Separation of methylene chloride from n-pentane by extractive distillation

摘要

Methylene chloride cannot be completely separated from n- pentane by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from n-pentane by extractive distillation. Typical effective agents are 2- pentanone, isopropyl acetate or methanol.