acidic solutions, and can be used to extract palladium in a short length of time. (In the formula, R represents an optionally branched hydrocarbon group comprising 1–12 carbon atoms, an alicyclic hydrocarbon group comprising 5–7 carbon atoms, or an aromatic hydrocarbon group comprising 7 or 8 carbon atoms.) |