Task-specific ionic liquid with coordinating anion for heavy metal ion extraction: Cation exchange versus ion-pair extraction

Messadi, Ahmed; Mohamadou, Aminou; Boudesocque, Stéphanie; Dupont, Laurent; Guillon, Emmanuel

doi:10.1016/j.seppur.2013.01.015

Cited by 75 publications

(45 citation statements)

References 43 publications

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“…Messadi et al [82] observe a very similar effect when they extract Cu 2+ to tributyl(2-ethoxy-2-oxoethyl)ammonium dicyanamide (BuGBOEt DCA). As in the present study, no ligand is necessary to solubilize the copper in the IL phase; in the case of Messadi and co-workers, the DCA coordinates the copper and solubilizes it in the IL phase.…”

Section: àmentioning

confidence: 88%

Copper extraction using protic ionic liquids: Evidence of the Hofmeister effect

Janssen

Macı́as-Ruvalcaba

Aguilar-Martı́nez

et al. 2016

Separation and Purification Technology

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Section: àmentioning

confidence: 88%

Copper extraction using protic ionic liquids: Evidence of the Hofmeister effect

Janssen

Macı́as-Ruvalcaba

Aguilar-Martı́nez

et al. 2016

Separation and Purification Technology

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“…[13][14][15][16][17][18] However, they are expensive solvents and before any industrial applications can be envisioned, it is necessary to evaluate the exact contribution of RTILs compared with the "conventional" extraction systems. To do so, measurement of the extraction efficiency is just the first step.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Mechanism of Extraction of Uranium (VI) from Nitric Acid Solution into an Ionic Liquid by using Tri‐n‐butyl phosphate

et al. 2015

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We present new results on the liquid-liquid extraction of uranium (VI) from a nitric acid aqueous phase into a tri-n-butyl phosphate/1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (TBP/[C4 mim][Tf2 N]) phase. The individual solubilities of the ionic-liquid ions in the upper part of the biphasic system are measured over the whole acidic range and as a function of the TBP concentration. New insights into the extraction mechanism are obtained through the in situ characterization of the extracted uranyl complexes by coupling UV/Vis and extended X-ray absorption fine structure (EXAFS) spectroscopy. We propose a chemical model to explain uranium (VI) extraction that describes the data through a fit of the uranyl distribution ratio DU . In this model, at low acid concentrations uranium (VI) is extracted as the cationic complex [UO2 (TBP)2 ](2+) , by an exchange with one proton and one C4 mim(+) . At high acid concentrations, the extraction proceeds through a cationic exchange between [UO2 (NO3 )(HNO3 )(TBP)2 ](+) and one C4 mim(+) . As a consequence of this mechanism, the variation of DU as a function of TBP concentration depends on the C4 mim(+) concentration in the aqueous phase. This explains why noninteger values are often derived by analysis of DU versus [TBP] plots to determine the number of TBP molecules involved in the extraction of uranyl in an ionic-liquid phase.

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“…On the other hand, phosphonate‐functionalized ILs have been used for the delicate task of extraction of radioactive Pu IV , U VI and Am III ions from HNO 3 solutions,101 whereas the extraction of the more common Cu II from water has recently been investigated by Dupont and co‐workers102 using ester‐functionalized ILs, tributyl(2‐ethoxy‐2‐oxoethyl)ammonium dicyanamide and bis(trifluoromethanesulfonyl)imide. It is noteworthy that good extracting properties with respect to Cu II , Fe III , Ni II and Mn II ions had already been shown for a simple ammonium salt ([N 8881 ] + ) with salicylate as the counter anion 103…”

Section: Applicationsmentioning

confidence: 99%

Visible‐Light‐Mediated Addition of α‐Aminoalkyl Radicals to [60]Fullerene by Using Photoredox Catalysts

Miyake

Ashida

Nakajima

et al. 2014

Chemistry A European J

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The functionalization of fullerene has been extensively studied and various fullerene derivatives have been synthesized. We have succeeded in the functionalization of [60]fullerene by using α-aminoalkyl radicals generated by visible-light-mediated single-electron oxidation of α-silylamines as synthetic intermediates. In these reactions, the introduction of diarylamino groups, which are useful electron donors, has been easily achieved.

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Task-specific ionic liquid with coordinating anion for heavy metal ion extraction: Cation exchange versus ion-pair extraction

Cited by 75 publications

References 43 publications

Copper extraction using protic ionic liquids: Evidence of the Hofmeister effect

Copper extraction using protic ionic liquids: Evidence of the Hofmeister effect

Insights into the Mechanism of Extraction of Uranium (VI) from Nitric Acid Solution into an Ionic Liquid by using Tri‐n‐butyl phosphate

Visible‐Light‐Mediated Addition of α‐Aminoalkyl Radicals to [60]Fullerene by Using Photoredox Catalysts

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