Isobaric vapor-liquid equilibria for tert-butanol + water with single and mixed ionic liquids as solvents at 101.3 kPa

Di, Jiahao; Cheng, Qinglong; Cui, Xianbao; Yu, Xufeng; Feng, Tingting; Zhang, Ying; Zhang, Xuemei; He, Jie; Wang, Jixiao

doi:10.1016/j.fluid.2019.02.022

Cited by 8 publications

(10 citation statements)

References 27 publications

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“…12. Moreover, α 12 with the addition of the two phosphate‐based ILs ([MMIM][DMP] or [EMIM][DEP]) is compared with that with the addition of other ILs or mixed solvents 23, 24, 26‐28 in Fig. 12.…”

Section: Resultsmentioning

confidence: 99%

“…The ILs triethanolamine lactic acid ([TEA] [Lc]), triethanolamine acetic acid and triethanolamine formic acid were used by Zhang et al 23 and the results showed that the separating efficiency of [TEA][Lc] was the best. The ILs 1-hexyl-3-methylimidazolium bromine, 1-butyl-3-methylimidazolium bromine and 1-ethyl-3-methylimidazolium bromine ([EMIM][Br]) were used by Zhang et al 24 28 and the results indicated that the azeotropic point could be destroyed after using the mixed solvent in various ratios.…”

Section: Introductionmentioning

confidence: 99%

“…and the results showed that the mixed solvent not only enhanced the volatility of TBA relative to water but also had lower viscosity compared with [EMIM][Cl]. The mixed solvent of [EMIM][DCA] and [EMIM][Ac] was used by Di et al 28 . and the results indicated that the azeotropic point could be destroyed after using the mixed solvent in various ratios.…”

Section: Introductionmentioning

confidence: 99%

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Isobaric vapor–liquid equilibrium of tert‐butanol + water + ionic liquids at atmospheric pressure

Jia

Zhang

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: tert-Butanol (TBA) and water form an azeotrope at atmospheric pressure. Therefore, extractive distillation was adopted to separate the azeotropic mixture. As a new kind of solvent, the ionic liquids (ILs) 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]) were chosen to break the azeotropic point in extractive distillation. RESULTS: For the ternary mixture of TBA + water + ILs, the isobaric vapor-liquid equilibrium data at atmospheric pressure for three IL mole fractions (0.1, 0.2 and 0.3) were measured. The results indicated that the volatility of TBA relative to water became higher after [MMIM][DMP] or [EMIM][DEP] was added. The nonrandom two-liquid (NRTL) model and the COSMO-RS theory were used to predict the ternary experimental data. The predicted results from the NRTL model showed good agreement with the experimental data. The predicted results from COSMO-RS showed that the vapor-phase mole fraction basically agreed with the experimental data and the equilibrium temperatures were lower than the experimental data. ⊞-Profiles, ⊞-potentials and ⊞-surfaces were calculated based on COSMO-RS. The results were the same as for the experiments, namely the interaction between water and ILs was stronger than other interactions; the affinity of water and [MMIM][DMP] was stronger than that of water and [EMIM][DEP].

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isobaric vapor–liquid equilibrium of tert‐butanol + water + ionic liquids at atmospheric pressure

Jia

Zhang

et al. 2020

J of Chemical Tech & Biotech

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“…The literature 19, 20, 22 gives the binary interaction parameters between the system and the ionic liquid, as shown in Tab. 3.…”

Section: Design Optimization Of the Azeotropic System For Separating ...mentioning

confidence: 99%

“…The Aspen Plus process simulation system was used to simulate the feasibility of the ionic liquid extractive distillation process, and the main operating conditions for the ionic liquid extractive distillation process to produce anhydrous ethanol were determined 21. Di et al studied the ionic liquid [EMIM][DCA] (DCA = dicyandiamide), and [EMIM][DCA] + [EMIM][AC] was used as an extractive distillation solvent to separate tert ‐butanol from water 22. Graczova et al studied the effect of [EMIM][Br] and [BMIM][Br] on the separation efficiency and economics of the tert ‐butanol‐water azeotropic mixture 23.…”

Section: Introductionmentioning

confidence: 99%

Energy‐Saving Separation of the Ethanol‐tert‐Butanol‐Water Azeotrope System Based on an Ionic Liquid

et al. 2022

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The separation requirements of the ethanol‐tert‐butanol‐water system are difficult to meet due to the formation of azeotropes under normal pressure. After screening the four most important ionic liquids, i.e., [BMIM][BF4], [EMIM][Cl], [HMIM][Cl], and [EMIM][AC], ionic liquid [EMIM][AC] was selected as extractant, and quantum chemical calculations based on COSMO‐SAC theory were carried out to analyze the mechanism of the separation process. An ethanol‐tert‐butanol‐water extractive distillation process was designed, optimized with the goal of the lowest total annual economic cost, and the cost of carbon dioxide emissions was calculated. To further save energy, a heat pump distillation process was designed and compared with the conventional ionic liquid process. The annual total cost of the heat pump distillation process is reduced by 10.11 %, and carbon dioxide emission costs are reduced by 61.9 %. Comparison with the conventional extractive distillation process and its modified process revealed economic advantages for the ionic liquid extractive distillation process and its heat pump version.

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Isobaric vapor–liquid equilibrium for methyl acetate + methanol with double salt ionic liquid [EMIM][Cl]0.5[DCA]0.5 as entrainer at 101.3 kPa

Xing

Cui

et al. 2021

Fluid Phase Equilibria

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Isobaric vapor-liquid equilibria for tert-butanol + water with single and mixed ionic liquids as solvents at 101.3 kPa

Cited by 8 publications

References 27 publications

Isobaric vapor–liquid equilibrium of tert‐butanol + water + ionic liquids at atmospheric pressure

Isobaric vapor–liquid equilibrium of tert‐butanol + water + ionic liquids at atmospheric pressure

Energy‐Saving Separation of the Ethanol‐tert‐Butanol‐Water Azeotrope System Based on an Ionic Liquid

Isobaric vapor–liquid equilibrium for methyl acetate + methanol with double salt ionic liquid [EMIM][Cl]0.5[DCA]0.5 as entrainer at 101.3 kPa

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