An Investigation into the Extraction of Americium(III), Lanthanides and D‐Block Metals by 6,6′‐Bis‐(5,6‐dipentyl‐[1,2,4]triazin‐3‐yl)‐[2,2′]bipyridinyl (C<sub>5</sub>‐BTBP)

Foreman, Mark; Hudson, Michael J.; Geist, Andreas; Madic, C.; Weigl, Michael

doi:10.1080/07366290500230735

Cited by 98 publications

(75 citation statements)

References 15 publications

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“…Of these, hydrophobic bis(triazinyl)pyridines (BTP) [6] and bis(triazinyl)bipyridines (BTBP) [7][8][9] are the most promising candidates. However, none of them fulfil all criteria for application in an industrial process, hence requiring optimisation.…”

Section: Introductionmentioning

confidence: 99%

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

et al. 2010

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Section: Introductionmentioning

confidence: 99%

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

et al. 2010

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“…One interpretation of this correlation is that the lipophilic ion pair It is also apparent that the distribution ratio increases with increasing [HNO 3 ] and this trend is also observed with CyMe 4 -BTBP 3 [40] and the other BTBPs. [28][29][30][31][32][33][34][35][36][37][38] The maximum D value observed was 0.46 from 4 M HNO 3 . and the highest separation factor observed was 22 at 2 M HNO 3 .…”

Section: Resultsmentioning

confidence: 99%

“…[28][29][30][31][32][33][34][35][36][37][38] These ligands showed lower binding affinities towards americium(III) which allowed stripping to occur using either dilute nitric acid or glycolic acid. However, the 6,6'-bis(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2'-bipyridines (Cn-BTBPs, n = 1-5) were subjected to both acidic hydrolysis and radiolytic degradation by removal of their labile benzylic hydrogen atoms by free-radical species.…”

Section: Introductionmentioning

confidence: 99%

The Separation of Americium(III) from Europium(III) by Two New 6,6'-Bistriazinyl-2,2'-Bipyridines in Different Diluents

Harwood

Lewis

Hudson

et al. 2011

Solvent Extraction and Ion Exchange

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The synthesis and extraction of americium(III) and europium(III) from aqueous nitric acid solutions by the new BTBP ligands 6,6'-bis (5,5,7,7-tetramethyl-5,7-dihydrofuro[3,4-e]-1,2,4-triazin-3-yl)-2,2'-bipyridine (Cy 5 -O-Me 4 -BTBP) and 6,6'-bis (5,5,7,7-tetramethyl-5,7-dihydrothieno[3,4-e]-1,2,4-triazin-3-yl)-2,2'-bipyridine (Cy 5 -S-Me 4 -BTBP) is described. The affinity for Am(III) and the selectivity for Am(III) over Eu(III) of Cy 5 -S-Me 4 -BTBP were generally higher than for Cy 5 -O-Me 4 -BTBP. For both ligands, the extraction of Am(III) and Eu(III) from 3 M HNO 3 into 3 mM organic solutions varied with the diluent used. The highest distribution ratios and separation factors observed were in cyclohexanone and 2-methylcyclohexanone, respectively. For Cy 5 -S-Me 4 -BTBP, there is a strong correlation between the distribution ratio for Am(III) and the permittivity of the diluent used. With 1-octanol as the diluent, low distribution ratios (D(Am) < 1) were observed for Cy 5 -S-Me 4 -BTBP although this ligand extracts Am(III) selectively (SF Am/Eu = 16-46 from 1-4 M HNO 3 ). For Cy 5 -S-Me 4 -BTBP, Am(III) is extracted as the disolvate. The distribution ratios for Am(III), and the separation factors for Am(III) over Eu(III) are both significantly higher for CyMe 4 -BTBP than they are for Cy 5 -O-Me 4 -BTBP and Cy 5 -S-Me 4 -BTBP in cyclohexanone. Changing the diluent from cyclohexanone to 2-methylcyclohexanone leads to a decrease in D(Am) but an increase in SF Am/Eu for Cy 5 -S-Me 4 -BTBP.

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“…During the years, different extractant molecules and diluents have been used but for a long period of time various bis-triazine bipyridine (BTBP) molecules have been used as one of the extractants. BTBP molecules act as tetradentate ligands for metal ions, and many of them have a high selectivity of trivalent actinide extraction over trivalent lanthanides [14,15]. This is in general a diffi cult separation due to the chemical similarities between the trivalent actinides and the lanthanides.…”

Section: Grouped Actinide Extractionmentioning

confidence: 99%

“…Two BTBP type-ligands developed and synthesized to separate trivalent actinides from the fi ssion products, mainly from lanthanides, are 6,6-bis [14,15,25].…”

Section: Btbp Ligandsmentioning

confidence: 99%

Development of the Chalmers Grouped Actinide Extraction Process

et al. 2015

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Abstract. Several solvents for Grouped ActiNide EXtraction (GANEX) processes have been investigated at Chalmers University of Technology in recent years. Four different GANEX solvents; cyclo-GANEX (CyMe 4 --BTBP, 30 vol.% tri-butyl phosphate (TBP) and cyclohexanone), DEHBA-GANEX (CyMe 4 -BTBP, 20 vol.% N,N-di-2(ethylhexyl) butyramide (DEHBA) and cyclohexanone), hexanol-GANEX (CyMe 4 -BTBP, 30 vol.% TBP and hexanol) and FS-13-GANEX (CyMe 4 -BTBP, 30 vol.% TBP and phenyl trifl uoromethyl sulfone (FS-13)) have been studied and the results are discussed and compared in this work. The cyclohexanone based solvents show fast and high extraction of the actinides but a somewhat poor diluent stability in contact with the acidic aqueous phase. FS-13-GANEX display high separation factors between the actinides and lanthanides and a good radiolytic and hydrolytic stability. However, the distribution ratios of the actinides are lower, compared to the cyclohexanone based solvents. The hexanol-GANEX is a cheap solvent system using a rather stable diluent but the actinide extraction is, however, comparatively low.

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An Investigation into the Extraction of Americium(III), Lanthanides and D‐Block Metals by 6,6′‐Bis‐(5,6‐dipentyl‐[1,2,4]triazin‐3‐yl)‐[2,2′]bipyridinyl (C₅‐BTBP)

Cited by 98 publications

References 15 publications

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

The Separation of Americium(III) from Europium(III) by Two New 6,6'-Bistriazinyl-2,2'-Bipyridines in Different Diluents

Development of the Chalmers Grouped Actinide Extraction Process

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An Investigation into the Extraction of Americium(III), Lanthanides and D‐Block Metals by 6,6′‐Bis‐(5,6‐dipentyl‐[1,2,4]triazin‐3‐yl)‐[2,2′]bipyridinyl (C5‐BTBP)

Cited by 98 publications

References 15 publications

A TRLFS Study on the Complexation of CmIII and EuIII with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

A TRLFS Study on the Complexation of CmIII and EuIII with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

The Separation of Americium(III) from Europium(III) by Two New 6,6'-Bistriazinyl-2,2'-Bipyridines in Different Diluents

Development of the Chalmers Grouped Actinide Extraction Process

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Product

Resources

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An Investigation into the Extraction of Americium(III), Lanthanides and D‐Block Metals by 6,6′‐Bis‐(5,6‐dipentyl‐[1,2,4]triazin‐3‐yl)‐[2,2′]bipyridinyl (C₅‐BTBP)

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

A TRLFS Study on the Complexation of Cm^III and Eu^III with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture