| Autor: |
Kuznetsov, A. Yu., Buchikhin, E. P., Solov'eva, V. V., Chekmarev, A. M. |
| Předmět: |
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| Zdroj: |
Radiochemistry; Sep2008, Vol. 50 Issue 5, p466-469, 4p, 6 Graphs |
| Abstrakt: |
Nonaqueous low-temperature nitration of UO2 and U3O8 in the system TBP-chlorinated dilu-ent-NO2 was studied. The oxides dissolve to form uranyl nitrate. The influence exerted on the dissolution efficiency by the concentration of the donor solvent in the TBP-tetrachloroethylene system and by additions of water was examined. These dependences pass through a maximum. The influence of temperature on nitration of U3O8 and UO2 was studied, and the activation energies were determined (48.0 and 31.2 kJ mol−1, respectively). The partial orders of the nonaqueous nitration reactions with respect to NO2 were determined for U3O8 and UO2: 1.0 and 1.4, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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