Oxidation of alkyl aromatic compounds to aromatic acids in an aqueous medium
US6759550B1 · kind B1 · utility
1Cited by
8References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Nov 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/265
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention pertains to an improved method of oxidizing substituted aromatic compounds (such as p xylene) to their corresponding aromatic acids (such as terephthalic acid). The improvement involves carrying out the oxidation reaction in an aqueous medium, wherein the aqueous medium contains at least 30 percent water, preferably up to 30 percent surfactant and preferably a low molecular weight material containing a hydrophilic end group as a co-surfactant. The reaction is carried out at a pH of less than 3.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.