In this paper, liquid–liquid phase equilibrium data were measured for quaternary systems containing dimethyl sulfoxide + mass fraction of methanol as mixed solvent, toluene as aromatic hydrocarbon and heptane as fuel model at 298.15 K under ambient pressure. The selectivity and the distribution coefficient calculated from the experimental data were used to examine the possibility of adding methanol to dimethyl sulfoxide for extraction of toluene from heptane. Liquid samples were characterized by gas chromatography. The reliability of the experimental LLE data were examined by Othmer–Tobias and Hand methods. The non-random two-liquid model was used to correlate experimental data and fitting parameters were reported.

在本文中，在环境压力下，在 298.15 K 下测量了含有二甲基亚砜 + 质量分数的甲醇作为混合溶剂，甲苯作为芳烃和庚烷作为燃料模型的四元体系的液 - 液相平衡数据。根据实验数据计算的选择性和分配系数用于检验将甲醇添加到二甲亚砜中以从庚烷中萃取甲苯的可能性。液体样品用气相色谱法表征。通过 Othmer-Tobias 和 Hand 方法检查了实验 LLE 数据的可靠性。非随机两液体模型用于关联实验数据并报告拟合参数。