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Vapor-liquid and liquid-liquid equilibrium for binary systems ester + a new protic ionic liquid

机译：二元体系酯的汽-液和液-液平衡+新型质子离子液体

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摘要

This study reports the synthesis of a new protic ionic liquid, bis(2-hydroxyethyl)ammonium butyrate (2-HE2AB), performed by a Bransted acid-base reaction between butanoic acid and bis(2-hydroxyethyl)ammonia. The new ionic liquid was characterized by ID hydrogen NMR spectrum. The ionic liquid shows complete solubility in water, methanol, and ethanol, and is partially soluble in methyl acetate, ethyl acetate, and propyl acetate, while it is not soluble in some alkanes. Density, refractive index, and vapor-liquid equilibrium were measured for the binary system 2-HE2AB + methyl acetate at atmospheric pressure. Furthermore, density, refractive index, and liquid-liquid equilibrium were measured for the binary systems 2-HE2AB + ester (methyl acetate, ethyl acetate, or propyl acetate) at 293.2 K. The Peng-Robinson equation of state, coupled with the Wong-Sandier mixing rule, was used in the thermodynamic modeling of density, vapor-liquid, and liquid-liquid equilibrium data. The COSMO-SAC activity coefficient model was used to calculate the activity coefficient within the Wong-Sandier mixing rule. The calculations show deviations for density, for the vapor-liquid equilibrium, and for the non-polar and polar phases of the liquid-liquid equilibrium within 13.0, 0.1,132.5, and 23.8 %, respectively.
机译：这项研究报告了一种新的质子离子液体，双（2-羟乙基）丁酸铵（2-HE2AB）的合成，该反应是通过丁酸和双（2-羟乙基）氨之间的布朗斯台德酸碱反应进行的。新型离子液体通过1D氢NMR光谱进行表征。离子液体在水，甲醇和乙醇中显示出完全溶解性，并且部分溶于乙酸甲酯，乙酸乙酯和乙酸丙酯，但不溶于某些烷烃。在大气压下测量了二元体系2-HE2AB +乙酸甲酯的密度，折射率和气液平衡。此外，在293.2 K下测量了二元体系2-HE2AB +酯（乙酸甲酯，乙酸乙酯或乙酸丙酯）的密度，折射率和液液平衡。Peng-Robinson状态方程与Wong耦合-Sandier混合法则用于密度，汽-液和​​液-液平衡数据的热力学建模。 COSMO-SAC活度系数模型用于计算Wong-Sandier混合规则内的活度系数。计算显示出密度，气液平衡以及液-液平衡的非极性和极性相的偏差分别在13.0％，0.1、132.5和23.8％之内。

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