环烷酸—仲辛醇—二苯亚砜协萃Pr^(3+)、Nd^(3+)、Sm^(3+)、Gd^(3+)的研究

Investigation of the Regularity of Synergic Extraction of Pr^(3+), Nd^(3+), Sm^(3+), Gd^(3+) by Naphthenic Acid-Isooctylalcohol-Diphenyl Sulfoxide Mixture in Kerosene

用环烷酸—仲辛醇—二苯亚砜煤油溶液,对高氯酸底液中的Pr^(3+)、Nd^(3+)、Sm^(3+)、Gd^(3+)进行萃取。实验发现存在协萃效应。调节上述混合体系的组成及试液的pH值,在某一特定条件下可使Pr^(3+)、Nd^(3+)及Sm^(3+)、Gd^(3+)这两对离子既有适当大小的D值又有相对较大的分离系数。本文还对该三元体系的协萃机理作了初步探讨。

The synergic extraction regularity of Pr^(3+), Nd^(3+), Sm^(3+) Gd^(3+) from HClO_4, solution by naphthenic acid-iso-octylalcohol-diphenyl sulfoxide mixture in kerosene was studied. Regulating the composition of the organic phase and the pH of the lanthanide solution to a particular value the distribution ratio of the lanthanide ions and the separation factor β_(Pr^(3+)/Nd^(3+)) and β_(Sm^(3+)/Gd^(3+)) may attain to a reasonable value for separation process. The mechanism of synergic extraction was preliminarily studied.