Isobaric vapor–liquid equilibrium (VLE) data for the binary system acetamide + N,N-dimethyl formamide (DMF) and the quaternary system sec-butyl alcohol (SBA) + sec-butyl acetate (SBAC) + acetamide + DMF were measured at 101.3 kPa. The VLE data were verified to be thermodynamically consistent by the Fredenslund test and Wisniak’s L–W test. In addition, the binary interaction parameters of UNIQUAC, Wilson, and NRTL models for DMF–acetamide were obtained by correlating the binary VLE data. UNIQUAC, Wilson, NRTL, and COSMO-UNIFAC models were employed to predict the VLE data, and the results were compared with the experimental results. Compared with the result without entrainers, the effect of mixed solvent acetamide + DMF (the mass ratio of acetamide to DMF is 1:1) can enhance the relative volatility of SBAC to SBA obviously.

中文翻译：

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二元体系乙酰胺 + N,N-二甲基甲酰胺和四元体系仲丁醇 + 乙酸仲丁酯 + 乙酰胺 + N,N-二甲基甲酰胺在 101.3 kPa 时的等压汽液平衡数据

二元体系乙酰胺 + N,N-二甲基甲酰胺 (DMF) 和四元体系仲丁醇 (SBA) +乙酸仲丁酯 (SBAC) + 乙酰胺 + DMF 的等压气液平衡 (VLE) 数据在101.3 千帕。通过 Fredenslund 测试和 Wisniak 的L-W验证 VLE 数据在热力学上是一致的测试。此外，通过关联二元 VLE 数据，获得了 DMF-乙酰胺的 UNIQUAC、Wilson 和 NRTL 模型的二元相互作用参数。采用UNIQUAC、Wilson、NRTL和COSMO-UNIFAC模型对VLE数据进行预测，并将结果与​​实验结果进行比较。与不含共沸剂的结果相比，混合溶剂乙酰胺+DMF（乙酰胺与DMF的质量比为1:1）的效果可以明显提高SBAC与SBA的相对挥发度。