Destruction of nitrated aromatics
US4708806A · kind A · utility
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19References
6Claims
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Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/909
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for destroying nitrated aromatics, e.g., the nitrophenol byproducts produced in the nitration of benzene to dinitrobenzene, is disclosed. The process involves treatment of an aqueous solution of the nitrated aromatics with iron and hydrochloric acid with or without ferric chloride using 0.2 to 7 molecular equivalents of finely divided iron based on the organic nitro groups present. The reaction is carried out at 0.degree. to 100.degree. C. and pH 1.5-3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.