Transient- and steady-state concentration profiles in a DIAMEX-like countercurrent process for An(III) + Ln(III) separation

A. Facchini, L. Amato, G. Modolo, R. Nannicini, C. Madic, P. Baron

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A new version of the DIAMEX (DIAMide EXtraction) process is reported to separate trivalent Am,Cm (An) and lanthanides (Ln) from a PUREX (Plutonium Uranium Refining by EXtraction by tributyl phosphate) process raffinate at a high aqueous/extractant flow-rate ratio while taking care of prevent third- phase formation. The process has been modeled by a computer program and tested on a 16-stage mixer/settler battery to perform extraction, scrubbing, and stripping to obtain an Am (representing the mixture of Am + Cm) decontamination factor (feed/raffinate) higher than 103and a Mo + Zr fission product content in the product lower than 1 wt% of that of Am. Transient and steady-state concentration profiles of the solutes have been calculated and experimentally determined, and good agreement was generally observed.
Original languageEnglish
Pages (from-to)1055 - 1068
Number of pages14
JournalSeparation Science and Technology
Issue number7
Publication statusPublished - 2000
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

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