Isobaric Vapor–Liquid Equilibria for Ethyl Acetate + Methanol + Ionic Liquids Ternary Systems at 101.3 kPa

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• 作者：Zhigang Zhang ; Fenjin Pan ; Qinqin Zhang ; Tao Zhang ; Lin Zhang ; Kaifang Wu ; Wenxiu Li
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：February 11, 2016
• 年：2016
• 卷：61
• 期：2
• 页码：772-779
• 全文大小：416K
• ISSN：1520-5134

文摘

Isobaric vapor–liquid equilibrium (VLE) data for the ethyl acetate + methanol +1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]) and ethyl acetate + methanol +1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][DBP]) ternary systems were measured at 101.3 kPa with an improved all-glass single-cycle still. They were correlated with the nonrandom two-liquid (NRTL) model and were in good agreement with the correlated data. The results showed that the two ionic liquids (ILs) produced an obvious effect on the VLE behavior. With the addition of them into the azeotropic system, the relative volatility of ethyl acetate to methanol was enhanced. Moreover, the azeotropic point was eliminated as the mole fractions of [EMIM][DEP] and [BMIM][DBP] in the liquid phase were equal to 0.05 and 0.1, respectively. As for salting-out effect on ethyl acetate, [EMIM][DEP] outperforms [BMIM][DBP].