Catalytic reduction of nitro aromatic compounds with hydrogen sulfide and carbon monoxide
US4387247A · kind A · utility
3Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | Jun 11, 1980 |
| Grant date | Jun 7, 1983 |
| Priority date | — |
| Expiry date | Jun 11, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the reduction of di- or polynitro aromatic compounds by gaseous H.sub.2 S over a solid catalyst, addition of CO gas promotes formation of amino groups from all nitro groups in the molecule. A preferred embodiment is reduction of 2,4- and/or 2,6-dinitrotoluene in vapor phase at 325.degree. C. over a supported iron or supported cobalt catalyst on a support comprising alumina. The amino products are useful for production of polyurethane resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.