HEDPA反萃TRPO/煤油和TRPOTBP/煤油中UO_2~(2+)、Pu(Ⅳ)、Am~(3+)和TcO_4~-

BACK-EXTRACTION OF UO_2~(2+) ,Pu(Ⅳ),Am~(3+) and TcO_4~- WITH HEDPA FROM TRPO/KEROSENE AND TRPO-TBP/KEROSENE

摘要: 研究了用两种不同来源的 2 羟乙基 1 ,1 二膦酸 (HEDPA)配制的不同硝酸浓度、不同HEDPA浓度的溶液对 30 %TRPO(混合三烷基氧膦 ) /煤油和 2 0 %TRPO 2 0 %TBP(磷酸三丁酯 ) /煤油中UO2 2 + 、Pu(Ⅳ )、Am3+ 和TcO4- 的反萃。提出了用HEDPA为反萃剂的TRPO流程。

Abstract: The back extraction of UO 2 2+ ,Pu(Ⅳ),Am 3+ and TcO 4 - with 2 hydroxyethyl 1,1 diphosphonic acid (HEDPA) solution from 30 % TRPO(mixed trialkyl phosphine oxide)/ kerosene and 20 %TRPO 20 %TBP(tributyl phosphate)/kerosene systems is studied. Two kinds of HEDPA with different purity are compared. The effects of nitric acid concentration and HEDPA concentration on the back extraction are demonstrated. Based on the experimental results , a TRPO process using HEDPA as the back extractant is proposed.