Preparation of substituted aromatic amines
US6069279A · kind A · utility
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14References
23Claims
0Family size
Inventors
Key dates
| Filing date | Jun 14, 1999 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Jun 14, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the preparation of aromatic amines such as N-phenyl-p-phenylenediamine wherein an aromatic amine such as aniline is oxidized with oxygen or hydrogen peroxide in the presence of a metal pentacyano ferrate(II) complex, includes subsequent catalytic reduction of the complex by hydrogenation in the presence of a metal catalyst having at least two Group VIII metals, preferably platinum in combination with ruthenium either together on a single carbon support or each metal separately on carbon supports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.