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研究了沸点相近物质的萃取蒸馏分离方法，首次报道了邻、对氯甲苯的萃取蒸馏试验．在第三组份（溶剂）存在的情况下，环己烷和苯以及邻、对氯甲苯的相对挥发度都有了不同程度的改善，这对于它们的精馏分离具有一定意义．一缩二乙二醇对邻氯甲苯和对氯甲苯相对挥发度影响的机理还需进一步探讨．
The extraction distillation separation method of similar boiling point substances was studied. The extraction distillation experiments of o-and p-chlorotoluene for the first time were reported. In the presence of the third component (solvent), the relative volatility of cyclohexane, benzene and ortho-p-chlorotoluene has been improved to some extent, which is of significance for their distillation separation. The mechanism of the effect of diethylene glycol on the relative volatility of o-chlorotoluene and p-chlorotoluene needs to be further explored.