Abstract

Liquid − liquid equilibrium (LLE) data for the water + 2,3-butanediol (2,3-BD) + solvent (n-hexanol or iso-pentanol) ternary systems were obtained at different temperatures (298.2, 308.2, and 318.2 K) under 101.3 kPa. Distribution coefficients and separation factors were calculated accordingly. Distribution coefficients and separation factors were greater than 0.2 and 2.5, respectively, for both n-hexanol and iso-pentanol, which indicated that they were feasible to extract 2,3-BD from aqueous solution. Meanwhile, the reliability of the experimental LLE data was confirmed by both Othmer − Tobias equation and Hand equation. Lastly, the LLE data were correlated by both thermodynamic nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) models, and their binary interaction parameters were correlated from the data. In addition, topological analysis related to the Gibbs minor common tangent test was applied to validate the binary interaction parameters.

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摘要

在不同温度（298.2、308.2 和 318.2 K）下获得水 + 2,3-丁二醇 (2,3-BD) + 溶剂（正己醇或异戊醇）三元体系的液 - 液平衡 (LLE) 数据) 低于 101.3 kPa。相应地计算分配系数和分离因子。正己醇和异戊醇的分配系数和分离因子分别大于0.2和2.5，表明从水溶液中提取2,3-BD是可行的。同时，实验 LLE 数据的可靠性得到了 Othmer - Tobias 方程和 Hand 方程的证实。最后，通过热力学非随机双液体 (NRTL) 和通用准化学 (UNIQUAC) 模型对 LLE 数据进行关联，并将它们的二元相互作用参数与数据关联。此外，

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