Process for producing ortho-nitro aromatic acids by oxidation of ortho-nitroalkylaromatic compounds
US5591890A · kind A · utility
7Cited by
4References
5Claims
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Key dates
| Filing date | Nov 3, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Nov 3, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C315/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing o-nitroaromatic acids by direct oxidation of the corresponding o-nitroalkylaromatic compounds, utilizing salts of certain catalytic metals in the presence of an oxygen-containing gas and an aliphatic aldehyde or ketone at elevated temperature and pressure, is provided. The process allows catalyst recovery and reuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.