Process for preparing mononitrochlorobenzene
US4476335A · kind A · utility
1Cited by
2References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 30, 1982 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Nov 30, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a process for the preparation of mononitrochlorobenzene by nitration of chlorobenzene using a mixed acid of nitric acid and phosphoric acid, the nitration reaction is carried out by using a molar ratio of nitric acid to chlorobenzene of not more than equimol in the presence of a concentrated phosphoric acid as the phosphoric acid component at temperatures of 50.degree.-120.degree. C. while maintaining the concentration of phosphoric acid to 72.4 weight % as P.sub.2 O.sub.5 or more during the reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.