双取代长链烷基酰胺的结构与萃取性能的研究Ⅱ．Ｎ， Ｎ-二丁基烷基酰胺萃取铀和钍

双取代长链烷基酰胺的结构与萃取性能的研究Ⅱ．Ｎ，Ｎ-二丁基烷基酰胺萃取铀和钍

摘要: 以磺化煤油为溶剂研究了Ｎ，Ｎ二丁基辛酰胺、Ｎ，Ｎ二丁基癸酰胺、Ｎ，Ｎ二丁基月桂酰胺从硝酸介质中萃取铀和钍。测定了萃取剂浓度、硝酸浓度对萃取分配比的影响，确定了萃合物组成。实验结果表明，酰胺羰基链长的变化对铀分配比影响不大；随着羰基链长的增加，酰胺萃取钍的能力下降。根据萃取剂和萃合物的红外光谱对上述结果进行了讨论。

Abstract: Extraction of uranium(Ⅵ) and thorium(Ⅳ) with N,N dibutyloctanamide,N,N dibutyldecanamide and N,N dibutyldodecanamide in sulfonated kerosene from nitric acid solutions is studied.The effect of concentrations of aqueous nitric acid and extractants on the extaction distribution ratios is conducted.The stoichiometry of extracted complex is established.The change in the length of carbonyl chain does not affect the extraction of uranium(Ⅵ) apparently,however,the extraction of thorium(Ⅳ) falls with the increase in the length of carbonyl chain.These results are discussed by the aid of the IR spectra of extractant and extracted species.