(1. 昆明贵金属研究所， 昆明 650221;
2. 北京大学 分子与化学工程学院国家稀土材料化学重点实验室， 北京 100871)
摘 要: 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+·H2O·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。
关键字: 金; 表面活性剂; 溶剂萃取; 盐析效应
Au(CN)2- solvent extraction by CTMAB
（1. Kunming Institute of Precious Metals, Kunming 650221, P.R.China；
2. State Key Laboratory of Rare Earth Materials Chemistry and Applications,
College of Chemistry and Molecular Engineering,
Beijing University, Beijing 100871, P.R.China）
Abstract:The abnormal influence of salting-out agent on the Au(CN)2- solvent extraction by CTMAB was discussed. The results show that the addition of salting-out agent decreases the gold extraction, which means the action mechanism of salting-out agents is closely related with the existence state and structure of the extractive complex in the loading-organic phases. The addition of salting-out agent decreases the activity of H2O in the aqueous phases, harms to the formation of CTMA+•H2O•TBP. These results also bring some new ideas into the traditional theories of solvent extraction salting-out effect.
Key words: gold; surfactant; solvent extraction; salting-out effect
