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研究了阳离子表面活性剂萃取剂惰性稀释剂Au(CN) -2 体系萃金过程中盐析效应的规律。结果表明盐析剂的加入反而降低了金的萃取率。这说明盐析剂的作用机制与萃合物在负载有机相中的存在状态及结构密切相关。盐析剂的加入降低了水相中水分子的活度 ,不利于生成有机相中以水分子为桥的CTMA+ ·H2 O·TBP缔合大阳离子萃合物。对传统的溶剂萃取盐析效应提出了一些新的观点。
The effect of salting-out on the Au (CN) -2 system was studied during the process of extracting gold with the cationic surfactant extractant inert diluent. The results show that the addition of salting agent on the contrary reduced the gold extraction rate. This indicates that the salting-out agent’s mechanism of action is closely related to the existence state and structure of the extractant in the loaded organic phase. The addition of salting-out agent reduces the activity of water molecules in the aqueous phase, which is not conducive to the formation of CTMA + · H 2 O · TBP association macrocyclic complexes with water molecules as bridges in the organic phase. The traditional solvent extraction salting out effect put forward some new ideas.