Solvent extraction of U(Ⅵ) by N,N-dimethyl-N',N'-dioctylsuccinylamide and N,N-dimethyl-N',N'-didecylsuccinylamide in cyclohexane  

作　　者：Yu Cui Xiao-Feng Yang Cheng Yang Ye-Xin Li Guo-Zhu Chen Guo-Xin Sun 

机构地区：[1]School of Chemistry and Chemical Engineering,University of Jinan

出　　处：《Nuclear Science and Techniques》2016年第3期68-73,共6页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.21077044 and 21171069)

摘　　要：The extraction of uranyl nitrate by novel extractants of N,N-dimethyl-N',N'-dioctylsuccinylamide(DMDOSA)and N,N-dimethyl-N',N'-didecylsuccinylamide(DMDDSA) from aqueous nitric/nitrate solutions was investigated.It was found both the concentration of HNO_3 and extractants had an effect on the U(Ⅵ) extraction distribution.The extraction mechanism was established,and stoichiometry of the main extracted species was confirmed to be UO_2(NO_3)_2·2DMDOSA and UO_2(NO_3)_2·2DMDDSA,respectively.Both of the extraction reactions are exothermic.FTIR spectral study of the U(Ⅵ) extracted species was also made.The extraction of uranyl nitrate by novel extractants of N,N-dimethyl-N＇,N＇-dioctylsuccinylamide（DMDOSA）and N,N-dimethyl-N＇,N＇-didecylsuccinylamide（DMDDSA） from aqueous nitric/nitrate solutions was investigated.It was found both the concentration of HNO3 and extractants had an effect on the U（Ⅵ） extraction distribution.The extraction mechanism was established,and stoichiometry of the main extracted species was confirmed to be UO2（NO3）2·2DMDOSA and UO2（NO3）2·2DMDDSA,respectively.Both of the extraction reactions are exothermic.FTIR spectral study of the U（Ⅵ） extracted species was also made.

关 键 词：溶剂萃取 二甲基 环己烷 FTIR光谱 硝酸铀酰 化学计量比 O3浓度 萃取反应 

分 类 号：TL24[核科学技术—核燃料循环与材料]