Water/oil/[P6,6,6,14][NTf2] phase equilibria

Lago, Sara; Rodríguez-Cabo, Borja; Arce, Alberto; Soto, Ana

doi:10.1016/j.jct.2014.02.012

Cited by 21 publications

(24 citation statements)

References 15 publications

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“…With the aim of confirming the quality of the NRTL model to simultaneously correlate LLE and LLLE data for systems with ionic liquids, we have extended the correlation to other previously determined three-liquid-phase systems involving ionic liquids [33][34][35][36][37][38].…”

Section: Correlationmentioning

confidence: 88%

“…Most of the predictions of three-phase equilibria with interaction parameters obtained from binary systems do not adequately represent all the regions of the phase diagrams. [33][34][35][36][37][38] are correlated using the NRTL model. The correlations are carried out by simultaneously fitting the binary and ternary LLE data together with the LLLE tie-triangle of the systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation of three-liquid-phase equilibria involving ionic liquids

Rodríguez-Escontrela

Arce

Soto

et al. 2016

Phys. Chem. Chem. Phys.

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The difficulty of achieving a good thermodynamic description of phase equilibria is finding a model that can be extended to a large variety of chemical families and conditions. This problem gets worse in the case of systems containing more than two phases or involving complex compounds such as ionic liquids. However, there are interesting applications that involve multiphasic systems, and the promising features of ionic liquids suggest that they will play an important role in many future processes. In this work, for the first time, the simultaneous correlation of liquid-liquid and liquidliquid-liquid equilibrium data for ternary systems involving ionic liquids has been carried out. To that end, the phase diagram for the system water + [P 6 6 6 14 ][DCA] + hexane has been determined at 298.15 K and 323.15 K and atmospheric pressure. The importance of this system lies in the possibility of using the surface active ionic liquid to improve surfactant enhanced oil recovery methods. With those and previous measurements, thirteen sets of equilibrium data of ternary systems water + ionic liquid + oil have been correlated. The isoactivity equilibrium condition, using the NRTL model, and some pivotal strategies are proposed to correlate these complex systems.Good agreement has been found between experimental and calculated data in all the regions (one triphasic and two biphasic) of the diagrams. The geometric aspects related to the Gibbs energy of mixing function obtained with the model, together with the minor common tangent plane equilibrium condition, are valuable tools to check the consistency of the obtained correlation results.

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Section: Correlationmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Correlation of three-liquid-phase equilibria involving ionic liquids

Rodríguez-Escontrela

Arce

Soto

et al. 2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Also, density, viscosity and interfacial tension of the involved phases were investigated. 194 Experimental values of gas solubility of hydrofluorocarbons (CHF 3 195 A comparison between the Cubic plus Association equation of state and the regular-solution theory modelling was performed on the basis of the experimental measurements. Ramalingam and co-workers evaluated the performance of DES in the extractive denitrification of liquid fuels by the conductor-like screening model for real solvents.…”

Section: Extraction and Separation Technologies Based On Pilsmentioning

confidence: 99%

Phosphonium salts and P-ylides

Selva¹,

Perosa²,

Noè³

2016

Organophosphorus Chemistry

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“…Surfactant ionic liquids have also been proposed as suitable chemicals to be used in surfactant or micellar flooding due to its capacity to reduce oil/water interfacial tension and solubilise oil [12][13][14][15][16][17][18][19][20]. We have undertaken a study [12,13,[21][22][23] about the equilibria established among surfactant ionic liquids, water and ndodecane (as oil phase). We are looking for Winsor type III systems and an important reduction of interfacial tension.…”

Section: Introductionmentioning

confidence: 99%

“…We are looking for Winsor type III systems and an important reduction of interfacial tension. When systems are Treybal type III (ionic liquid immiscible with water and oil) [12,13,21,22], the formation of a three-phase system is highly probable. But even with surfactant ionic liquids miscible with oil and/or water, a Winsor Type III system can be found [23].…”

Section: Introductionmentioning

confidence: 99%