Waste tyre pyrolysis gasoline (WTPG) contain significant amount of aromatics such as benzene, toluene and xylenes (BTX) and thus provide a good source for these value-added chemicals. Separation of aromatics from aliphatic media as obtained in WTPG and naphtha is done commercially by solvent extraction using volatile organic solvents such as sulfolane (SUF), dimethylformamide (DMF) and diethylene glycol (DEG). The high cost of this state-of-the art separation method and environmental consideration have necessitated search for non-volatile and green solvent such as deep eutectic solvent (DES). This study intends to conduct a comparative evaluation of the performance of five solvents (SUF, DMF, DEG, and two DESs) for the extraction of BTX from WTPG. The two DESs are choline chloride/ethylene glycol (DES1) and choline chloride/glycerol (DES2) in molar ratios 1:2. An ASPEN plus simulation was carried out to generate liquid–liquid equilibria (LLE) data for the pseudo-ternary systems {WTPG + BTX + solvent (SUF/DMF/DEG/DES)}. Performance evaluation was based on selectivity (S) and solute (BTX) distribution coefficient (D). The propriety of the simulation protocol was validated using literature data. The results revealed the following maximum values of selectivity and distribution coefficients for the solvents: DES2 (S = 378.283, D = 0.656); DES1 (S = 77.364, D = 1.423); SUF (S = 55.371, D = 0.756); DMF (S = 25.336, D = 0.786) and DEG (S = 17.531, D = 0.793). The DESs therefore performed better than the organic solvents and can suitably replace same in the extraction of BTX from waste tyre pyrolysis gasoline.

废轮胎热解汽油（WTPG）包含大量的芳族化合物，例如苯，甲苯和二甲苯（BTX），因此为这些增值化学品提供了良好的来源。通过使用挥发性有机溶剂（例如环丁砜（SUF），二甲基甲酰胺（DMF）和二甘醇（DEG））的溶剂萃取，可以从WTPG和石脑油中的脂肪族介质中分离出芳香族化合物。这种最先进的分离方法的高成本和对环境的考虑使得必须寻找非挥发性和绿色溶剂，例如深共熔溶剂（DES）。这项研究旨在对从WTPG提取BTX的五种溶剂（SUF，DMF，DEG和两种DES）的性能进行比较评估。两种DES的摩尔比为1：2，分别为氯化胆碱/乙二醇（DES1）和氯化胆碱/甘油（DES2）。进行了ASPEN plus模拟，以生成伪三元体系{WTPG + BTX +溶剂（SUF / DMF / DEG / DES）}的液-液平衡（LLE）数据。绩效评估基于选择性（S）和溶质（BTX）分配系数（D）。使用文献数据验证了仿真协议的适当性。结果表明，溶剂的选择性和分布系数具有以下最大值：DES2（S  = 378.283，D  = 0.656）；DES1（S  = 77.364，D  = 1.423）; SUF（S  = 55.371，D  = 0.756）; DMF（S  = 25.336，D  = 0.786）和DEG（S  = 17.531，D  = 0.793）。因此，DES的性能优于有机溶剂，并且可以在从废轮胎热解汽油中提取BTX时适当替代它们。