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研究了HNO3洗涤法去除TRPO相中H2 C2 O4的条件。结果表明 ,用 5 5mol/LHNO32级洗涤TRPO流程中H2 C2 O4反萃Np、Pu段的TRPO相 ,可以完全去除H2 C2 O4,TRPO相不再出现混浊。再用 (NH4) 2 CO3溶液从TRPO相中反萃U(Ⅵ ) ,水相不再产生白色沉淀。确保TRPO提取锕系元素的萃取流程正常进行。
The conditions for the removal of H2 C2 O4 in TRPO phase by HNO3 washing were studied. The results show that H2O2 O4 can be completely removed by stripping the TRPO phase of Np and Pu with H2 C2 O4 in TRPO process with 5 5mol / L HNO3, while no turbidity appears again in TRPO phase. Then U (Ⅵ) was stripped from the TRPO phase with (NH4) 2 CO3 solution, and no white precipitate was formed in the aqueous phase. Make sure the extraction process of actinides extracted by TRPO is working normally.