Actinide(III)/Lanthanide(III) Separation Via Selective Aqueous Complexation of Actinides(III) using a Hydrophilic 2,6-Bis(1,2,4-Triazin-3-Yl)-Pyridine in Nitric Acid

Geist, Andreas; Müllich, Udo; Magnusson, Daniel; Kaden, Peter; Modolo, Giuseppe; Wilden, Andreas; Zevaco, Thomas A.

doi:10.1080/07366299.2012.671111

Cited by 140 publications

(155 citation statements)

References 27 publications

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“…Geist et al have synthesised recently a hydrophilic BTP, 2,6-bis(5,6-di(sulphophenyl)-1,2,4-triazin-3-yl)pyridine (SO 3 -Ph-BTP, Fig. 14) [59], and tested it for its ability of selectively suppressing the extraction of An(III) from nitric acid solutions [60,61].…”

Section: Innovative-sanexmentioning

confidence: 99%

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

et al. 2012

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Summary. The selective partitioning (P) of long-lived minor actinides from highly active waste solutions and their transmutation (T) to short-lived or stable isotopes by nuclear reactions will reduce the long-term hazard of the high-level waste and significantly shorten the time needed to ensure their safe confinement in a repository. The present paper summarizes the on-going research activities at Forschungszentrum Jülich (FZJ), Karlsruher Institut für Technologie (KIT) and Institute for Transuranium Elements (ITU) in the field of actinide partitioning using innovative solvent extraction processes. European research over the last few decades, i.e. in the NEWPART, PARTNEW and EUROPART programmes, has resulted in the development of multi-cycle processes for minor actinide partitioning. These multi-cycle processes are based on the co-separation of trivalent actinides and lanthanides (e.g. by the DIAMEX process), followed by the subsequent actinide(III)/lanthanide(III) group separation in the SANEX process. The current direction of research for the development of innovative processes within the recent European ACSEPT project is discussed additionally. This paper is focused on the development of flow-sheets for recovery of americium and curium from highly active waste solutions. The flow-sheets are verified by demonstration processes, in centrifugal contactors, using synthetic or genuine fuel solutions. The feasibility of the processes is also discussed.

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Section: Innovative-sanexmentioning

confidence: 99%

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

et al. 2012

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“…The lack of any corrosion enhancement in the presence of SO 3 -Ph-BTBP for both SS304L and SS316L is surprising considering the ligands known affi nity for actinide/lanthanide 3+ oxidation state species [8,10,13] and the previously reported ability of similar BTP derivatives to complex strongly with Fe(II) species [27]. This may in part be due to the requirement for a conformational change in SO 3 -Ph-BTBP from its preferred trans-conformation to the less favoured cis-conformation prior to metal binding [9,11,12], Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1. Relatively few studies have been published on the complexation properties of SO 3 -Ph-BTBP [8,10,13]. However, from what data is available on Am(III) and Eu(III) complexation in a TODGA system, SO 3 --Ph-BTBP appears to have a similar selectivity to SO 3 -Ph-BTP.…”

Section: Introductionmentioning

confidence: 94%

“…Originally used in its hydrophobic form, CyMe 4 --BTBP, in the SANEX process (an additional Ln(III) extraction step of PUREX raffi nates) [9,11], fundamental studies by Trumm et al [15] suggested that BTBP (and BTP) retains the selectivity in the aqueous phase, resulting in the synthesis through sulfonation [16] of Ph-BTBP by Geist et al [8,10,13], Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the ability of said ligands to complex with An(III) and Ln(III) species [13,14], the potential stripping via complexation of either Fe 3+ or Cr 3+ from the process steel and subsequent destabilization of the protective oxide fi lm is a concern.…”

Section: Introductionmentioning

confidence: 99%

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The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

Wilbraham

Boxall

2015

Nukleonika

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Abstract. SO 3 -Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the fi rst study of the effect of SO 3 -Ph-BTBP on the corrosion behavior of stainless steels. Specifi cally, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing fl ow sheets. SO 3 -Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO 3 -Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO 3 -Ph--BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe 3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO 3 -Ph-BTBP as a result of a requirement for a trans-to cis-conformational change before binding.

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Tetrahydrosalen Uranyl(VI) Complexes: Crystal Structures and Solution Binding Study

Zhao

Zhang

et al. 2018

Eur J Inorg Chem

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A pair of uranyl complexes incorporating tetrahydrosalen and N,N-dimethyltetrahydrosalen ligands are synthesized and studied. These new ligands, with saturated secondary and tertiary amines, exhibit higher chemostability than the prototype Schiff base (salen) structure, especially under acidic conditions. As shown by X-ray diffraction crystallography, the coordination geometry of uranium in these new complexes is a distorted pentagonal bipyramid. Interestingly, UO 2 ([H 4 ]salen), comprising the tetrahydrosalen ligand, forms a dimeric structure in the crystals, with two subunits held together by [a]

show abstract

Actinide(III)/Lanthanide(III) Separation Via Selective Aqueous Complexation of Actinides(III) using a Hydrophilic 2,6-Bis(1,2,4-Triazin-3-Yl)-Pyridine in Nitric Acid

Cited by 140 publications

References 27 publications

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

Tetrahydrosalen Uranyl(VI) Complexes: Crystal Structures and Solution Binding Study

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Actinide(III)/Lanthanide(III) Separation Via Selective Aqueous Complexation of Actinides(III) using a Hydrophilic 2,6-Bis(1,2,4-Triazin-3-Yl)-Pyridine in Nitric Acid

Cited by 140 publications

References 27 publications

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Tetrahydrosalen Uranyl(VI) Complexes: Crystal Structures and Solution Binding Study

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Product

Resources

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The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid