络合反萃分离铀、镎的串级实验研究

A STUDY ON THE CASCADE EXPERIMENTS OF COUNTCURRENT COMPLEXING REEXTRACTION FOR SEPARATING NEPTUNIUM FROM URANIUM

用DTPA配位反萃镎实验进行了分离铀镎的串级实验研究。实验结果表明，在所选定的实验条件下，铀中镎的去污因子都大于10。铀的回收率由于补萃液TBP酸度和补萃级数不同而不同。在三级补萃、补萃液酸度为0.6 mol/L时，铀的回收率可达98.3 %。

The cascade experiments of complexing reextraction experiments for separating Np from U by coordination stripping neptunium with DTPA have been carried out. The results showed that the separation factors were more than 10 in all selected experiment al conditions. The recovery of U was different for different conditions of acidity of TBP supplement extraction liquid and number of stages. The recovery of U was 98.3 % in the condition of three supplement extraction stages and 0.6 mol/L HNO3 in TBP supplement extraction liquid.