The isobaric vapor liquid equilibria of ethyl acetate + acetonitrile + bis(trifluoromethylsulfonyl)imide-based ionic liquids at 101.3 kPa

Zhu, Jiujuan; Li, Qunsheng; Li, Manman; Song, Xiaoling; Tang, Hongjian; Liu, Yudong

doi:10.1016/j.fluid.2016.06.022

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…Binary VLE data of ethyl acetate (1) + acetonitrile (2) matched well with published literature values, as shown in Figures and S3 in Supporting Information. , …”

Section: Resultssupporting

confidence: 86%

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Yue,

Lu,

Chen

et al. 2024

J. Chem. Eng. Data

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Isobaric vapor–liquid equilibrium (VLE) data for the ternary system of ethyl acetate + acetonitrile + acetate-based ionic liquids (ILs) were obtained with a modified Othmer still at 101.3 kPa, and the used ILs were 1-butyl-3-methylimidazolium acetate ([BMIM][Ac]) and 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]). The VLE data were correlated with the nonrandom two-liquid model and fitted well, indicating that the minimum mole fractions of [BMIM][Ac] and [EMIM][Ac] to eliminate azeotrope were 0.028 and 0.067, respectively. Both [BMIM][Ac] and [EMIM][Ac] led to a salting-out effect on ethyl acetate, and a higher concentration of ILs signified a stronger salt effect. In addition, interactions between ILs and solvents were estimated, and the polarity was analyzed with the σ-profiles, revealing the effect of ILs and the separation mechanism of the ternary system. The results indicated that both [BMIM][Ac] and [EMIM][Ac] could be qualified as solvents to separate ethyl acetate and acetonitrile. Based on the experimental data measured on the equilibrium scale and the separation mechanism calculated at the molecular scale, this work provides a useful strategy for studying the application of IL in extractive distillation in the future.

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“…Binary VLE data of ethyl acetate (1) + acetonitrile (2) matched well with published literature values, as shown in Figures and S3 in Supporting Information. , …”

Section: Resultssupporting

confidence: 86%

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Yue,

Lu,

Chen

et al. 2024

J. Chem. Eng. Data

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“…Albeit a larger number of studies focused on the determination of thermophysical properties, e.g., viscosities or densities, ,, systematic studies on the phase behavior of these mixtures are scarce. While in the past many investigations dealt with the liquid–liquid phase behavior, − a much smaller number of studies focused on vapor liquid equilibria (VLE). ,− Those focused on VLE were mainly performed applying classical VLE set-ups, stills, and ebulliometers; for an overview of the different experimental techniques see refs , , , and − .…”

Section: Introductionmentioning

confidence: 99%

Vapor Liquid Equilibria of Binary Mixtures of 1-Butyl-3-methylimidazolium Triflate (C₄mimTfO) and Molecular Solvents: n-Alkyl Alcohols and Water

et al. 2018

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Isobaric vapor liquid equilibria (VLE) of binary mixtures of the ionic liquid (IL) 1-butyl-3-methylimidazolium trifluoromethanesulfonate (CmimTfO) with either water or short chained n-alkyl alcohols (methanol, ethanol, propan-1-ol, and butan-1-ol) are described in this study. Two different microebulliometers and a classical VLE apparatus were compared and the VLEs were determined in the composition range 0.4 ≤ x(solvent) ≤ 1 at three different pressure levels ( p = 500 mbar, 700 mbar, and 1000 mbar). The experimental data were modeled using the soft-SAFT equation of state, which was able to accurately describe the nonideal behavior of these mixtures. The combined experimental-modeling results obtained contribute to establish the structure-property relationship between the CmimTfO and n-alkyl alcohol molecules and to infer about its influence on the phase behavior of these solvents.

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“…The success of complex extractive distillation depends on selecting a suitable complex extractant. The extractant should take advantage of the reversible chemical reaction between metal ions and unsaturated hydrocarbons, such as olefin, to significantly improve the relative volatility of complex and saturated hydrocarbons and achieve separation from saturated hydrocarbons. − The principle of extractive distillation for butane–butene separation is based on the different electron cloud fluidity of butane and butene. Butane molecules do not have flowing electron clouds, whereas butene molecules have a pair of flowable electron clouds, so their attractiveness is different when a polar solvent is added.…”

Section: Introductionmentioning

confidence: 99%

Data Determination and Process of Vapor–Liquid Equilibrium of Butane–Butene System by Complex Extractive Distillation Using Salt

Cao

Luan

et al. 2022

Ind. Eng. Chem. Res.

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The refined utilization of various parts of hybrid residual C4 has received increasing attention, but the mixed C4 is difficult to separate due to complex components and close boiling points. This paper proposes an innovative separation method using complex extractive distillation by adding cuprous chloride ethanolamine (C2H7NO–CuCl) into the conventional extractant, as a complexing agent. The vapor–liquid equilibrium (VLE) data were measured for six different systems, namely, the mixed C4–dimethylformamide (DMF) system and the mixed C4–DMF–C2H7NO–CuCl system, the mixed C4–acetonitrile (ACN) system and the mixed C4–ACN–C2H7NO–CuCl system, and the mixed C4–methyl–ethyl ketone (MEK) system and the mixed C4–MEK–C2H7NO–CuCl system. Results showed that the relative volatility of butane–butene solution was significantly increased with the addition of the complexing agent systems. After careful consideration of various influencing factors, the mixed C4–MEK–C2H7NO–CuCl system was selected as the best extraction separation system, and technological experiments were carried out to further explore its feasibility and advanced nature. Results showed that when the solvent-to-feed ratio (S/F) was 12.5, the reflux ratio of extractive distillation column (R 1) was 1.5, and the reflux ratio of solvent recovery column (R 2) was 2.5, the purity of butene was more than 97.0%, and the separation yield was more than 95.0%. Furthermore, the solvent-to-feed ratio of complex extractive distillation was only 70% of ordinary extractive distillation, the reflux ratio was only 60% of ordinary extractive distillation, and the stripping temperature of the complex extractive distillation column was only about 423.15 K, which was lower than that of the ordinary extractive distillation column.

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The isobaric vapor liquid equilibria of ethyl acetate + acetonitrile + bis(trifluoromethylsulfonyl)imide-based ionic liquids at 101.3 kPa

Cited by 11 publications

References 37 publications

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Vapor Liquid Equilibria of Binary Mixtures of 1-Butyl-3-methylimidazolium Triflate (C₄mimTfO) and Molecular Solvents: n-Alkyl Alcohols and Water

Data Determination and Process of Vapor–Liquid Equilibrium of Butane–Butene System by Complex Extractive Distillation Using Salt

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The isobaric vapor liquid equilibria of ethyl acetate + acetonitrile + bis(trifluoromethylsulfonyl)imide-based ionic liquids at 101.3 kPa

Cited by 11 publications

References 37 publications

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Vapor–Liquid Equilibrium for Ethyl Acetate + Acetonitrile with Acetate-Based Ionic Liquids as Entrainers at 101.3 kPa and Analysis of the Separation Mechanism

Vapor Liquid Equilibria of Binary Mixtures of 1-Butyl-3-methylimidazolium Triflate (C4mimTfO) and Molecular Solvents: n-Alkyl Alcohols and Water

Data Determination and Process of Vapor–Liquid Equilibrium of Butane–Butene System by Complex Extractive Distillation Using Salt

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Vapor Liquid Equilibria of Binary Mixtures of 1-Butyl-3-methylimidazolium Triflate (C₄mimTfO) and Molecular Solvents: n-Alkyl Alcohols and Water