| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic solvent refining system where energy saving performance is excellent, the oxidation degradation of the organic solvent is hardly caused and ionic impurities can be removed with a small processing load.SOLUTION: An organic solvent refining system separating and refining an organic solvent from a mixed liquid containing the organic solvent such as N-methyl-2-pyrolidone (NMP) and the like whose boiling point at 1 atmospheric pressure is more than 100°C and water includes: a deaerator 21 removing a gas component contained in the supplied mixed liquid; a heating means such as a heat exchanger 12 heating the mixed liquid processed at the deaerator 21; and a pervaporation device 13 supplied with the heated liquid. The organic solvent is recovered from the concentration side of the pervaporation device 13. For example, a deaeration membrane is used as the deaerator 21.SELECTED DRAWING: Figure 1 |
