Isobaric vapor-liquid equilibrium for system of acetonitrile-n-propanol system containing ionic liquids

doi:10.11949/j.issn.0438-1157.20141907

Abstract

Abstract: Isobaric vapor liquid equilibrium (VLE) for the acetonitrile-n-propanol system containing different ionic liquids (ILs) at atmospheric pressure (101.3 kPa) was measured. The employed ionic liquids (ILs) are 1-benzyl-3-methylimidazolium chloride ([BzMIM][Cl]), 1-benzyl-3-methylimidazolium bromide ([BzMIM][Br]) and 1-hexyl-3-methylimidazolium bromide ([HMIM][Br]). The results showed that all the three ILs could enhance the relative volatility of acetonitrile to n-propanol. The order of the separation ability of ILs is [BzMIM][Cl] > [BzMIM][Br] > [HMIM][Br]. The ternary vapor liquid equilibrium experimental data were fitted with the nonrandom two-liquid (NRTL) model. It was demonstrated that NRTL model was suitable for the description of the ternary system of acetonitrile + n-propanol + IL.

Key words: ionic liquid, acetonitrile, n-propanol, relative volatility, vapor-liquid equilibrium

摘要： 常压(101.3 kPa)下, 测定了如下体系的汽液平衡数据:乙腈-正丙醇-氯化1-苄基-3-甲基咪唑([BzMIM][Cl])、乙腈-正丙醇-溴化1-苄基-3-甲基咪唑([BzMIM][Br])、乙腈-正丙醇-溴化1-己基-3-甲基咪唑([HMIM][Br]), 考察了3种离子液体对乙腈-正丙醇体系相平衡行为的影响。实验结果表明, 3种离子液体都能够提高乙腈对正丙醇的相对挥发度, 3种离子液体提高相对挥发度的顺序为 [BzMIM][Cl] > [BzMIM][Br] > [HMIM][Br]。用NRTL模型对测得的汽液平衡数据进行了关联, 关联结果与实验结果具有良好的一致性。

关键词: 离子液体, 乙腈, 正丙醇, 相对挥发度, 汽液平衡

CLC Number:

O642.42

LI Wenxiu, ZHANG Qi, ZHANG Qinqin, ZHANG Zhigang. Isobaric vapor-liquid equilibrium for system of acetonitrile-n-propanol system containing ionic liquids[J]. , 2015, 66(S1): 38-44.

李文秀, 张琦, 张亲亲, 张志刚. 含离子液体乙腈-正丙醇体系的等压汽液平衡[J]. CIESC Journal, 2015, 66(S1): 38-44.

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