SEPARATION OF LOWER ALCOHOL

摘要

PURPOSE:To effectively separate lower alcohol as vapor from a liq. mixture of the alcohol with an org. ether by bringing the mixture into direct contact with one side of a heat resistant asymmetric separating membrane of an arom. polyamide. CONSTITUTION:A liq. org. compd. mixture of 1-4C lower alcohol with an org. ether is fed into a separating membrane module and brought into direct contact with an asymmetric separating membrane of an arom. polyamide built in the module. The permeation side of the membrane is kept under reduced pressure as required and the lower alcohol is allowed to selectively permeate the membrane, vaporized and separated. The highly concd. org. ether is finally taken out and recovered from the feed side of the membrane and vapor contg. a highly concd. lower alcohol from the permeation side. By this method, the lower alcohol is industrially and stably separated and recovered over a long time.