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Regeneration of Spent TBP-Diluent Solvent by Steam Distillation

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Radiochemistry Aims and scope

Abstract

Regeneration of irradiated and actual spent solvent (30% TBP in a hydrocarbon diluent) by overheated steam distillation was studied in batch experiments. The hydrodynamic and extraction-backwash parameters of thus regenerated solvent are practically the same as those of the fresh solvent. The bottoms comprise 3-7% of the initial volume and consist essentially of TBP. Large-scale rig trials of the single- and two-step continuous processes of solvent distillation are performed. Single-step distillation with overheated steam in a vacuum or with saturated water vapor at atmospheric pressure provides transfer into the distillate of the whole amount of the solvent, permitting the use of any diluent. The two-step process allows separation of the solvent into the TBP and diluent fractions and refining of each of them in the case when the diluent boiling point is below that of TBP by 50-70°.

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Authors and Affiliations

  1. Research and Production Association, Khlopin Radium Institute, St. Petersburg, Russia

    B. Ya. Zilberman, M. N. Makarychev-Mikhailov, V. F. Saprykin & L. B. Shpunt

  2. Sverdlovsk Institute of Chemical Engineering (SverdNIIKhimMash), Yekaterinburg, Russia

    S. V. Sakulin, Yu. N. Dulepov & V. V. Glushko

  3. Siberian Chemical Combine, Seversk, Tomsk oblast, Russia

    E. N. Semenov, N. A. Mikhailova, V. G. Balakhonov & M. E. Romanov

  4. Russian Academy of Sciences, Frumkin Institute of Electrochemistry, Moscow, Russia

    G. F. Egorov & O. P. Afanas'ev

  5. State Scientific Center of the Russian Federation, Bochvar Research Institute of Inorganic Materials, Moscow, Russia

    V. I. Volk

Authors
  1. B. Ya. Zilberman
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  2. M. N. Makarychev-Mikhailov
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  3. V. F. Saprykin
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  4. L. B. Shpunt
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  5. S. V. Sakulin
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  6. Yu. N. Dulepov
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  7. V. V. Glushko
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  8. E. N. Semenov
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  9. N. A. Mikhailova
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  10. V. G. Balakhonov
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  11. M. E. Romanov
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  12. G. F. Egorov
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  13. O. P. Afanas'ev
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  14. V. I. Volk
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Zilberman, B.Y., Makarychev-Mikhailov, M.N., Saprykin, V.F. et al. Regeneration of Spent TBP-Diluent Solvent by Steam Distillation. Radiochemistry 44, 274–281 (2002). https://doi.org/10.1023/A:1020358807780

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  • DOI: https://doi.org/10.1023/A:1020358807780

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