| Summary: | 碩士 === 明新科技大學 === 化學工程與材料科技研究所 === 100 === The objective of this study is to investigate the effects on the liquid-liquid phase
equilibrium (LLE) behavior for replacement of traditional solvents in the separation of
aromatic and aliphatic compounds by ionic liquids. Liquid-liquid equilibrium (LLE) data were measured for the ternary mixtures of ionic liquids (1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [EMIM+][NTf2-], 1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [BMIM+][NTf2-], 1-methyl-3-octylimidazolium bis(trifluoromethylsulfonyl)imide, [OMIM+][NTf2-]) + aliphatic compounds (n-Hexane, n-Heptane, n-Octane) + aromatic compound (Toluene) at temperatures 283.15 K and 313.15 K under atmospheric pressure through the use of the cloud point methods. All the investigated ternary systems behave as Type II of LLE. In the heptane mixture system, the areas of two-liquid-phase region increase with increasing temperature for the ternary system. In the hexane and octane mixture systems, the areas of two-liquid-phase region decrease with increasing temperature for the ternary system. To apply these ionic liquids in the chemical separation process, phase equilibrium data are very important. From those data, we will be able to obtain the information of the extractive efficiency of ionic liquid extractants and to establish the new extractive separation technology of aromatic and aliphatic mixtures.
Keywords：liquid-liquid equilibrium, ionic liquid, aromatic compounds , aliphatic compounds cloud-point method.
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