Process for preparing ethylene glycol
US4400559A · kind A · utility
31Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1982 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Jun 14, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethylene glycol is prepared by a process in which ethylene oxide is extracted from an aqueous solution with near-critical or super-critical carbon dioxide. Thereafter an ethylene oxide--carbon dioxide--water mixture is contacted with a catalyst to form ethylene carbonate, which is then hydrolyzed to ethylene glycol in the presence of the same catalyst. The ethylene glycol is separated as product and the carbon dioxide and the catalyst are recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.