HNO_3洗涤法去除TRPO相中的H_2C_2O_4

REMOVAL OF H_2C_2O_4 FORM TRPO PHASE WITH HNO_3 WASHING METHOD

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 removal conditions of H 2C 2O 4 from TRPO phase with HNO 3 washing are studied. When TRPO phase is washed after Np and Pu stripping using 5.5 mol/L HNO 3 through 2 stages, all H 2C 2O 4 in TRPO phase is removed, The haze in TRPO phase doesnt occur. Then uranium in TRPO phase is stripped using (NH 4) 2CO 3 solution, the white precipitate doesnt produce in aqueous solution. TRPO process for removal of actinide elements can be operated normally.