摘要
用单级萃取试验研究了水相料液中ＨＮＯ３浓度和２－羟基乙基肼浓度对３０％ＴＢＰ－煤油相从水相中萃取Ｎｐ行为的影响，以及反萃液中ＨＮＯ３浓度和２－羟基乙基肼浓度对从含Ｎｐ的３０％ＴＢＰ－煤油相中还原反萃Ｎｐ的效率的影响。试验结果表明：提高水相料液中２－羟基乙基肼浓度和降低ＨＮＯ３浓度有利于抑制Ｎｐ的萃取，提高反萃液中２－羟基乙基肼浓度和降低ＨＮＯ３浓度有利于改善Ｎｐ的反萃取。在２－羟基乙基肼还原Ｎｐ（Ⅵ）过程中，３ｈ内几乎无Ｎｐ（Ⅳ）生成。当水相料液中有一定量Ｆｅ３＋存在时，有少量的Ｎｐ（Ⅳ）生成。在Ｐｕｒｅｘ流程中可望采用２－羟基乙基肼作为Ｎｐ（Ⅵ）的选择性还原剂进行Ｕ－Ｎｐ的分离。
The effects of concentration of HNO 3,HOC 2H 4N 2H 3 on extraction percentage of Np by 30 % TBP kerosene from HNO 3 medium and the effects of concentration of HNO 3, HOC 2H 4N 2H 3 in stripping solution on stripping percentage of Np from 30 %TBP kerosene are studied. The results show that increasing concentration of HOC 2H 4N 2H 3 and decreasing concentration of HNO 3 are favorable to restrain of Np and to accelerate stripping of Np. Based on the above results, it can be concluded that 2 hydroxyethylhydrazine is a promising selective reductant of Np(Ⅵ) in Purex process.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1999年第1期8-11,共4页
Atomic Energy Science and Technology
基金
核工业基金
