Cyanide reduction in nitroaromatic process
US4361712A · kind A · utility
10Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1980 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | May 19, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method of eliminating or substantially reducing the amount of cyanide formed in a polynitroaromatic, e.g. dinitrotoluene process. The invention comprises removing the nitrophenolic material from the mononitroaromatic formed in a first stage nitration of toluene prior to feeding the mononitroaromatic to the subsequent nitration zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.