For some strongly non-ideal solution systems, there are often errors in predicting the phase equilibrium relationship of a multi-component system using the interaction parameters obtained by the regression of the phase equilibrium data of the binary system. The interaction parameters between the components obtained by directly determining the phase equilibrium of the multivariate system will bring the calculated values closer to the experimental values. Liquid–liquid equilibrium (LLE) data were determined for the system of n-butanol + n-pentanol + n-hexanol + water at 313.15, 323.15, and 333.15K under atmospheric pressure. LLE compositions were determined by gas chromatography. LLE data were correlated by the UNIQUAC model and the non-random two-liquid (NRTL) model. Both models were appropriate for describing the LLE of this quaternary equilibrium system. They provided accurate thermodynamic parameters for the phase equilibrium of C_4–6 mixed alcohols in Fischer–Tropsch synthesis water.

中文翻译：

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在 313.15、323.15 和 333.15 K 下四元体系 N-丁醇 + N-戊醇 + N-己醇 + 水的液-液平衡测量和相关性

对于一些强非理想解系统，利用二元系统相平衡数据回归得到的相互作用参数来预测多组分系统的相平衡关系往往会出现误差。通过直接确定多元系统的相平衡得到的组分之间的相互作用参数将使计算值更接近实验值。确定正丁醇 +正戊醇 + n体系的液-液平衡 (LLE) 数据-己醇 + 水在大气压下 313.15、323.15 和 333.15K。LLE 组成通过气相色谱法测定。LLE 数据通过 UNIQUAC 模型和非随机二液 (NRTL) 模型进行关联。这两种模型都适用于描述这种四元平衡系统的 LLE。他们为费托合成水中的 C _4-6混合醇的相平衡提供了准确的热力学参数。