HNO3-H2C2O4体系中Np和Pu的分离研究

摘要

研究了30％TBP-煤油在不同的硝酸-草酸混合溶液中对Np,Pu各价态的萃取分配，在HNO3-H2C2O4体系中，通过加入HNO3抑制草酸的电离，从而基本上消除草酸对30％TBP-煤油萃取Np,Pu的影响。根据所得数据研究了30％TBP-煤油萃取分离Np,Pu的工艺流程，并给出了各工艺参数。%The separation of Np,Pu has been studied in mixed H2C2O4-HNO3-30%TBP-kerosene. In condition of high acidity,the dissociation of H2C2O4 is inhibited,and the influence of H2C2O4 upon Np,Pu extraction ability by 30% TBP-kerosene as extractant has been eliminated in certain degree. According to the difference of HNO3 and H2C2O4 acidity, Np,Pu extraction contribution ratios of 30% TBP-kerosene are given, on the basis of it,one technological process of separation of Np,Pu with extraction of 30% TBP-kerosene and each technological parameter are recommended.