Vapor Liquid Equilibria for Ionic Liquid/Ethanol/Water Systems and the Effect of Anion Hydrolysis,Chemical Engineering & Technology

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Vapor Liquid Equilibria for Ionic Liquid/Ethanol/Water Systems and the Effect of Anion Hydrolysis
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-09-22 , DOI: 10.1002/ceat.202000114
Erfaneh Faghihi ₁ , Babak Mokhtarani ₁ , Hamid Reza Mortaheb ₁ , Kourosh Tabar Heydar ₁ , Mojtaba Mirzaei ₁ , Ali Sharifi ₁

Affiliation

The performance of two tetrafluoroborate‐based ionic liquids (ILs) as entrainers in the dehydration of water/ethanol azeotropic mixtures was evaluated. Isobaric vapor‐liquid equilibrium (VLE) data were measured for the systems ethanol/water/1‐butyl‐3‐methyl imidazolium tetrafluoroborate and ethanol/water /n‐butylpyridinium tetrafluoroborate including the azeotropic region. VLE data for the ethanol/water, ethanol/IL, and water/IL binary mixtures were obtained at 100 kPa. The hydrolysis of the tetrafluoroborate anion was studied for both types of ILs by ¹⁹F NMR analysis. The hydrolysis of the tetrafluoroborate anion does not have much effect on the ethanol/water VLE. The ¹⁹F NMR analysis indicated that hydrolysis occurred at high mole fractions of water.

中文翻译：

离子液体/乙醇/水系统的汽液平衡及阴离子水解的影响

评估了两种基于四氟硼酸盐的离子液体（IL）作为夹带剂在水/乙醇共沸混合物脱水中的性能。测量了乙醇/水/ 1-丁基-3-甲基咪唑四氟硼酸盐和乙醇/水/正丁基吡啶四氟硼酸盐（包括共沸区）系统的等压汽液平衡（VLE）数据。乙醇/水，乙醇/ IL和水/ IL二元混合物的VLE数据在100 kPa下获得。通过¹⁹ F NMR分析研究了两种类型的IL的四氟硼酸根阴离子的水解。四氟硼酸根阴离子的水解对乙醇/水VLE的影响不大。的^19点F NMR分析表明，水解发生在水高摩尔分数。

更新日期：2020-10-20

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