N,N,N',N'-四丁基-3-氧-戊二酰胺的水解和辐解稳定性研究

Study on the Hydrolytic and Radiolytic Stabilities of N,N,N',N'-tetrabutyl-3-oxa-pentanediamide

摘要: N,N,N',N' 四丁基 3 氧戊二酰胺(TBOPDA)对锕系元素具有良好的萃取性能,为了考察TBOPDA稳定性,研究了温度、酸度和吸收剂量对TBOPDA萃取性能的影响。研究结果表明,该萃取剂在水溶液中具有较高的稳定性,当酸度为1mol/L,温度达到50℃时,铀的萃取性能没有变化;当酸度提高到5mol/L时,50℃条件下,铀的萃取分配比下降约37%。TBOPDA具有较好的辐解稳定性,当纯萃取剂的吸收剂量达到1MGy时,萃取分配比有明显下降;稀释剂的加入会使萃取剂的辐解稳定性下降。

Abstract: N,N,N',N'-tetrabutyl-3-oxa-pentanediamide(TBOPDA) presents excellent extraction abilities for actinides elements. The effects of hydrolysis and radiation on extraction behavior of U(Ⅵ) with TBOPDA have been investigated. It indicates that TBOPDA has better hydrolysis stability. At 50 ℃,when the acidity is 1 mol/L HNO_3, the effects of hydrolysis on distribution ratio are unchanged, when the acidity is 5 mol/L, the changes of distribution ratio are about 37%. At the same time,it also has high radiolysis stability. When absorbed dose reached 1 MGy,D(U) declined remarkably. The addition of diluents resulted in a decline of radiolytic stability.