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Extraction of organic compounds involved in the kinetic resolution of rac-2-pentanol from n-hexane by imidazolium-based ionic liquids: Liquid-liquid equilibrium
Journal of Molecular Liquids ( IF 6 ) Pub Date : 2018-01-04 , DOI: 10.1016/j.molliq.2017.12.157
Mercedes G. Montalbán , Mar Collado-González , A. Abel Lozano-Pérez , F. Guillermo Díaz Baños , Gloria Víllora

This paper focuses on the use of ionic liquids (1-butyl-3-methylimidazolium methylsulphate, [bmim+][MeSO4], and 1-ethyl-3-methylimidazolium acetate, [emim+][Ac]) to extract organic compounds involved in the racemic resolution of rac-2-pentanol (rac-2-pentanol, vinyl butyrate, rac-2-pentyl butyrate or butyric acid) from a mixture of one of these organic compounds with n-hexane. Liquid–liquid equilibrium data were experimentally obtained for seven ternary systems comprising an ionic liquid + rac-2-pentanol, vinyl butyrate, rac-2-pentyl butyrate or butyric acid + n-hexane at T = 303.15 K and atmospheric pressure. Binodal curves were measured applying the well-known procedure based on the observance of the cloud point while the compositions of the tie lines were calculated from refractive index and density measurements (the phase rich in the ionic liquid) and by gas cromatography (the phase rich in n-hexane). Selectivity values and the solute distribution ratio were utilized to test the possibility of the use of these ionic liquids as extractive solvents of the organic compounds implicated in the kinetic separation of the R- and S-enantiomers of rac-2-pentanol. The liquid-liquid equilibrium data of the ternary systems examined here have not previously been described in the literature.



中文翻译:

涉及外消旋-2-戊醇的动力学拆分从有机化合物的萃取Ñ由咪唑鎓基的离子液体-己烷:液-液平衡

本文的重点是使用离子液体(1-丁基-3-甲基咪唑鎓甲基硫酸盐,[BMIM + ] [内消旋4 - ],1-乙基-3-甲基咪唑乙酸盐,[EMIM + ] [AC - ])来提取涉及的外消旋拆分的有机化合物外消旋-2-戊醇(外消旋-2-戊醇,丁酸乙烯酯,外消旋-2-戊酯或丁酸)从与这些有机化合物的一种的混合物ñ正己烷。通过实验获得了包含离子液体+ rac -2-戊醇,丁酸乙烯酯,rac -2-戊基丁酸或丁酸+的 七个三元体系的液-液平衡数据 Ñ己烷在Ť  = 303.15 K和大气压力。根据浊点的观测,使用众所周知的程序测量双曲线,而根据折射率和密度测量值(离子液体中的相丰富)和气相色谱法(相位丰富的)计算连接线的组成在ñ己烷)。利用选择性值和溶质分布比来测试将这些离子液体用作有机化合物的萃取溶剂的可能性,这涉及racR-S-对映异构体的动力学分离。-2-戊醇。本文中所研究的三元体系的液-液平衡数据以前没有在文献中描述。

更新日期:2018-01-04
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