Formation of quinonedimines from phenylenediamines by catalytic oxidation
US5959126A · kind A · utility
3Cited by
10References
28Claims
0Family size
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Key dates
| Filing date | Feb 12, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Feb 12, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A phenylenediamine compound can be converted, with high selectivity, into its corresponding quinonediimine by reacting the phenylenediamine with oxygen in the presence of a modified activated carbon catalyst in an aqueous system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.