硝酸介质中DCH_(18)C_6对Sr^(2+)的萃取行为研究  

Study on Extraction of Strontium by Dicyclohexyl- 18- crown- 6 from Nitric Acid Solution

作　　者：高晓雷[1,2] 高灿[1,2] 刘海宁[1] 叶秀深[1] 李权[1] 吴志坚[1] 

机构地区：[1]中国科学院青海盐湖研究所,盐湖资源与化学重点实验室,青海西宁810008 [2]中国科学院,北京100049

出　　处：《盐业与化工》2014年第6期16-19,共4页Jounral of Salt and Chemical Industry

基　　金：中国科学院知识创新工程重要方向项目(kzcx2-ew-qn309);国家自然科学基金(50972151;51002164);青海省自然科学基金(2012-Z-922Q)

摘　　要：文章研究了硝酸介质中二环己基-18-冠醚-6(DCH18C6)对锶的萃取行为。通过考察稀释剂、相比(O/A)、萃取剂浓度及硝酸浓度对萃取过程中分配比和萃取率的影响,得出了DCH18C6在硝酸介质中对Sr2+的萃取规律。实验结果表明,该萃取体系在硝酸介质中能够有效地萃取锶,在萃取相比为1∶4,DCH18C6的浓度为0.1 mol/L,硝酸浓度为1.0 mol/L时,一次萃取率高于90%,用去离子水反萃四次,反萃率可达100%。The extraction of strontium with dicyclohexyl- 18- crown- 6 from nitric acid solution was investigated and the influence of the ratios of the extraction phase（ O /A）,the concentration of DCH18C6,different diluents and the concentration of nitric acid was examined. The best ratios of the extraction phase（ O /A）,diluents and the concentration of nitric acid conditions were obtained. The results showed thant strontium can be efficiently extracted by DCH18C6dissolved in 1,1,2,2- tetrachloroethane from a nitric acid solution. The extraction percentage of Sr^2＋ was found to be higher than 90% when the O /A was 1 ∶ 4,the concentration of DCH18C6was 0. 1 mol /L and the concentration of HNO3was 1. 0 mol /L. The extracted Sr2 ＋can be easily stripped with deionized water. Nearly 100% recovery of Sr^2＋ was achieved by four times of such stripping.

关 键 词：锶 萃取 二环己基-18-冠醚-6 硝酸 

分 类 号：TQ23[化学工程—有机化工]