Method for separating organic solvent mixture and separation apparatus for organic solvent mixture

摘要

Problem to be solved: to provide a separation method of an organic solvent mixture capable of separating a specific organic solvent from an organic solvent mixture containing a plurality of organic solvents with a small consumption energy and an apparatus for separating an organic solvent mixture.Solution: an organic solvent separation method includes a first separation step for separating and concentrating a predetermined organic solvent from a mixed solution ms of an organic solvent by reverse osmosis, and a second separation step for separating and enrichment a predetermined organic solvent by a permeation method from concentrated liquid CS1 separated and separated in a first separation step . In the first separation step, a predetermined organic solvent is separated and concentrated at an operating pressure of 50 to 1000 bar.Diagram