【摘要】 研究了双-丁二酰胺萃取剂的合成及其对硝酸介质中Th(Ⅳ)离子的萃取行为。从简单的原料出发,合成了新型的多官能团的双-丁二酰胺萃取剂,并以其为萃取剂、二甲苯为稀释剂,考察了水相中硝酸浓度、萃取剂浓度、盐析剂浓度等因素对Th(Ⅳ)离子分配比的影响。利用斜率分析方法提出了双-丁二酰胺萃取剂萃取Th(Ⅳ)的萃取机理。利用该萃取剂对比萃取了钍及铕离子,得到了高达166.6的分离因子。更多还原

【Abstract】 Three extractants containing bis-succinamide(BisSCA) skeleton have been synthesized and identified by NMR and HRMS. The extraction behavior of Th(Ⅳ) using the present extractants was evaluated in nitric acid solution. The dependence of the extraction distribution ratios on the concentrations of aqueous nitric acid, extractant and salting-out agent was investigated. Slope analysis suggests the formation of major mono-solvated species between Th(Ⅳ) and BisSCA. The comparative extraction of Th(Ⅳ) and Eu(Ⅲ) demonstrates that the excellent separation factor is obtained in 166.6.更多还原