Study of the extraction of uranium (VI) by bis-(di-n-butylphosphate) compounds including a polyheteroatomic chain from nitrate solutions
作者:Elisabeth Archelas、Gérard Buono、Bernard Waegell
DOI:10.1016/s0277-5387(00)81050-5
日期:1982.1
molecules coordinated to uranyl cation. Extraction stoichiometry is dependent upon extractant compound and its concentration in organic phase. For the compounds 1–3 , m = 1.5 when extractant concentration is higher than 0.1 M; m takes the different values 0.5, 1.0 and 1.5 when extractant concentration is lower than 0.1 M For the compound in which X is sulfur atom, m = 2.0 over all studied concentration range
摘要具有两个通过多杂原子链BuO)2 P(O)OCH 2(CH 2 XCH 2)n CH 2 OP(O)(OBu)2连接的磷酸二正丁酯基团的化合物1-4 ; 2:n = 1,X = 0; 3:n = 2,X = 0; 4:n = 1,X = S)分别通过氯二正丁基磷酸酯对乙二醇,二和三乙二醇的作用而制备。在相转移条件下的硫代二甘醇。研究了在甲苯稀释剂中用这些化合物从硝酸盐相中萃取铀(VI)的方法。化合物1-3的分配比比磷酸三正丁酯的分配比大。萃取研究表明,这些化合物的多加氧链参与了U(VI)络合。络合物的一般表达式假定为UO 2(NO 3)2 L m,其中L为萃取剂化合物,m为与铀酰阳离子配位的分子数。萃取化学计量取决于萃取剂化合物及其在有机相中的浓度。对于化合物1-3,当萃取剂浓度高于0.1 M时,m = 1.5;对于化合物1-3,则m = 1.5。当萃取剂浓度低于0.1 M时,m取0.5、1