Process for the preparation of organic isocyanates from nitro derivatives
US4323515A · kind A · utility
1Cited by
4References
39Claims
0Family size
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Key dates
| Filing date | Sep 20, 1979 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Sep 20, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/824
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the synthesis of aromatic isocyanates by the reduction of aromatic derivatives with carbon monoxide in the presence of catalysts consisting of metal complexes of porphyrins. In one embodiment, the metallic porphyrin is synthesized in situ from a porphryin and a metal or a metal derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.