链状聚醚用作萃取剂的研究——Ⅲ.Am(Ⅲ)与Cm(Ⅲ)的三甘酰双(二苯胺)萃取及萃取色层分离

STUDIES ON LINEAR POLYETHERS AS EXTRACTANTS Ⅲ. EXTRACTION AND EXTRACTION CHROMATOGRAPHIC SEPARATION OF Am(Ⅲ) AND Cm(Ⅲ) BY N, N, N', N'-TETRAPHENYL-3, 6-DIOXAOCTANE DIAMIDE

摘要: 本文研究了三甘酰双(二苯胺)的硝基苯溶液从苦味酸溶液中萃取Am(Ⅲ)和Cm(Ⅲ)的性能,并与Ce,Nd和Eu的萃取进行了比较。萃合物组成可表示为ML_2Pic_3;分配比随温度上升而下降;在所有情况下,Am的分配比均大于Cm,平均分离因数为3.0;水相中加入DTPA后,分离因数可达5.6。将此体系移植到萃取色层柱上,实现了Am(Ⅲ)与Cm(Ⅲ)的良好分离。

Abstract: The solvent extraction of Am(Ⅲ) and Cm(Ⅲ) from picric acid solution by nitrobenzene solution of N, N, N', N'-tetraphenyl-3,6-diox'aoctane diamide was investigated and compared with the extraction of cerium, neodymium and europium. The composition of extraction complexes may be represented as ML2Pic,. The distribution ratio falls down with an increase in temperature. In all the cases studied, the distribution ratio of Am(Ⅲ) is higher than Cm(Ⅲ). The average value of separation factor is 3 and increases to 5.6 when DTPA is added into the aqueous phase. The system has been applied to extractlon chromatography with good separation between Am (Ⅲ) and Cm(Ⅲ),