New ionic liquids with fluorous anions for supported liquid membranes and characterization

Jean, Etienne; Villemin, Didier; Lebrun, Laurent

doi:10.1016/j.jfluchem.2019.109365

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Before scaling up the technology in the form of hollow fiber modules, the investigation of a given system, using supported liquid membrane in flat-sheet configuration, is necessary in order to obtain information about the mass transfer process involved in the membrane operation. One important part, in real terms the key-of-the-operation, is the carrier used to transport the metals, and included in them, ionic liquids are a group of chemicals, which properties make of them to be considered as green solvents, and among other uses [15][16][17][18] suitable for the removal of metals from aqueous solutions [19][20][21][22][23][24][25][26][27][28] .…”

Section: Introductionmentioning

confidence: 99%

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

López¹

2020

Preprint

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The transport of indium(III), from HCl solutions, across a supported liquid membrane in flat-sheet configuration was investigated, being the carrier the ionic liquid HA324H+Cl- (derived from the tertiary amine Hostarex A324 and hydrochloric acid). Different variables affecting the metal transport: hydrodynamic conditions in the source and receiving phases, metal and HCl concentrations in the source phase, and carrier concentration in the membrane phase, were investigated. Also the transport of indium(III) using carriers of various nature: ionic liquids, alcohol, ketone, phosphine oxide and phosphoric ester, was compared. The metal transport was modelled describing the transport mechanism as: diffusion across the source diffusion layer, a fast interfacial chemical reaction, and diffusion of the InCl4--carrier complex through the membrane support. Diffusional parameters for the transport of indium(III), from the experimental data and the model, were estimated.

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Section: Introductionmentioning

confidence: 99%

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

López¹

2020

Preprint

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“…These traces are attributed to HFDOD and indicate that this fluorinated extractant is retained into the membranes. The affinity of fluorinated compounds for the fluorinated polymer is a way to avoid the leaching of the organic phase and to promote membrane stability [45]. In our case, lithium extraction and transport performances are highly related to the concentration and ratio of extractants molecules in the organic phase ( Fig.…”

mentioning

confidence: 85%

Highly selective transport of lithium across a supported liquid membrane

Zante

Boltoeva

Masmoudi

et al. 2020

Journal of Fluorine Chemistry

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Lithium extraction is a major concern in view of the increase in battery manufacturing. Separation of lithium from sodium is still challenging due to the similar chemical behavior of the two alkali metals. Sources such as brines or seawater usually contain large amounts of sodium which requires a high selectivity for the lithium extraction process. In this study, we demonstrate the application of a supported liquid membrane (SLM) with very high selectivity for the separation of lithium from sodium. A synergistic system made of heptafluorodimethyloctanedione (HFDOD) and tri-octyl phosphine oxide (TOPO) was selected based on its extraction efficiency (>99% of lithium extracted) and selectivity for lithium over sodium (separation factor≈400). Several parameters were studied using a SLM made of HFDOD and TOPO (lithium concentration, sodium to lithium ratio, HFDOD: TOPO ratio). It was found that high lithium permeation rates can be obtained even for low lithium concentrations and high 2 sodium concentration. Membrane stability was evaluated and was found to be poor (loss of performances after one cycle of use), due to the leakage of the organic phase and change in HFDOD: TOPO ratio. This SLM system is suitable for the extraction of lithium from brines and seawater.

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Tuning of Ionic Liquid Crystal Properties by Combining Halogen Bonding and Fluorous Effect

et al. 2021

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We report halogen-bonded complexes between 1-polyfluoroalkyl-3-alkylimidazolium iodides and mono-iodoperfluoroalkanes of different chain lengths or di-iodoperfluorooctane. 19 F NMR analyses revealed that the preferred stoichiometry between the donors and acceptors is 1 : 1 in the cases of the mono-iodoperfluoroalkanes, and 2 : 1 with di-iodoperfluorooctane, as a result of the monodentate behavior of the iodide anion (halogen bond acceptor). Single crystal X-ray diffraction analyses showed the presence of a perfluorinated superanion, which interdigitates with the cation fluorinated chains, favoring the formation of lamellar structures. All of the obtained supramolecular complexes exhibit enantiotropic liquid crystalline phases over a broad range of temperatures. Most of the obtained complexes show melting points lower than 100°C, two of them being liquid at room temperature, thus representing a new family of fluorinated ionic liquid crystals.

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New ionic liquids with fluorous anions for supported liquid membranes and characterization

Cited by 5 publications

References 26 publications

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

Highly selective transport of lithium across a supported liquid membrane

Tuning of Ionic Liquid Crystal Properties by Combining Halogen Bonding and Fluorous Effect

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