| 摘要 |
PURPOSE: To efficiently extract nonpolar substances from polar substances in a liquid phase by bringing the liquid phase containing substances to be extracted into contact with a supercritical gas such as CO2 flowing in a countercurrent direction in an extraction tower equipped with perforated trays. CONSTITUTION: The liquid phase which contains the nonpolar substances such as n-paraffin as the substances to be extracted and which is a polar substance being a mixture compound of sulfonic acid, water and sulfuric acid is brought into contact with the supercritical gas such as CO2 flowing in the countercurrent direction in the extraction tower equipped with perforated trays to extract and separate the nonpolar substances. As the extraction tower, a tower, which has perforated trays inside and an equipment for controlling a level of a heavy phase and for extracting the phase and which is substantially constituted of a high-pressure pipe, is preferable. Further the extraction tower in which the same trays are alternatively disposed by rotating by 180 deg. to each other is preferable.
|
