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Nonaqueous low-temperature nitration of uranium oxides in TBP

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Abstract

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.

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Authors and Affiliations

  1. All-Russian Research Institute of Chemical Technology, Moscow, Russia

    A. Yu. Kuznetsov, E. P. Buchikhin & V. V. Solov’eva

  2. Mendeleev Russian University of Chemical Engineering, Moscow, Russia

    A. M. Chekmarev

Authors
  1. A. Yu. Kuznetsov
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  2. E. P. Buchikhin
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  3. V. V. Solov’eva
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  4. A. M. Chekmarev
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Original Russian Text © A. Yu. Kuznetsov, E.P. Buchikhin, V. V. Solov’eva, A.M. Chekmarev, 2008, published in Radiokhimiya, 2008, Vol. 50, No. 5, pp. 403–405.

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Kuznetsov, A.Y., Buchikhin, E.P., Solov’eva, V.V. et al. Nonaqueous low-temperature nitration of uranium oxides in TBP. Radiochemistry 50, 466–469 (2008). https://doi.org/10.1134/S1066362208050056

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  • DOI: https://doi.org/10.1134/S1066362208050056

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