Liquid-liquid equilibrium data for the systems {LTTM + benzene + hexane} and {LTTM + ethyl acetate + hexane} at different temperatures and atmospheric pressure

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• 作者：Agustin S.B. Gonzalez ; Mar铆a Francisco ; Guillermo Jimeno ; Sara Lago Garc铆a de Dios ; Maaike C. Kroon
• 关键词：Low transition temperature mixtures ; Deep eutectic solvents ; Ionic liquids ; Liquid&ndash ; liquid equilibrium data ; Aromatic separation
• 刊名：Fluid Phase Equilibria
• 出版年：25 December, 2013
• 年：2013
• 卷：360
• 期：Complete
• 页码：54-62
• 全文大小：1192 K

文摘

Low transition temperature mixtures (LTTMs), which are ionic liquid analogues, are evaluated in this work as extractant solvents for the separation of benzene from hexane (aromatic/aliphatic mixture) and ethyl acetate from hexane, which are both azeotropic systems. Experimental data for liquid-liquid equilibria were obtained at 25, 35 and 45 掳C. LTTMs showed much higher selectivities but lower distribution ratios compared to the solvent that is currently used in industry. The phase diagrams of the ternary systems composed of LTTM + benzene + hexane and LTTM + ethyl acetate + hexane are shown and the experimental data were correlated by using the UNIQUAC model. LTTMs are compared with other reported ionic liquids (ILs) and deep eutectic solvents (DES) as well as sulfolane in order to evaluate their ability to separate azeotropic mixtures through liquid-liquid extraction (LLE).