【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 )更多还原

【Abstract】 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.更多还原