(Solid + liquid) and (liquid + liquid) phase equilibria study and correlation of the binary systems {N-butyl-3-methylpyridinium tosylate + water, or + an alcohol, or + a hydrocarbon}

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• 作者：Trevor M. Letcher ; Deresh Ramjugernath ; Kaniki Tumba ; Marek Kr&#xf3 ; likowski ; Urszula Domań ; ska
• 关键词：Ionic liquid ; [BM³Py][TOS] ; Solid + liquid equilibrium ; Liquid + liquid equilibrium ; Correlation ; NRTL equation
• 刊名：Fluid Phase Equilibria
• 出版年：2010
• 出版时间：15 July 2010
• 年：2010
• 卷：294
• 期：1-2
• 页码：89-97
• 全文大小：440 K

文摘

The ionic liquid N-butyl-3-methylpyridinium tosylate ([BM³Py][TOS]) has been synthesized from β-picoline as a substrate. The work includes the characterization of the synthesized compound by elemental analysis, ¹H NMR and ¹³C NMR spectra, water content, and by the differential scanning calorimetry. Phase diagrams for the binary systems {[BM³Py][TOS] + water, or + an alcohol (1-butanol, 1-hexanol, 1-octanol, 1-decanol), or + an alkane (n-hexane, n-heptane, n-octane), or + an aromatic hydrocarbons (benzene, toluene, ethylbenzene, n-propylbenzene)} have been determined at atmospheric pressure using a dynamic method. (Solid + liquid) phase equilibria with complete miscibility in the liquid phase region were observed for the systems involving water and the alcohols. The phase equilibria (solid, or liquid + liquid) for the binary systems containing a hydrocarbon reported here exhibit an upper critical solution temperature. The reduction of experimental data has been carried out using the non-random two liquid (NRTL) correlation equation. The phase diagrams reported here have been compared with analogous phase diagrams reported previously for systems containing the ionic liquid, N-butyl-4-methylpyridinium tosylate and other pyridinium-based ionic liquids. The influence of the asymmetry of the cation on the phase behaviour has been discussed.