Influence of salt added to solvent on extractive distillation

Lei, Zhigang; Wang, Hongyou; Zhou, Ri-Gui; Duan, Zhanting

doi:10.1016/s1385-8947(01)00211-x

Cited by 91 publications

(50 citation statements)

References 11 publications

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“…Besides many other applications, this solvent is used as entrainer for the separation of waterethanol mixtures by means of extractive distillation [3][4][5][6][7][8][9]. To design or simulate this process, sound knowledge of the physical and transport properties of this ternary mixture is important.…”

Section: Introductionmentioning

confidence: 99%

Viscosity and density data for the ternary system water(1)–ethanol(2)–ethylene glycol(3) between 298.15K and 328.15K

Quijada‐Maldonado

Meindersma

Haan

2013

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Viscosity and density data for the ternary system water(1)–ethanol(2)–ethylene glycol(3) between 298.15K and 328.15K

Quijada‐Maldonado

Meindersma

Haan

2013

The Journal of Chemical Thermodynamics

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“…In this case, ethanol and water were varied over the whole composition range while the composition of solvent was kept constant. Figure 2 shows the pseudo-binary vaporliquid equilibrium curve for the ethanol-waterethylene glycol system which is generated by the simulator with the NRTL thermodynamic model, together with the experimental data reported by Lee and Pahl (1985), Lei et al (2002), and Ramanujam and Laddha (1960). Likewise, Figure 3 shows equivalent results for the ethanol-water-glycerol system, together with the experimental values reported by Lee and Pahl (1985).…”

Section: Thermodynamic Modelmentioning

confidence: 97%

Simulation of ethanol extractive distillation with mixed glycols as separating agent

Gil

García

Rodríguez

2014

Braz. J. Chem. Eng.

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-Extractive distillation is an alternative for ethanol dehydration processes that has been shown to be more effective than azeotropic distillation and, in close proximity, to be very competitive against the process that uses adsorption with molecular sieves. Glycols have been shown to be the most effective solvents in extractive distillation, mainly ethylene glycol and glycerol. In this work, an extractive distillation column was simulated with the Aspen Plus software platform, using the RadFrac module for distillation columns, to investigate the effect on the separation of the ethylene glycol-glycerol mixture composition, the separating agent feed stages, the separating agent split stream feed, and the azeotropic feed temperature. The NRTL model was used to calculate the phase equilibrium of these strongly polar mixtures. A rigorous simulation of the extractive distillation column finally established was also performed, including a secondary recovery column for the mixture of solvents and a recycle loop, to simulate an industrially relevant situation. This simulation allowed establishing the complete parameters to dehydrate ethanol: the optimal stage for separating agent feed is stage 4; the most adequate composition for the glycols mixture is 60 mol% ethylene glycol and 40 mol% glycerol. Finally, energetically efficient operating conditions for each one of the columns were established through a preliminary pinch analysis.

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“…Extractive distillation is the most widely utilized technology to separate azeotropic or close-boiling point mixtures [1][2][3]. The selection of a suitable entrainer is of great importance before the separationprocess is designed [4,5].…”

Section: Introductionmentioning

confidence: 99%

Isobaric vapor–liquid equilibrium for methyl acetate+methanol system containing different ionic liquids at 101.3kPa

Zhang

et al. 2016

Fluid Phase Equilibria

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A B S T R A C TIsobaric vapor-liquid equilibrium (VLE) data for ternary systems of methyl acetate + methanol containing three ionic liquids (ILs) were measured at 101.3 kPa. The investigated ILs were 1-hexyl-3-methylimidazolium chloride ([HMIM][Cl]), 1-benzyl-3-methylimidazolium chloride ([BzMIM][Cl]), and 1-hexyl-3-methylimidazolium bromide ([HMIM][Br]). The results indicate that the addition of ILs can give rise to the increase of the relative volatility of methyl acetate to methanol. Besides, the more ILs, the larger the relative volatility. All the three investigated ILs can eliminate the azeotropic point of methyl acetate and methanol, and the separation effect follows the order: [HMIM][Cl] > [BzMIM][Cl] > [HMIM] [Br]. Additionally, the measured VLE data are well correlated with NRTL model.

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Influence of salt added to solvent on extractive distillation

Cited by 91 publications

References 11 publications

Viscosity and density data for the ternary system water(1)–ethanol(2)–ethylene glycol(3) between 298.15K and 328.15K

Viscosity and density data for the ternary system water(1)–ethanol(2)–ethylene glycol(3) between 298.15K and 328.15K

Simulation of ethanol extractive distillation with mixed glycols as separating agent

Isobaric vapor–liquid equilibrium for methyl acetate+methanol system containing different ionic liquids at 101.3kPa

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