N,N-二(1-甲基-庚基)乙酰胺萃取U(Ⅵ)和Th(Ⅳ)的研究  

STUDIES OF N,N-Di(1-METHYLHEPTY)ACETAMIDE ON EXTRACTION OF U(Ⅵ) AND Th(Ⅳ)

作　　者：金永东[1] 伍维蓉[1] 陈文浚[1] 

机构地区：[1]四川大学化学学院,四川成都610064

出　　处：《核化学与放射化学》2001年第1期13-17,22,共6页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金资助项目 !(2 99710 2 1)

摘　　要：以N ,N 二 (1 甲基 庚基 )乙酰胺 (DMHAA)为萃取剂 ,煤油作稀释剂 ,研究了水相硝酸浓度、盐析剂浓度、萃取剂浓度对U(Ⅵ )和Th(Ⅳ )萃取分配比的影响 ,并对其萃取机理进行了初步探讨。研究结果表明 ,DMHAA可以有效地从硝酸溶液中萃取UO2 +2 和Th(Ⅳ )Using keronese as diluent, U(Ⅵ) and Th(Ⅳ) can be extracted effectively by N,N di(1 methylheptyl)acetamide(DMHAA) from nitric acid solutions. The effects of the concentration of the nitric acid, salting out agents in aqueous phase and the extractant in organic phase on distribution ratios are examined. Under the same conditions, the distribution ratio of U(Ⅵ) is higher than that of Th(Ⅳ). The extraction mechanism are discussed.

关 键 词：N N-二(1-甲基-庚基)乙酰胺 萃取 铀(Ⅵ) 二(Ⅳ) 萃取剂 核燃料后处理 分离 

分 类 号：TL241.14[核科学技术—核燃料循环与材料]