Relative hydrophobicity of equilibrium phases in biphasic systems (ionic liquid+water)

Maia, Filipa M.; Rodrı́guez, Oscar; Macedo, Eugénia A.

doi:10.1016/j.jct.2011.12.025

Cited by 28 publications

(25 citation statements)

References 59 publications

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“…The obtained values are in good agreement with previous published data: about 5 m M for [C 1 C 6 im + ][Tf 2 N − ] contacted with pure H 2 O43 or 16 m M using [C 1 C 4 im][Tf 2 N] in contact with pure H 2 O at 20 °C44 or 16.5 m M at 25 °C 45…”

Section: Resultssupporting

confidence: 92%

Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

et al. 2014

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Efficient transformation of biomass-derived feedstocks to chemicals and fuels remains a daunting challenge in utilizing biomass as alternatives to fossil resources. A three-phase catalytic system, consisting of an aqueous phase, a hydrophobic ionic-liquid phase, and a solid-acid catalyst phase of nanostructured vanadium phosphate and mesostructured cellular foam (VPO-MCF), is developed for efficient conversion of biomass-derived fructose to 5-hydroxymethylfurfural (HMF). HMF is a promising, versatile building block for production of value-added chemicals and transportation fuels. The essence of this three-phase system lies in enabling the isolation of the solid-acid catalyst from the aqueous phase and regulation of its local environment by using a hydrophobic ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf2N]). This system significantly inhibits the side reactions of HMF with H2O and leads to 91 mol % selectivity to HMF at 89 % of fructose conversion. The unique three-phase catalytic system opens up an alternative avenue for making solid-acid catalyst systems with controlled and locally regulated microenvironment near catalytically active sites by using a hydrophobic ionic liquid.

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Section: Resultssupporting

confidence: 92%

Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

et al. 2014

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“…We have presented (ESI, † Fig. 19 Moreover, mutual miscibility increases with temperature in accord with the Upper Critical Solution Temperature found by Freire et al 10 for these kinds of systems. The solubility of water decreases with the IL-cation alkyl chain length, n, reaching a minimum for n = 8 and increasing again for higher number of carbons.…”

Section: Resultssupporting

confidence: 89%

Measurement and PC-SAFT modelling of three-phase behaviour

Rodríguez-Palmeiro

Rodrı́guez

Soto

et al. 2015

Phys. Chem. Chem. Phys.

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Modelling of multi-component systems with complex interactions is an ongoing challenge in thermodynamics due to their great relevance in industry and academia. Systems that build three liquid phases are found in many interesting applications (separation processes, triphasic catalysis…). Among them, the surfactant flooding method for enhanced oil recovery is noticeable. In this method, a stable solution of water, surfactants, co-surfactants, salts and other components is injected into the reservoir. The optimal formulation of this surfactant system is associated with a three-phase behaviour in which the interfacial tension becomes significantly low. In this work, the PC-SAFT equation of state was used for the first time to predict the equilibrium involved in triphasic systems using solely pure-component parameters. The model without any fitting parameter was able to predict the three-phase behaviour. A great agreement between experimental and predicted compositions for (water + [C10mim][NTf2] + n-dodecane) and (water + [C12mim][NTf2] + n-dodecane) ternary systems at 298.15 K and atmospheric pressure was found. At 348.15 K slightly higher deviations were found, which can be compensated by the introduction of just one binary interaction parameter. The success of this achievement could mean an important advancement in upstream oil operations, enabling a faster and cheaper method to carry out an initial screening of potential surfactants.

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“…In some cases, the IL solubility significantly decreased as the length or number of the alkyl chain increased. However, according to Maia et al (2012) . The ILs with a larger molecular size had lower charge densities and polarities, which contributed to a lower IL solubility.…”

Section: Resultsmentioning

confidence: 99%

Phase Equilibria for Binary Systems Containing Ionic Liquid With Water or Hydrocarbons

Santos

Góes²,

Franceschi³

et al. 2015

Braz. J. Chem. Eng.

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Relative hydrophobicity of equilibrium phases in biphasic systems (ionic liquid+water)

Cited by 28 publications

References 59 publications

Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

Measurement and PC-SAFT modelling of three-phase behaviour

Phase Equilibria for Binary Systems Containing Ionic Liquid With Water or Hydrocarbons

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Relative hydrophobicity of equilibrium phases in biphasic systems (ionic liquid+water)

Cited by 28 publications

References 59 publications

Three‐Phase Catalytic System of H2O, Ionic Liquid, and VOPO4–SiO2 Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

Three‐Phase Catalytic System of H2O, Ionic Liquid, and VOPO4–SiO2 Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

Measurement and PC-SAFT modelling of three-phase behaviour

Phase Equilibria for Binary Systems Containing Ionic Liquid With Water or Hydrocarbons

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Product

Resources

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Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural

Three‐Phase Catalytic System of H₂O, Ionic Liquid, and VOPO₄–SiO₂ Solid Acid for Conversion of Fructose to 5‐Hydroxymethylfurfural