Isobaric Vapor−Liquid Equilibrium for Ethyl Acetate + Ethanol + 1-Ethyl-3-methylimidazolium Tetrafluoroborate

• Published in: Journal of chemical and engineering data Vol. 54; no. 2; pp. 193 - 197
• Main Authors: Li, Qunsheng, Zhang, Jiguo, Lei, Zhigang, Zhu, Jiujuan, Xing, Fengying
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 12.02.2009
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Liquid-vapor equilibria; Phase equilibria; Ternary system; Extractive distillation; Ethanol; Isobar; Liquid vapor equilibrium; Alcohol; Phase equilibrium; Ionic liquid; Interaction parameter
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je800175s

Isobaric vapor−liquid equilibrium (VLE) data for ethyl acetate (1) + ethanol (2) containing ionic liquid (IL) 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM]+[BF4]−) (3) at atmospheric pressure (101.32 kPa) were measured with a modified Othmer still. It was observed that the VLE data containing the IL were obviously different from that of the IL-free system. The IL investigated showed a notable salting-out effect, which enhanced the relative volatility of ethyl acetate to ethanol and gave rise to the elimination of the azeotropic point at a specific IL mole fraction. It was found that the salting-out effect followed the order of x 3 = 0.30 > x 3 = 0.20 > x 3 = 0.07. The measured ternary data were correlated using the NRTL model.