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Use of Carbamide Nitrate in the Hydrometallurgy of Uranium

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Abstract

The influence exerted by carbamide nitrate additive in the extractive refining of uranium on the capacity of the extractive agent (23% TBP in an organic diluent), completeness of uranium re-extraction from a saturated extractive agent, and residual concentration of uranium in the nitrate raffinate was examined. Nitrate-carbamide and nitrate solutions containing uranyl nitrate [UO2(NO3)2] obtained in the dissolution of concentrated uranium oxide (U3O8) were used in experiments. The re-extraction of uranium was performed with acidified water at pH 3. It was found that the capacities of the extractive agent for uranium are comparable for the nitrate-carbamide and nitrate solutions, which makes it possible to use carbamide nitrate as an agent for salting-out of uranyl nitrate. The residual concentration of uranium in the raffinate after a carbamide denitration does not exceed 13.6–14.1 mg/L. A solution of ammonium carbonate also provides a complete solid-phase re-extraction of uranium from the extractive agent saturated in the nitrate-carbamide solution. There is no accumulation of carbamide nitrate in the technological cycle at an acidity of the starting solution equal to 0.4–0.6 M. The stability temperature is calculated for the system under study. A process of hydrolysis of carbamide nitrate to ammonium nitrate at an elevated pressure is suggested. The resulting solution can be used, after an acidity correction, as a desorbing agent in the sorption refining of uranium in the technology of underground leaching of uranium.

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REFERENCES

  1. Molodkin, A.K., Ellert, G.V., Ivanova, O.M., and Skotnikova, G.A., Zh. Neorg. Khim., 1967, vol. 12, no. 4, p. 947.

    CAS  Google Scholar 

  2. Narayanan Kutty, T.R. and Vasudeva Murthy, A.R., Indian J. Chem., 1973, vol. 11, no. 3, p. 253.

    Google Scholar 

  3. Ostrovskii, Yu.V., Zabortsev, G.M., Shpak, A.A., Yakobchuk, S.P., Aleksandrov, A.B., Khlytin, A.L., and Gusev, A.A., Radiochemistry, 2004, vol. 46, no. 3, p. 252. https://doi.org/10.1023/B:RACH.0000031682.39026.a3

    Article  CAS  Google Scholar 

  4. Ostrovskii, Yu.V. and Zabortsev, G.M., Vestnik UGTU-UPI, Radiokhimiya, Trudy II Ural’skoi Konf., Yekaterinburg, 2004.

  5. Ostrovskii, Yu.V., Zabortsev, G.M., Shpak, A.A., Aleksandrov, A.B., Saifutdinov, S. Yu., Drobyaz, A.I., and Khlytin, A.I., RU Patent no. 2253161 (Publ. 27.05.2005), Byull. Izobret., 2005. no. 15.

  6. Nurakhmetov, N.N., Itogi Nauki Tekhniki, Ser.: Fiz. Khim., 1989, no. 4, p. 64.

  7. Zhil’ber, Sh., Antuan, F., and Sil'vi, D., RU Patent no. 2179761, (Publ. 20.02.2002), Byull. Izobret., 2002, no. 5.

  8. Kvekenbush, A. B. RU Patent no. 2 061 671 (Publ. 10.06.1996), Byul. Izobret., 1996, no. 16.

  9. Vasil’ev, Yu.B., Eventov, V.L., Gromyko, V.A., and Gadadymov, V.B., Itogi Nauki Tekhniki, Ser.: Elektrokhim., 1990, vol. 31, p. 55.

    Google Scholar 

  10. Khimicheskaya entsiklopediya v 5 tomakh (Chemical Encyclopedia in 5 vols.), vol. 3: Medi sul’fidy-polimernye krasiteli (Copper Sulfides–Polymeric Dyes), Knunyants, I.L., Zefirov,N.S., Kulov, N.N., Zolotov, Yu.A., Kabanov, V.A., Kalechits, I.V., Kolotyrkin, Ya.M., Koptyug, V.A., Kutepov, A.M., Malyusov, V.A., Nefedov, O.M., Tal'roze, V.L., Spirin, A.S., Stepanov, N. F. Sholle, V.D., Yagodin, G.A., Eds., Moscow: Sov. Entsiklopediya, 1992.

  11. Ostrovskii, Yu.V., Zabortsev, G.M., Aleksandro,v, A.B., Drobyaz, A.I., Saifutdinov, S.Yu., and Khlytin, A.L., RU Patent no. 2 295 168 (Publ. 10.03.2007), Byull. Izobret., 2007, no. 7.

  12. Ostrovskii, Yu.V., Zabortsev, G.M., Chapaev, I.G., Aleksandrov, A.B., Saifutdinov, S. Yu., and Khlytin, A.L., Radiochemistry, 2009, vol. 51, no. 1, p. 30. https://doi.org/10.1134/S1066362209010093

    Article  CAS  Google Scholar 

  13. Emel’yanov, V.S. and Evstyukhin, A.I., Metallurgiya yadernogo goryuchego (Metallurgy of Nuclear Fuel), Moscow: Atomizdat, 1968.

    Google Scholar 

  14. Shevchenko, V.B. and Sudarikov, B.N., Tekhnologiya urana (Technology of Uranium), Moscow: Gos. Izd. Lit. Obl. Atomn. Nauki Tekhn., 1961.

    Google Scholar 

  15. Goloshchapov, R.G., Dedov, N.V., Dorda, F.L., and Skotnova, V.N., Abstracts of Papers, 2nd Russ. Conf. on Radiochemistry, Dimitrovgrad: NIIAR, 1997.

  16. Ostrovskii, Yu.V., Zabortsev, G.M., Zherin, I.I., Ostrovskii, D.Yu., and Egorov, N.B., Al’tern. Energ. Ekol., 2017, nos. 13–15 (225–227), p. 101.

    Google Scholar 

  17. Sannikov, V.N. and Lutsenko, N.I., Gorn. Zh., 2017, no. 8, p. 23.

    Article  Google Scholar 

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Authors and Affiliations

  1. EIDOS Research and Production Center, 630075, Novosibirsk, Russia

    Yu. V. Ostrovskii, G. M. Zabortsev & D. Yu. Ostrovskii

  2. Novosibirsk State Technical University, 630073, Novosibirsk, Russia

    Yu. V. Ostrovskii

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  1. Yu. V. Ostrovskii
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  2. G. M. Zabortsev
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  3. D. Yu. Ostrovskii
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Correspondence to Yu. V. Ostrovskii.

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Ostrovskii, Y.V., Zabortsev, G.M. & Ostrovskii, D.Y. Use of Carbamide Nitrate in the Hydrometallurgy of Uranium. Radiochemistry 62, 624–628 (2020). https://doi.org/10.1134/S1066362220050094

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