Methods of removing acetic acid from cyclohexane in the production of adipic acid
US5929277A · kind A · utility
8Cited by
58References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to methods of removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitated by introduction of additional cyclohexane. The removal of acetic acid is preferably conducted by use of rather small amounts of wash-water in one to three stage extractors. A two stage reactor is preferable as being more efficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.