Direct Selective Extraction of Actinides (III) from PUREX Raffinate using a Mixture of CyMe<sub>4</sub>BTBP and TODGA as 1-cycle SANEX Solvent Part III: Demonstration of a Laboratory-Scale Counter-Current Centrifugal Contactor Process

Wilden, Andreas; Modolo, Giuseppe; Schreinemachers, Christian; Sadowski, Fabian; Lange, Steve; Sypuła, Michał; Magnusson, Daniel; Geist, Andreas; Lewis, Frank W.; Harwood, Laurence M.; Hudson, Michael J.

doi:10.1080/07366299.2013.775890

Cited by 70 publications

(50 citation statements)

References 38 publications

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“…7,[21][22][23][24][25] Also, hydrophilic bis-triazines were synthesized as masking agents for some metal ions that could interfere with An(III) separation. 6,[27][28][29][30][31] Consequently, a few hydrophilic BTBPs have been synthesized and tested. 6,[27][28][29][30][31] Consequently, a few hydrophilic BTBPs have been synthesized and tested.…”

Section: Introductionmentioning

confidence: 99%

TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO₃-Ph-BTBP

et al. 2015

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The complexation of Cm(iii) and Eu(iii) with a water soluble BTBP (sodium 3,3',3'',3'''-([2,2'-bipyridine]-6,6'-diylbis(1,2,4-triazine-3,5,6-triyl))tetrabenzenesulfonate, SO3-Ph-BTBP) is studied using time resolved laser fluorescence spectroscopy. For the complexation of Cm(iii) the influence of the medium (10(-3) M HClO4→ 0.5 M HNO3) is investigated in detail revealing important impacts of the applied medium (pH, ionic strength, anions) on the speciation and conditional stability constants. SO3-Ph-BTBP forms 1 : 2 complexes with Cm(iii) and Eu(iii). The conditional stability constants of [Cm(SO3-Ph-BTBP)2](5-) and [Eu(SO3-Ph-BTBP)2](5-) in 0.5 M HNO3 are determined to be log β02 = 7.3 ± 0.3 and log β02 = 5.4 ± 0.5, respectively. The difference of 1.9 orders of magnitude is in line with hydrophobic BT(B)P type ligands and shows that the selectivity is not affected by tuning the hydrophilicity using SO3-Ph-side chains.

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Section: Introductionmentioning

confidence: 99%

TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO₃-Ph-BTBP

et al. 2015

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“…Details of the equipment, procedure, and analytics are described elsewhere. [25][26][27] Distribution ratios were calculated as the radioactivity or concentration of the metal ion in the organic phase divided by the respective radioactivity or concentration in the aqueous phase.…”

Section: Procedures and Analytical Methods Of The Process Demonstrationmentioning

confidence: 99%

“…for An(III)/Ln(III) co-extraction, [25] but comparable to processes for the selective separation of An(III) from Ln(III). [26,29] Due to the limitation of the available number of 16 centrifugal contactors, it was not possible to run the complete process in a single run. Therefore, the extraction + scrubbing part was tested first and enough loaded solvent was collected and stored overnight to be used on the consecutive day for the stripping part.…”

Section: Procedures and Analytical Methods Of The Process Demonstrationmentioning

confidence: 99%

An Advanced TALSPEAK Concept for Separating Minor Actinides. Part 2. Flowsheet Test with Actinide-spiked Simulant

Wilden

Lumetta

Sadowski

et al. 2017

Solvent Extraction and Ion Exchange

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An Advanced TALSPEAK counter-current flowsheet test was demonstrated using a simulated feed spiked with radionuclides in annular centrifugal contactors. A solvent comprising 2ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP] or PC88A) in n-dodecane was used to extract trivalent lanthanides away from the trivalent actinides Am 3+ and Cm 3+ , which were preferentially complexed in a citrate buffered aqueous phase with N-(2hydroxyethyl)ethylenediamine-N,N',N'-triacetic acid (HEDTA). In a 24-stages demonstration test the trivalent actinides were efficiently separated from the trivalent lanthanides with decontamination factors >1,000, demonstrating the excellent performance of the chemical system. Clean actinide and lanthanide product fractions and spent solvent with very low contaminations were obtained. The results of the process test are presented and discussed.

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“…However, the substantial developments made under successive EU projects have brought us significantly closer to this goal; see the 1-cycle-SANEX process described in Wilden et al (2013). This requires a highly selective extracting agent, which currently does not exist.…”

Section: Trivalent Actinide Separation: Challenges Keymentioning

confidence: 99%