Separation of ethyl acetate and ethanol azeotrope mixture using dialkylphosphates-based ionic liquids as entrainers

Zhang, Zhigang; Wu, Kaifang; Zhang, Qinqin; Zou, Tao; Zhang, Debiao; Yang, Ru Dong; Li, Wenxiu

doi:10.1016/j.fluid.2017.09.016

Cited by 27 publications

(20 citation statements)

References 33 publications

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“…Among them, the NRTL model has a simple structure and the application scope is wide. Also, the NRTL model has been used many times in other literature studies − for alcohol and ester systems, and the deviation value between experimental data and calculated data by the NRTL model is the smallest. Therefore, we selected the NRTL model in this study.…”

Section: Data Fittingmentioning

confidence: 99%

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Han

Wang

et al. 2021

J. Chem. Eng. Data

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As there is an azeotropic point between methanol and ethyl formate, they cannot be completely separated by ordinary distillation. In this paper, extractive distillation was applied and dimethyl sulfoxide (DMSO) and ethylene glycol (EG) were used as entrainers. Vapor−liquid equilibrium (VLE) data for methanol−ethyl formate, methanol−ethyl formate−DMSO, and methanol− ethyl formate−EG were measured at 101.3 kPa, and the NRTL model was applied for data fitting. It was found that the experimental value and the calculated value were accordant well through the deviation value. Then, the NRTL model was used for simulation by Aspen Plus to achieve the separation goal, and it verified the feasibility of the experimental scheme.

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Section: Data Fittingmentioning

confidence: 99%

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Han

Wang

et al. 2021

J. Chem. Eng. Data

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“…EVDOKIMOV et al [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The choice of 1,3-dimethyl-2-phenylimidazolinium bromide as a separating agent is explained by its melting point (according to [21]) being much lower than that of the imidazolinium salt used earlier for the separation of the azeotropic mixture acetone-methanol (1,3-bis(2,4,6-trimethylphenyl) imidazolinium chloride) [3], and by other no less important circumstances: the availability of reagents and the relative simplicity of its synthesis [21].…”

Section: Physical Chemistry Of Separation Processes: Chromatographymentioning

confidence: 99%

Imidazolinium Ionic Liquid as Effective Separating Agent for Binary Azeotropic Systems

Evdokimov

Kurzin

Feofanova

et al. 2021

Russ. J. Phys. Chem.

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One means of extractive distillation is salt rectification. Using an ionic liquid with an imidazolinium cation, binary azeotropic systems methyl acetate-methanol and ethyl acetate-ethanol are separated into components. 1,3-Dimethyl-2-phenylimidazolinium bromide is used as the imidazolinium salt. The effect organic salt has on the liquid-vapor equilibrium and the breaking of azeotropes in the systems is investigated in a modified Othmer still at 101.3 kPa via gas chromatographic analysis. It is found that concentrations of 1,3-dimethyl-2-phenylimidazolinium bromide (in mole fractions) of at least 0.2 and 0.25 are required for separating azeotropic systems methyl acetate-methanol and ethyl acetate-ethanol.

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“…The key to extractive distillation is choosing a suitable entrainer. Conventional entrainers, − such as organic solvents and inorganic salts, have the disadvantages of excessive solvent consumption, toxicity, and corrosion to pipelines.…”

Section: Introductionmentioning

confidence: 99%

Separation of the Dimethyl Carbonate + Ethanol Mixture Using Imidazolium-Based Ionic Liquids as Entrainers

Zhang

Wang

et al. 2020

J. Chem. Eng. Data

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The mixture of dimethyl carbonate (DMC) and ethanol is a common binary azeotrope system in industry that cannot be effectively separated by conventional separation methods. Two ionic liquids (ILs), namely, 1-butyl-3methylimidazolium dibutylphosphate ([BMIM][DBP]) and 1-butyl-3-methylimidazolium acetate ([BMIM][Ac]), were tried as novel entrainers for the separation of the DMC−ethanol azeotrope. The vapor−liquid equilibrium (VLE) data of the DMC−ethanol binary system and the DMC−ethanol−ILs ternary system at atmospheric pressure were determined. The results showed that both ILs could increase the relative volatility of DMC to ethanol, thus completely breaking the azeotrope at a certain concentration, and [BMIM][Ac] had more excellent separation capacity than [BMIM][DBP]. The NRTL model and the UNIFAC-Lei model were used to correlate the experimental VLE data, and the fitting results indicated that the NRTL model was in good agreement with the experimental data.

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Separation of ethyl acetate and ethanol azeotrope mixture using dialkylphosphates-based ionic liquids as entrainers

Cited by 27 publications

References 33 publications

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Vapor–Liquid Equilibrium Experiment and Process Simulation for Methanol and Ethyl Formate at 101.3 kPa

Imidazolinium Ionic Liquid as Effective Separating Agent for Binary Azeotropic Systems

Separation of the Dimethyl Carbonate + Ethanol Mixture Using Imidazolium-Based Ionic Liquids as Entrainers

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