盐酸介质中N,N'-二甲基-N,N'-二辛基-3-氧戊二酰胺萃取Cu^(2+)的研究

Study on the Extraction of Cu^(2+) with N, N'-dimethyl-N, N'-dioctyl 3-oxadiglycolamide from Hydrochloric Acid

研究盐酸介质中N,N'-二甲基-N,N'-二辛基-3-氧戊二酰胺对Cu2+的萃取行为,考察了不同稀释剂、水相酸度、氯化钠浓度、萃取剂浓度和温度对萃取分配比的影响.结果表明:体系酸度、氯化钠浓度或萃取剂浓度任意一个增大,萃取分配比随之增大;温度升高时,萃取分配比下降,说明该萃取反应是放热反应.通过热力学研究,得到了萃合物的组成.

The extraction behavior of Cu^2＋ using N,N＇-dimethyl-N, N＇-dioctyl 3-oxadiglycolamide from hydrochloric acid was studied. The effect of different diluent, aqueous phase acidity, NaCl concentration, extractant concentration, and temperature on the extraction distribution of Cu^2＋ was investigated. The result shows that the distribution ratio increases with an increase in the acid concentration, NaCl concentration and （or） extractant concentration, but decreases with the increase in the temperature, which demonstrates that the extraction reaction is exothermic. By thermodynamic studies, the composition of the extracted complexes was obtained.