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首页> 外文期刊>Fluid Phase Equilibria >Separation of propylbenzene and n-alkanes from their mixtures using 4-methyl-N-butylpyridinium tetrafluoroborate as an ionic solvent at several temperatures
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Separation of propylbenzene and n-alkanes from their mixtures using 4-methyl-N-butylpyridinium tetrafluoroborate as an ionic solvent at several temperatures

机译：使用4-甲基-N-丁基四氟硼酸吡啶盐作为离子溶剂，在几个温度下从混合物中分离出丙苯和正烷烃

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摘要

Liquid-liquid extraction is the most common method for separation of aromatics from their mixtures with n-alkanes hydrocarbons. An ionic liquid (IL), 4-methyl-N-butylpyridinium tetrafluoroborate [(mebupy)(BF_4)], was evaluated as solvent for this separation. Liquid equilibria (LLE) for 2 ternary systems comprising tetradecane, or hexadecane+propylbenzene+[(mebupy)(BF_4)] were measured over a temperature range of 313-333K and atmospheric pressure. The reliability of the experimental data was evaluated using the Othmer-Tobias correlation. The effect of temperature, n-alkane chain length and solvent to feed ratio upon solubility, selectivity, and distribution coefficient were investigated experimentally. In addition, the experimental results were regressed to estimate the interaction parameters between each of the 3 pairs of components for the UNIQUAC and the NRTL models as a function of temperature. Both models satisfactorily correlate the experimental data, however the UNIQUAC fit was slightly better than that obtained with the NRTL model.
机译：液-液萃取是从芳烃与正构烷烃的混合物中分离芳烃的最常用方法。评价离子液体（IL），即四氟硼酸4-甲基-N-丁基吡啶鎓[（mebupy）（BF_4）]作为该分离的溶剂。在313-333K的温度范围和大气压下，测量了包含十四烷或十六烷+丙基苯+ [（甲基）（BF_4）]的两个三元体系的液体平衡（LLE）。使用Othmer-Tobias相关性评估了实验数据的可靠性。实验研究了温度，正构烷烃链长和溶剂进料比对溶解度，选择性和分布系数的影响。此外，还对实验结果进行了回归，以估计UNIQUAC模型和NRTL模型的3对组件之间的相互作用参数随温度的变化。两种模型都令人满意地关联了实验数据，但是UNIQUAC拟合比用NRTL模型获得的拟合稍好。

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