Separation of n-heptane from benzene by extractive rectification with salted liquid was studied.Salted dimethylformamide(DMF)was chosen as extractant.

• 以含盐二甲基甲酰胺溶剂为萃取剂,利用加盐萃取精馏方法对苯-正庚烷的分离进行研究。