A suitable green solvent for extraction of aromatics from aliphatics must possess good solvation and physicochemical properties, a rare occurrence in a single deep eutectic solvent (DES). Mixture of DESs could enable synergy and provide a good candidate extractant. In this study, DESs of glyceline, ethaline, and reline were synthesized and their binary mixtures (glyceline/ethaline, reline/ethaline, and glyceline/reline) produced by blending in various volume proportions. Twelve of such mixed solvents were prepared and their extraction efficiency for separating benzene from n-hexane investigated in a batch equilibrium process. Liquid–liquid equilibria (LLE) data for the pseudo-ternary systems of n-hexane + benzene + mixed DESs were measured at 303 K and 101.3 kPa. The distribution coefficient (D) and selectivity (S) of each pseudo-ternary system were determined to elicit extraction efficiency. The physicochemical properties of the mixed DESs were also measured. The results show that generally the distribution coefficients, selectivities, and physicochemical properties of the mixed DESs lie between the corresponding values for the constituent DES. The best performance was given by the mixed solvent of glyceline and ethaline in the 80:20 volume ratio, respectively, with D = 0.75 and S = 422.485. This assertion was further corroborated by higher percent recovery of benzene obtained from the said mixed DES (57.88%) relative to other mixed DESs (≤ 49.11%) examined in this study. Furthermore, its separation efficiency is superior to sulfolane but lower than glyceline, though there was a 9.4% reduction in its viscosity relative to glyceline.

用于从脂肪族化合物中萃取芳香族化合物的合适绿色溶剂必须具有良好的溶剂化和物理化学性质，这在单一低共熔溶剂（DES）中很少出现。 DES 的混合物可以实现协同作用并提供良好的候选萃取剂。在本研究中，合成了甘油、乙醇乙胺和瑞林的DES，并通过以不同体积比例混合制备了它们的二元混合物（甘油/乙醇乙胺、瑞林/乙胺和甘油/雷林）。制备了十二种这样的混合溶剂，并在间歇平衡过程中研究了它们从正己烷中分离苯的萃取效率。在 303 K 和 101.3 kPa 下测量了正己烷 + 苯 + 混合 DES伪三元系统的液-液平衡 (LLE) 数据。确定每个伪三元系统的分配系数（D）和选择性（S ）以得出萃取效率。还测量了混合 DES 的物理化学性质。结果表明，混合 DES 的分配系数、选择性和物理化学性质通常位于成分 DES 的相应值之间。甘油和乙醇体积比分别为 80:20 的混合溶剂的性能最佳，D  = 0.75，S  = 422.485。相对于本研究中检查的其他混合 DES (≤ 49.11%)，从所述混合 DES 获得的苯回收率更高 (57.88%)，进一步证实了这一说法。此外，其分离效率优于环丁砜，但低于甘油，尽管其粘度相对于甘油降低了9.4%。