用于锕系元素提取分离的萃取剂——TiAP

对磷酸三异戊酯(TiAP)和磷酸三丁酯(TBP)萃取体系的物理性质、萃取能力、耐辐照等方面进行了比较,结果表明,TiAP作为萃取剂在物理性质、萃取Pu(Ⅳ)和Np(Ⅳ)的能力以及辐照稳定性能等方面明显好于TBP。提出TiAP是一种很好的并有可能用于锕系元素提取分离的萃取剂。

TiAP: An Extractant for Extraction and Separation Actinide Elements

Tri-isoamyl phosphate(TiAP or TAP) with tri-butyl phosphate(TBP) in physical characters,extraction ability and radiation-resist stability were compared.The results show that TiAP is a better extractant than TBP in physical properties,ability of extraction of Np(Ⅳ) and Pu(Ⅳ),and radiation-resist stability.It shows that radiation stability of TiAP is adequate for most of the process application,ability of extraction of Np(Ⅳ),Pu(Ⅳ),U(Ⅵ) and Np(Ⅵ) is good,and the extraction of fission product contaminants such as Zr,Nb,Ru,Cs is almost negligible even at very high nitric acid concentrations in the aqueous phase.TiAP may be an alternative extractant to TBP for extraction and separation of actinide elements,which is especially suitable for systems containing high-level radioactivity and/or high concentration plutonium.It is worthy of further exploration.