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本文报导了醋酸-水、醋酸-醋酸乙烯酯、水-醋酸乙烯酯等三对二元系以及醋酸-水-醋酸乙烯酯三元系在液相完全互溶区的气液平衡实验数据。文中还计算了经校正了醋酸气相缔合后的活度系数,作了热力学一致性校验,并尝试用NRTL式进行关联。当使用三对二元系的NRTL特征参数,对三元系液相完全互溶区的气液平衡进行了预测,与实验结果基本相符。三元系液相部分互溶区的实验数据与热力学关联的结果,将于第Ⅱ报中报导。
In this paper, the experimental data of the gas-liquid equilibrium of three pairs of binary systems such as acetic acid-water, acetic acid-vinyl acetate, water-vinyl acetate and acetic acid-water-vinyl acetate ternary system in the completely liquid- The article also calculates the activity coefficient after the association of acetic acid gas phase is calibrated, and makes thermodynamic consistency check, and attempts to correlate with NRTL formula. When NRTL characteristic parameters of three pairs of binary systems are used, the gas-liquid equilibrium of the ternary liquid phase completely miscible zone is predicted, which is in good agreement with the experimental results. The results of experimental data related to the thermodynamics of the ternary liquid-phase partial miscibility zone will be reported in Section II.