摘要
研究了以TBP-煤油为萃取剂,从可燃毒性燃料Gd2O3-UO2的HNO3浸出液中萃取分离钆和铀,考察了铀质量浓度、HNO3浓度、相比、有机相中TBP体积分数、温度对铀、钆萃取率及铀、钆分离的影响。试验结果表明:钆萃合物以Gd(NO3)3.3TBP形式为主;在铀质量浓度80～100g/L、HNO3浓度4mol/L、相比Vo/Va=1.5/1、有机相中TBP体积分数40%、室温最佳条件下,体系具有较大铀、钆分离系数和铀分配系数;工艺稳定,易于实现。
Using tri-n-butylphosphate （TBP） as extractant, kerosene as diluent,separation of uranium （U） and gadolinium （Gd3＋） in Gd2O3-UO2 fuel; tri-n-butylphosphate （TBP）; solvent extraction; uranium ; gadolinium ; separation fuel＇s nitric acid leaching solution has been studied. The effects of U concentration and nitric acid concentration in leaching solution, phase ratio, TBP percentage in organic phase and temperature on separation of U and Gda＋ have been examinated. The results shown that Gd（NO3）3 3TBP was dominant complex contained Gd3＋. The conditions of U concentration of 80--100 g/L, nitric acid concentration of 4 mol/L, phase ratio of 1. 5 ： 1, TBP percentage of 40% in organic phase and room temperature were beneficial to separate of U and Gd from nitric acid media. The process was convenient and stable, meanwhile, it also had great separation coefficient of U and Gd3＋.
出处
《湿法冶金》
CAS
北大核心
2012年第3期170-174,共5页
Hydrometallurgy of China
关键词
Gd2O3-UO2燃料
TBP
溶剂萃取
铀
钆
分离
Gd2O3-UO2 fuel
tri-n-butylphosphate （TBP）
solvent extraction
uranium
gadolinium
separation
