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有色金属废料中的元素金在有氧化剂存在的情况下(如Fe_2(SO_4)_3或H_2O_2)易于被酸性硫脲溶液浸出.浸出时间主要取决于氧化剂的浓度和金复盖膜的厚度.金以Au[SC(NH_2)_2]_2~+络合物的形式进入溶液,用阳离子交换树脂几乎可以完全得到回收,溶液中最后残留的金不大于6μm.脱金后的溶液可以再用于浸出.将饱和的载金阳离子交换树脂(载金量达30～60克/升)烧掉,以回收其中的金.对于用阳离子交换树脂吸附金和铁的研究表明,金的吸附纯粹是通过离子交换机理发生并且金络合物的健力明显地大于铁化合物的键力.
Elemental gold in non-ferrous metal scrap is readily leached by acidic thiourea solution in the presence of an oxidizing agent such as Fe 2 (SO 4) 3 or H 2 O 2. The leaching time depends mainly on the concentration of oxidizing agent and the thickness of the gold-clad film. The Au [SC (NH_2) _2] _2 ~ + complex enters the solution and is almost completely recovered with the cation exchange resin, with the final remaining gold in the solution not exceeding 6 μm. The gold-stripped solution can be reused for leaching. The saturation of the gold-loaded cation exchange resin (gold loading of 30 to 60 g / l) to burn out to recover the gold for cation exchange resin adsorption of gold and iron research shows that gold adsorption purely through the ion exchange Management occurs and the gold complex is significantly stronger than the bond strength of iron compounds.