The impact of uni-univalent electrolytes on (water+acetic acid+toluene) equilibria: Representation with electrolyte-NRTL model

Saien, Javad; Fattahi, M.; Mozafarvandi, Maryam

doi:10.1016/j.jct.2014.02.005

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…The refractive index was applied to determine the mass fraction of components in the aqueous and organic phases. In this regard, the cloud-point method was used as described in previous works. , For this aim, a 5 cm 3 miniature cell, connected to a magnetic stirrer and with an isothermal fluid jacket was used. To control temperature, distilled water was circulated between thermostat (Julabo, Germany), the cell jacket, and the refractometer used to measure refractive index.…”

Section: Methodsmentioning

confidence: 99%

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Asrami

Saien

2019

J. Chem. Eng. Data

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The effect of three dissolved salts, namely, sodium chloride, sodium sulfate, and magnesium sulfate, on the liquid–liquid equilibrium of phenol extraction from aqueous phase by (propan-2-yl) benzene (cumene) was investigated at the temperature of 298.2 K and the ambient pressure of 81.5 kPa. Salts with mass fractions of 0.005 and 0.020 in water were used and significant enhancement in the phenol extraction was achieved compared to salt-free system. Results showed that the presence of salts caused the solute separation factor to reach as (46.29 and 95.81)% with NaCl, (63.52 and 165.19)% with Na2SO4, and (86.39 and 238.55)% with MgSO4, related to the used low and high salt concentrations. Therefore, the salting-out effect appeared in the order MgSO4 > Na2SO4 > NaCl, in agreement with the Hofmeister series. The Eisen–Joffe equation confirmed the consistency of experimental tie-line data. To correlate the obtained data, the well-known NRTL and UNIQUAC thermodynamic models were satisfactorily used and the maximum root-mean-square deviations were as low as 0.0071 and 0.0013 for these models, respectively.

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Section: Methodsmentioning

confidence: 99%

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Asrami

Saien

2019

J. Chem. Eng. Data

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“…Indeed, because of salting-out effect, the solubility of acetone in aqueous phase decreases in the presence of salts and therefore its extraction by the IL is significantly improved [10]. Fig.…”

Section: Tie-line Datamentioning

confidence: 99%

“…This matter can be explained by hydrating of salt ions where some of the water molecules surrounding electrolyte molecules become unavailable; therefore, the solute tendency is favored to transfer more from aqueous phase to organic phase [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical assessing the salts effect on the equilibrium of water + acetone + HMIMPF6 ionic liquid system

Saien

Badieh

Norouzi

2016

Separation and Purification Technology

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a b s t r a c tThe influence of naturally occurring monovalent NaCl and divalent Na 2 SO 4 salts with anions at near extremes of Hafmester series on liquid-liquid equilibrium (LLE) of the chemical system of {water + acetone + 1-Hexyl-3-methylimidazolium hexafluorophosphate (HMIMPF 6 ) ionic liquid} was studied. The conditions were 298.2 K, atmospheric pressure of 81.5 kPa and salts mass fractions in initial aqueous solutions of 0.05 and 0.10. Results show that salting-out effect was significant, so that enhancements in the acetone distribution coefficient was achieved within (21.67-35.54)% for NaCl and (51.84-92.37)% for Na 2 SO 4 . The stronger anion activity and the lack of anion exchange with the used ionic liquid can be the reasons for the stronger effect of the latter salt. The consistency of the experimental data were examined with the improved Eisen-Joffe equation. For modeling purpose, the NRTL and UNIQUAC equations were satisfactorily applied to correlate the phase equilibria. In the presence of NaCl and Na 2 SO 4 salts, the root mean square deviations of compositions, for NRTL equation were 0.0346 and 0.0634 and for UNIQUAC equation 0.1093 and 0.0328, respectively.

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“…In both these methods, acetic acid must be separated from dilute aqueous solutions. Because the separation of acetic acid by a distillation process is quite difficult and expensive, the liquid–liquid extraction process can be used by means of an appropriate organic solvent. − Toluene can be chosen as an appropriate solvent due to low vapor pressure, viscosity, and density, and its capability to form two distinct phases at ambient conditions. , Moreover, in recent years, there has been growing interest in the literature to use the ternary system of toluene–acetic acid–water (TAW). − Most of these studies have been conducted in the fields of transport and interfacial phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…(16) where μ, μ i , and x i are the viscosity of each phase, and viscosity and mole fraction of component i, respectively, and M ij is a constant representing the effect of interaction between components i and j on the viscosity of each phase. (17) where ρ, ρ i , and w i are the mass density of each phase, pure density, and the mass fraction of component i, respectively. R ij is a constant representing an interaction parameter and is a function of the components i and j.…”

Section: ■ Introductionmentioning

confidence: 99%

Liquid–Liquid Equilibrium Data, Density, Viscosity, and Interfacial Tension of Ternary System (Toluene–Acetic Acid–Water) at 298.15 K: Experiment and Correlation

2017

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Liquid−liquid equilibrium (LLE) data, density, viscosity, and interfacial tension for the ternary system of toluene−acetic acid− water were measured at 298.15 K and 101.7 kPa. The Othmer−Tobias and the Hand correlations were used to check the reliability of the experimental tie-lines. Moreover, the distribution coefficient and the separation factor were explored. It was found from the experimental results that a maximum separation factor value happens at an acetic acid mass fraction of 0.02 in the organic phase. Density, viscosity, and interfacial tension were correlated using the appropriate correlations such that the predicted results have excellent agreement with the experimental data. The experimental data in this work and the literature were correlated using both the nonrandom two-liquid (NRTL) and the universal quasi chemical (UNIQUAC) activity coefficient models at various temperatures (288.2, 298.15, 303.15, and 313.15 K). The experimental results were used to obtain binary interaction parameters in these models. The root-mean-square deviation (RMSD) values for both models were less than 3.58%, and the model predictions show acceptable agreement with the measured data particularly at the plait point.

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The impact of uni-univalent electrolytes on (water+acetic acid+toluene) equilibria: Representation with electrolyte-NRTL model

Cited by 6 publications

References 28 publications

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Salt Effects on Liquid–Liquid Equilibria of Water + Phenol + (Propan-2-yl) Benzene + Salts Systems

Experimental and theoretical assessing the salts effect on the equilibrium of water + acetone + HMIMPF6 ionic liquid system

Liquid–Liquid Equilibrium Data, Density, Viscosity, and Interfacial Tension of Ternary System (Toluene–Acetic Acid–Water) at 298.15 K: Experiment and Correlation

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