Liquid–liquid equilibria for ternary mixtures of water + 2-propanol + 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids at 298.15 K

Liu, Wei; Zhang, Zhen; Ri, Yongsaeng; Xu, Xicai; Wang, Yinglong

doi:10.1016/j.fluid.2015.12.051

Cited by 60 publications

(42 citation statements)

References 56 publications

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“…The results reveal that the solubility of 1-methylimidazole in ionic liquid is higher than that in water, indicating that there was a closer affinity between 1-methylimidazole and IL than that between 1-methylimidazole and water. Therefore, the slope of liquid–liquid equilibrium tie-lines shown in the figures revealed that there was a closer affinity between 1-methylimidazole and IL than that between 1-methylimidazole and water . As shown in Figure , it could be observed that with the decreasing temperature, the immiscibility region of the system reduced.…”

Section: Resultsmentioning

confidence: 80%

“…Therefore, the slope of liquid−liquid equilibrium tie-lines shown in the figures revealed that there was a closer affinity between 1-methylimidazole and IL than that between 1-methylimidazole and water. 22 As shown in Figure 4, it could be observed that with the decreasing temperature, the immiscibility region of the system reduced. The reason might be that the reduction of the temperature of the ternary system led to the decrease of the solubility of 1methylimidazole in the water and IL.…”

Section: Resultsmentioning

confidence: 82%

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Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

2021

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To obtain the basic data for the recovery of 1-methylimidazole from wastewater by extraction, the ternary liquid−liquid phase equilibrium data of the water (1) + 1-methylimidazole (2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]) (3) system were determined using an equilibrium autoclave at the temperatures of 303.15 to 323.15 K and 101.32 kPa. The solute distribution coefficient (D) and the selectivity (S) of the ternary system were calculated in accordance with the experimental data. Their values were up to 1.39 and 41.17, respectively, which showed that the ionic liquid can extract 1-methylimidazole effectively. The experimental results showed that the temperature had a slight effect on the liquid−liquid equilibrium behavior. Meanwhile, the calculated results revealed that the selectivity coefficient decreased with the enhancing concentration of 1-methylimidazole in the ternary system and the increasing temperature. In addition, the nonrandom two liquid (NRTL) model was used for correlation of the ternary systems. The root-mean-square deviation value of 0.0218 indicated that the calculated results using the model were in good agreement with the experimental data and were reliable to apply to practice.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 82%

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

2021

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“…Also, ionic liquids have been applied in separating the aqueous mixture of isopropanol. Liu et al (2016) selected strongly hydrophobic imidazolium ionic liquids with the [NTf 2 ](bis(trifluoromethylsulfonyl) imide) anion to extract isopropanol from its aqueous solution and explored the effect of the alkyl chain of the cation on extraction ability. Zhang et al (2016) added ionic liquids to the binary azeotrope (isopropanol + water) and found that the addition of ionic liquids enhanced the relative volatility of 2-propanol to water dramatically.…”

Section: Introductionmentioning

confidence: 99%

Separation of isopropanol from its aqueous solution with deep eutectic solvents: liquid–liquid equilibrium measurement and thermodynamic modeling

Meng

Liu

et al. 2020

Braz. J. Chem. Eng.

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In this work, to separate the azeotrope of isopropanol and water using liquid-liquid extraction, two deep eutectic solvents (DESs) were prepared with methyl trioctyl ammonium chloride and (1-hexanol/1-decanol), which were characterized by 1 H NMR and were adopted as extractants. The liquid-liquid equilibrium data for the mixtures (DESs + isopropanol + water) were determined at 298.15 K and 308.15 K. The distribution ratio (D) and separation factor (S) were obtained to judge the extraction performance for the selected DESs. The calculated values of D and S showed that the separation of the mixture isopropanol and water by the DESs is feasible. In addition, the experimental data were successfully fitted by the NRTL model with the RMSD values less than 0.0080. The parameters of the NRTL model were optimized, which is helpful for the separation design and simulation.

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“…A traditional organic solvent is easy to obtain and low cost but suffers from some drawbacks, such as volatility and corrosiveness. Recently, ionic liquids (ILs) have become a focus of researchers, and they have proven to be a type of promising green solvent because of their undetectable vapor pressure, good dissolution properties and high decomposition temperature …”

Section: Introductionmentioning

confidence: 99%

“…Recently, ionic liquids (ILs) have become a focus of researchers, and they have proven to be a type of promising green solvent because of their undetectable vapor pressure, good dissolution properties and high decomposition temperature. [8][9][10][11][12] In an extractive distillation process, ILs can achieve high-efficiency recovery due to their non-volatility. As a type of green solvent, ILs have attracted attention because of the important roles that they have played in areas of chemical research.…”

Section: Introductionmentioning

confidence: 99%

Process design of carbon dioxide and ethane separation using ionic liquid by extractive distillation

Zhu

Geng

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Carbon dioxide and ethane easily form a binary azeotrope under liquefied conditions. An extractive distillation process for the separation of carbon dioxide and ethane using the ionic liquids [bmim][Tf2N], [emim][Tf2N] and [emim][EtSO4] as solvents was explored. The thermodynamic and physical property parameters of each ionic liquid and their thermo‐physical properties that correlated with the experimental data were used to create the ionic liquid components and conduct the process simulation. RESULT Based on the analysis of its physical properties and relative volatilities, [emim][Tf2N] is the best option as a solvent for extractive distillation separation compared with other ionic liquids. Based on the sensitivity analysis optimization procedure, the minimum total annual cost, carbon dioxide emissions and thermodynamic efficiency were calculated. Compared with traditional extraction distillation, the total annual cost and carbon dioxide emissions of the process using [emim][Tf2N] as a solvent decreased by 62% and 31%, respectively. The thermodynamic efficiency (η) of the electricity generated from hydropower increase by 0.7%. CONCLUSION The results show that an ionic liquid extractive distillation process using an ionic liquid as the entrainer performs better than a process using traditional organic solvents in terms of economics. Due to the non‐volatility of ionic liquids, a flash tank was used instead of a solvent recovery column to efficiently realize solvent recovery. © 2017 Society of Chemical Industry

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Liquid–liquid equilibria for ternary mixtures of water + 2-propanol + 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids at 298.15 K

Cited by 60 publications

References 56 publications

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

Separation of isopropanol from its aqueous solution with deep eutectic solvents: liquid–liquid equilibrium measurement and thermodynamic modeling

Process design of carbon dioxide and ethane separation using ionic liquid by extractive distillation

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Liquid–liquid equilibria for ternary mixtures of water + 2-propanol + 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids at 298.15 K

Cited by 60 publications

References 56 publications

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF6] (3) Ternary Systems between 303.15 and 323.15 K

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF6] (3) Ternary Systems between 303.15 and 323.15 K

Separation of isopropanol from its aqueous solution with deep eutectic solvents: liquid–liquid equilibrium measurement and thermodynamic modeling

Process design of carbon dioxide and ethane separation using ionic liquid by extractive distillation

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Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K