Abstract Isobaric vapour-liquid equilibrium data of {dimethyl succinate (DMS) + dimethyl glutarate (DMG) + dimethyl adipate (DMA)} ternary system was measured at 2 kPa, 5 kPa and 8 kPa with a dynamic recirculating apparatus and the temperature ranged from 364.46 to 403.55 K. The experimental data was correlated with NRTL, Wilson and Uniquac models. The results showed that the maximum value of the root mean square deviation of the vapour phase mole fraction of the ternary system correlated by the three models is 0.0083, 0.0076 and 0.0084, respectively. The vapour-liquid equilibrium data of the ternary system was predicted by the interaction parameters of NRTL, Wilson and the Uniquac models in the literature. The results showed that the maximum value of the root mean square deviation of the vapour phase mole fraction of the ternary system predicted by the three models is 0.0547, 0.0471, and 0.0498, respectively. The deviation between the experimental value and the regression value or the predicted value was small, and both met the needs of design calculation of the engineering separation. The results obtained from the regression of experimental values are significantly better.

中文翻译：

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(丁二酸二甲酯+戊二酸二甲酯+己二酸二甲酯)在2、5和8kPa下三元等压气液平衡数据的测定和关联

摘要 {琥珀酸二甲酯 (DMS) + 戊二酸二甲酯 (DMG) + 己二酸二甲酯 (DMA)} 三元体系的等压气液平衡数据是在 2 kPa、5 kPa 和 8 kPa 下用动态循环装置测量的，温度范围为364.46 到 403.55 K。实验数据与 NRTL、Wilson 和 Uniquac 模型相关。结果表明，三种模型关联的三元体系气相摩尔分数的均方根偏差最大值分别为0.0083、0.0076和0.0084。三元系统的气液平衡数据由文献中NRTL、Wilson和Uniquac模型的相互作用参数预测。结果表明，三种模型预测的三元体系气相摩尔分数的均方根偏差最大值分别为0.0547、0.0471和0.0498。实验值与回归值或预测值的偏差较小，均满足工程分离设计计算的需要。从实验值回归得到的结果明显更好。