| abstract |
(57) Abstract: [PROBLEMS] To efficiently extract glycols such as ethylene glycol with high purity by using a medium in a supercritical state as an extraction medium. SOLUTION: 0.3 to 100 parts by weight of carbon dioxide A method for extracting glycols, comprising using carbon dioxide in a supercritical state, to which 5 parts by weight of alcohol is added, as an extraction medium, and bringing an object to be treated containing glycols into contact with the extraction medium. According to this extraction method, glycols are highly purified and have a content of about 1 from the glycol-containing material to be treated. 00% can be extracted. |