Process for the hydroxylation of aromatic hydrocarbons
US6156939A · kind A · utility
4Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2000 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Apr 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for the hydroxylation of aromatic hydrocarbons by direct oxidation with hydrogen peroxide. The process is carried out in the presence of a catalyst comprising: PA0 iron, administered as inorganic salt; PA0 iron ligand, consisting of carboxylic acids of ether-aromatic compounds containing nitrogen, in particular pyrazin-2-carboxylic acid and derivatives; PA0 acidifying agent, especially trifluoracetic acid, and a solvent system comprising an organic phase consisting of a substrate and acetonitrile and an aqueous phase containing the catalyst and hydrogen peroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.