Preparation of N-phenyl-benzoquinoneimine from hydroxydiphenylamines
US6187937A · kind A · utility
2Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Dec 23, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C249/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A hydroxydiphenylamine compound can be converted to an N-phenylquinoneimine by reacting the hydroxydiphenylamine with oxygen or an oxygen containing gas in the presence of a modified activated carbon catalyst, the catalyst having had surface oxides removed therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.