Process for treatment of waste gas from a cyclohexane oxidation reactor
US5505920A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 4, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Oct 4, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/1487
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the treatment of waste gas discharged from a cyclohexane oxidation reactor used in the manufacture of adipic acid, said waste gas containing mainly nitrogen, oxygen, carbon monoxide, carbon dioxide, acetic acid, and up to 10% by weight cyclohexane, as well as other gases or vapors, by (a) scrubbing the waste gas from the cyclohexane oxidation reactor with acetic acid in a first absorption step to reduce the amount of cyclohexane to a residual content of less than about 1% by weight, (b) scrubbing the waste gas from the first absorption step with water in a second absorption step to reduce the amount of acetic acid to a residual content of less than about 1% by weight, and (c) subjecting the scrubbed waste gas from the second absorption step to an oxidation step to oxidize carbon monoxide and other oxidizable components of the waste gas to carbon dioxide and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.