Dissolution Extraction of Uranium Oxides and Cerium Oxide with TBP-HNO3 Complex in Supercritical CO2
Copyright policy )Dissolution Extraction of Uranium Oxides and Cerium Oxide with TBP-HNO3 Complex in Supercritical CO2
AbstractDissolution extraction of uranium oxides, CeO2 and (U, Ce)O2 solid solution with TBP-HNO3 complex in supercritical CO2 (SC-CO2) was investigated. It is difficult to dissolve and extract directly UO2 pellets and CeO2 with TBP-HNO3 complex in SC-CO2. After UO2 pellets spontaneously turns into U3O8 powders under O2 flow and 600°C, the extraction efficiency can reach more than 98%. For dissolution extraction of (U, Ce)O2 solid solution with TBP-HNO3 complex in SC-CO2 under 60 and 20MPa, the extraction efficiency of U and Ce is 98.61% and 98.1% respectively.
- China Institute of Atomic Energy China (People's Republic of)
- Tsinghua University China (People's Republic of)
Chemistry(all), TBP-HNO3 complex, Chemical Engineering(all), Cerium oxide, Supercritical CO2, Dissolution extraction, Uranium oxide
Chemistry(all), TBP-HNO3 complex, Chemical Engineering(all), Cerium oxide, Supercritical CO2, Dissolution extraction, Uranium oxide
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