摘要
研究了N-(2-乙基)己基己内酰胺(EHCLA)-三甲苯从硝酸介质中萃取铀、钍。EHCLA对这两种元素的萃取规律类似于TBP。用斜率法求得铀、钍的溶剂化数均为2,硝酸为1。还就温度对于萃取的影响和铀、钍的反萃以及三相的形成进行了研究,计算了萃取平衡常数和铀、钍的△H值。初步探讨了萃取的机理。
The extraction of uranium (Ⅵ) , thorium ( Ⅳ) and nitric acid as a function of aqueous HNO3 concentration, extractant concentration and temperature is studied with N-(2-ethyl-hexyl) caprolactam. The extracted species and enthalpy of extraction reaction are evaluated . The third phase formation in extraction of U( Ⅵ)is also studied. In addition ,back extraction behavior of U(Ⅵ)and Th(Ⅳ)from organic phase is tested . The results obtained are compared with those obtained by using TBP at the same experimental conditions.
出处
《核技术》
CAS
CSCD
北大核心
1992年第10期610-616,共7页
Nuclear Techniques
基金
国家自然科学基金
关键词
EHCLA
铀
钍
萃取
核燃料后处理
N-( 2-ethylhexyl )caprolactam Uranium Thorium Extraction
