Process for producing carboxylic acids
US6949673B2 · kind B2 · utility
6Cited by
4References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 21, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/0013
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Improved process for producing aromatic carboxylic acids by catalytic liquid phase oxidation of a corresponding precursor in a suitable solvent comprising feeding the reactants to a first oxidation reaction zone at high pressure and high solvent ratio, wherein uptake of oxygen is less than that required for full conversion of the precursor to its corresponding carboxylic acid, and then feeding the resulting reaction medium to a second oxidation reaction zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.