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伯胺N_(1923)是金的良好萃取剂,在不同稀释剂中,N_(1923)对金的萃取能力的顺序为:环已烷>正已烷>二氯甲烷>苯>四氯化碳>三氯甲烷,其萃取情况与铂相近。萃取率随氢离子浓度的增大而降低,但随氯离子的浓度的增大而升高,这可能是氯化钠的盐析作用的缘故。用恒摩法和斜率法测定被萃物中胺与金属的比例,结果都是1:1,但反萃时有一部分金不能被反萃下来,说明除了离子对缔合萃取体系之外,同时还有内配位络合萃取体系,其被萃物对前者是RNH_3AuCl_4,对后者为[RNH_2AuCl_3]。
The primary amine N_ (1923) is a good extractant of gold. The extraction ability of gold N_ (1923) in different diluents is as follows: cyclohexane> n-hexane> dichloromethane> benzene> carbon tetrachloride > Chloroform, its extraction is similar to platinum. The extraction rate decreased with the increase of hydrogen ion concentration, but increased with the increase of chloride ion concentration, which may be due to the salting-out effect of sodium chloride. Using constant friction method and slope method to determine the ratio of amine to metal in the extracted material, the results are 1: 1, but some of the gold can not be back-extracted stripping down, indicating that in addition to the ion-pair extraction system, There are coordination complex extraction system, the extract of the former is RNH_3AuCl_4, the latter [RNH_2AuCl_3].