Phosphonium based ionic liquid with a novel anion, 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate (HfAc) was synthesized and characterized by elemental analysis, ³¹P and ¹³C NMR. The functionalized ionic liquid showed interesting solvent extraction behavior for U(VI), Pu(IV), Am(III) and Eu(III) from the nitric acid medium when used in conjunction with toluene as diluent. Kinetics of extraction was found to be fast with equilibrium being attained within 15 min. The acid dependency of the distribution ratios for the radionuclides showed two different mechanisms at pH medium as well as at higher nitric acid concentration showing dual solvent behavior. The solvent was found to be reusable for at least six cycles when regenerated using hexafluoroacetylacetone prior to each cycle of extraction. Stripping of the loaded elements from the solvent was found to be feasible using a complex mixture of Guanidine carbonate and EDTA. The solvent showed significant distribution ratio of Eu(III) even in presence of higher concentration of Eu i.e. 30 mM. .

合成了具有新型阴离子1,1,1,5,5,5-六氟-2,4-戊二酮酸酯（HfAc）的based基离子液体，并通过元素分析，³¹ P和^13进行了表征1 H NMR。与甲苯作为稀释剂一起使用时，功能化离子液体对硝酸中的U（VI），Pu（IV），Am（III）和Eu（III）表现出有趣的溶剂萃取性能。发现萃取动力学很快，并且在15分钟内达到平衡。放射性核素的分配比对酸的依赖性在pH介质以及较高的硝酸浓度下表现出两种不同的机理，表现出双重溶剂行为。当在每个萃取循环之前使用六氟乙酰丙酮再生溶剂时，发现该溶剂可重复使用至少六个循环。发现使用碳酸胍和EDTA的复杂混合物从溶剂中汽提负载的元素是可行的。即使在较高浓度的Eu（即30 mM）的存在下，溶剂也显示出显着的Eu（III）分配比。。