Isobaric binary vapor–liquid equilibrium (VLE) data for ethylbenzene + ethyl benzoate, o-xylene + ethyl benzoate, m-xylene + ethyl benzoate, and p-xylene + ethyl benzoate, as well as the quinary VLE data for ethyl benzoate + o-xylene + m-xylene + p-xylene + ethylbenzene, were measured at 101.33 kPa using a modified Rose still. The thermodynamic consistency test was implemented by using the Herington method. Moreover, the VLE data for ethyl benzoate + o-xylene, ethyl benzoate + m-xylene, ethyl benzoate + p-xylene, and ethyl benzoate + ethylbenzene were correlated using the nonrandom two-liquid (NRTL) and universal quasichemical activity coefficient (UNIQUAC) models using the nonlinear least-square method. The obtained NRTL and UNIQUAC model parameters of the binary systems were utilized to predict the VLE data for the quinary system. It was shown that all the models showed a relatively small deviation from the experimental results, and the quinary predicted values obtained in this way agreed well with the experimental values, indicating that the experimental data were suitable for designing the extractive distillation process of ethyl benzoate with ethylbenzene and xylene isomers.

中文翻译：

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苯甲酸乙酯与二甲苯异构体和乙苯二元体系的等压汽液平衡研究

乙苯 + 苯甲酸乙酯、邻二甲苯 + 苯甲酸乙酯、间二甲苯 + 苯甲酸乙酯和对二甲苯 + 苯甲酸乙酯的等压二元气液平衡 (VLE) 数据，以及苯甲酸乙酯 + o的五元 VLE 数据对二甲苯 +间二甲苯 +对二甲苯 + 乙苯，使用改进的 Rose 蒸馏器在 101.33 kPa 下测量。采用 Herington 方法进行热力学一致性检验。此外，苯甲酸乙酯 +邻二甲苯、苯甲酸乙酯 +间二甲苯、苯甲酸乙酯 + p的 VLE 数据-二甲苯和苯甲酸乙酯 + 乙苯使用非线性最小二乘法的非随机二液体 (NRTL) 和通用准化学活性系数 (UNIQUAC) 模型进行关联。获得的二元系统的NRTL和UNIQUAC模型参数用于预测五元系统的VLE数据。结果表明，所有模型与实验结果的偏差较小，由此得到的五元预测值与实验值吻合较好，说明实验数据适用于苯甲酸乙酯萃取精馏工艺的设计。乙苯和二甲苯异构体。