A mechanism for solvent extraction of first row transition metals from chloride media with the ionic liquid tetraoctylammonium oleate

Parmentier, Dries; Hoogerstraete, Tom Vander; Banerjee, Dipanjan; Valia, Yash A.; Metz, S.J.; Binnemans, Koen; Kroon, Maaike C.

doi:10.1039/c6dt00833j

Cited by 29 publications

(12 citation statements)

References 57 publications

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“…These extractants showed high extraction efficiency for period 4 transition metals (>99%). Parmentier et al [49] studied the mechanism of the extraction of zinc(II), cobalt(II), and nickel(II) from chloride solutions with the N 8888 C18:1 IL. The mechanism of nickel and cobalt extraction is based on the formation of a metal-IL complex comprising three ionic liquid molecules.…”

Section: Transition Metals Of Periods 3 and 4 Of The Periodic Table Of Elementsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

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This review addresses research and development on the use of ionic liquids as extractants and diluents in the solvent extraction of metals. Primary attention is given to the efficiency and selectivity of metal extraction from industrial wastewater with ionic liquids composed of various cations and anions. The review covers literature sources published in the period of 2010–2021. The bibliography includes 98 references dedicated to research on the extraction and separation of lanthanides (17 sources), actinides (5 sources), heavy metals (35 sources), noble metals, including the platinum group (16 sources), and some other metals.

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Section: Transition Metals Of Periods 3 and 4 Of The Periodic Table Of Elementsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

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“…To further confirm the assumption of FT-IR characterization and elucidate the extraction mechanism, the slope analysis method is applied to investigate the extraction performances of [HbetPy][Tf 2 N] and [HbetMor][Tf 2 N] from the nitrate and chloride media, respectively (Figures b and S10, Supporting Information). − Taking [HbetPy][Tf 2 N] as an example, the extraction of Sc(III) ions toward the IL phase can be written as a proton-exchange reaction on the basis of the previous analysis that nitrate or chloride is not involved in the extraction process (as shown in eq ). The extraction constant ( K ) can be defined as given in eq . where the upper bar indicates the species in the IL phase.…”

Section: Results and Discussionmentioning

confidence: 99%

Enhanced Homogeneous Liquid–Liquid Extraction for the Selective Recovery of Sc(III) by Novel UCST-Type Ionic Liquids

Zhang

Deng

Guo

et al. 2021

ACS Sustainable Chem. Eng.

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Developing the efficient ionic liquid (IL)-based extractants for the solvent extraction of the rare earth elements (REEs) is crucial but still facing challenges. In this study, two carboxylic acid-functionalized upper critical solution temperature (UCST)-type ILs, N -carboxymethylpyridinium bis-(trifluoromethylsulfonyl)imide ([HbetPy][Tf 2 N]) and N-carboxymethyl-N-methylmorpholinium bis(trifluoromethylsulfonyl)imide ([HbetMor][Tf 2 N]), are successfully synthesized and characterized. The extraction and separation performance toward scandium [denoted as Sc(III)] in nitrate medium aqueous solution have been carefully investigated in the homogeneous liquid−liquid extraction system under different conditions (e.g., equilibrium time, initial acidity, salting-out agent concentration, and REE concentration). The results reveal that the enhanced extractabilities of Sc(III) can be observed in homogeneous extraction compared to the biphasic system owing to the improved metal ion transfer and accelerated extraction kinetics. Meanwhile, [HbetPy][Tf 2 N] and [HbetMor][Tf 2 N] both illustrate high selectivity for Sc(III) separated from another five REEs (including La, Nd, Eu, Ho, and Yb), with the separation factors of 749 and 499 for Sc(III)/Yb(III), respectively. Moreover, the mechanism investigation indicates the formation of the Sc(III) complex via a proton exchange, evolved from the slope analysis and Fourier-transform infrared results.This study provides a prototype for the construction of the homogeneous liquid−liquid extraction system via the novel UCST-type ILs for highly efficient REE extraction and supplies the future application for the recovery of REEs from wastes.

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“…Here, we report the ability of task-specific ionic liquids to remove heavy metals from water. The quaternary ammonium cations derivative of betaine {tri(n-butyl)(-ethoxy-2-oxoalkyl)ammonium (BuNC n + )} were associated to non-fluorinated coordinating anion such as sacharinate (Sac = C 7 H 4 NO 3 S − ), chlorosalicylate (ClSal = C 7 H 5 O 3 − ) and dicyanamide (Dca = C 2 N 3 − ) to generate hydrophobic ionic liquids ( Figure 1), use as pure extracting phase [13,27,28]. The potential of ILs with chelating anions, as extracting agents, was investigated towards divalent toxic metals Cu(II), Cd(II), Ni(II), Co.(II) and Pb(II).…”

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confidence: 99%

Novel Task Specific Ionic Liquids to Remove Heavy Metals from Aqueous Effluents

Diabate

Dupont

Boudesocque

et al. 2018

Metals

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Task Specific Ionic Liquids (ILs) were generated by association between a cationic ester derivative of betaine and coordinating inorganic anions such as dicyanamide (Dca − ), chlorosalycilate (ClSal) and saccharinate (sac). Extraction of Cu(II), Ni(II), Co.(II), Pb(II) and Cd(II) from water was performed with these ILs at room temperature. Our results show that ionic liquid with Clsal anions have a high extraction efficiency towards Cu(II), Ni(II), Cd(II), and Pb(II), whereas dicyanamide ionic liquid may extract efficiently Cu(II), Ni(II) Co.(II) and Cd(II). Ionic liquids with saccharinate anions are selective of Cd(II) ions. The extraction mechanism has been studied by the determination of the coextraction of the counter ion of the metal salt. Our results show that the extraction mechanism proceeds via a mixed process involving both cation exchange and ion-pairing. The proportion of which depends on the nature of the cation. The coordination of Cu(II), Ni(II) and Co.(II) in ionic liquid phase was followed by UV-vis spectroscopies. The metal could be back-extracted from the ionic liquid phase with aqueous EDTA solutions. The metal extractability of the ionic liquid after the back-extraction is equivalent to that of the fresh mixture showing that ionic liquid can be reused for several extraction and back-extraction cycles.

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A mechanism for solvent extraction of first row transition metals from chloride media with the ionic liquid tetraoctylammonium oleate

Cited by 29 publications

References 57 publications

Ionic Liquids as Components of Systems for Metal Extraction

Ionic Liquids as Components of Systems for Metal Extraction

Enhanced Homogeneous Liquid–Liquid Extraction for the Selective Recovery of Sc(III) by Novel UCST-Type Ionic Liquids

Novel Task Specific Ionic Liquids to Remove Heavy Metals from Aqueous Effluents

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