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Extraction of uranium from simulated highly active feed in a micromixer-settler with 30% TBP and 36% TiAP solvents

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Abstract

Kinetics of U(VI) extraction, in centrifugal flow-field under PUREX conditions, is reported to be quite fast with a time constant of about 2–5 s. To test the limits of extraction under micro-mixing conditions, experiments were conducted for U(VI) extraction from simulated highly-active feed with 30% TBP/n-dodecane (PUREX solvent) and 36% TiAP/n-dodecane (alternate PUREX solvent) solutions in a micromixer-settler at demanding residence times of typically 0.25 s. Although employed residence times for mixing were fractions of time constants, reported in the literature, a quantitative extraction (and back extraction) was observed as indicated by excellent recoveries of U(VI) in the experiments.

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Authors and Affiliations

  1. Reprocessing Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    Shekhar Kumar, Bijendra Kumar, Pranay Kumar Sinha, M. Sampath & D. Sivakumar

  2. Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    U. Kamachi Mudali

Authors
  1. Shekhar Kumar
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  2. Bijendra Kumar
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  3. Pranay Kumar Sinha
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  4. M. Sampath
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  5. D. Sivakumar
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  6. U. Kamachi Mudali
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Correspondence to Shekhar Kumar.

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Kumar, S., Kumar, B., Sinha, P.K. et al. Extraction of uranium from simulated highly active feed in a micromixer-settler with 30% TBP and 36% TiAP solvents. J Radioanal Nucl Chem 311, 2111–2116 (2017). https://doi.org/10.1007/s10967-016-5134-5

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  • DOI: https://doi.org/10.1007/s10967-016-5134-5

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