磷酸酯是目前核燃料工艺中应用最广泛的萃取剂,但这类磷化合物的辐射及化学稳定性均不高,疏水性亦不大,在萃取过程中试剂有损耗,而且它们的辐解和水解产物对萃取剂的纯化系数有影响,并造成萃取系统中相分离的困难。近年来在寻找新的磷型萃取剂中,膦酸酯是一个颇受人注意的类型。磷酸酯比磷酸酯多一种C—P键键型,烃基与磷原子直接相接后使磷酰基氧原子电荷密度增加,烷基膦酸酯及芳基膦酸酯均具有较高的路易斯碱性,因此 Phosphate ester is the most widely used extractant in the current nuclear fuel technology. However, the radiation and chemical stability of these phosphorus compounds are not high, hydrophobicity is not large, the reagents in the extraction process loss, and their radiolysis and hydrolysis The product has an influence on the purification factor of the extractant and causes difficulties in the phase separation in the extraction system. In recent years in the search for new phosphorus extractant, phosphonate is a well-known type. The phosphate ester is more C-P bond type than the phosphate ester. The alkyl and aryl phosphonates have higher Lewis bases So, so