Vapor-Liquid Equilibrium for Acetonitrile plus Ethanol with Imidazole-Based Ionic Liquids as Entrainers at 101.3 kPa

被引：2

作者：

Yue, Kun ^{[1
]}

Lu, Jiani ^{[1
]}

Chen, Peiyu ^{[1
]}

Gu, Shaonan ^{[1
]}

Zhou, Guowei ^{[1
]}

机构：

[1] Qilu Univ Technol, Shandong Acad Sci, Key Lab Fine Chem Univ Shandong, Sch Chem & Chem Engn,Jinan Engn Lab Multiscale Fun, Jinan 250353, Peoples R China

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2024年 / 69卷 / 04期

基金：

中国国家自然科学基金;

关键词：

ISOBARIC VAPOR; ETHYL-ACETATE; DIMETHYL CARBONATE; SEPARATION; OPTIMIZATION; BEHAVIOR;

D O I：

10.1021/acs.jced.3c00752

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Vapor-liquid equilibrium (VLE) data for the ternary system of acetonitrile + ethanol + ionic liquids (ILs) were obtained at 101.3 kPa, and used ILs were 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][NTf2]), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf2]), and 1-butyl-3-methylimidazolium diethylphosphate ([BMIM][DEP]). The nonrandom two-liquid (NRTL) model was used to correlate the VLE data and fitted well, indicating that the minimum mole fractions of [BMIM][NTf2], [EMIM][NTf2], and [BMIM][DEP] to eliminate the azeotrope was 0.053, 0.063, and 0.065, respectively. These ILs led to an outstanding "salting-in" effect on ethanol, and the salting effect on acetonitrile was inapparent. Higher concentrations of ILs signified a stronger salt effect as well as higher equilibrium temperatures. The results indicated that [BMIM][NTf2], [EMIM][NTf2], and [BMIM][DEP] could be used as good candidate entrainers to separate acetonitrile and ethanol in extractive distillation.

引用

页码：1645 / 1654

页数：10

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