Process for recovering bromine from waste liquid
US4324665A · kind A · utility
1Cited by
4References
5Claims
0Family size
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Key dates
| Filing date | Nov 5, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/04
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This is a process for recovering bromine from a waste liquid formed in the production of an aniline derivative by ammonolysis of a nuclear substituted bromobenzene derivative with a halogen atom or a functional group. The waste liquid is first subjected to chlorine treatment in alkaline region to remove most part of ammonia and aniline derivatives, and then it is subjected to chlorine treatment in acidic region to recover bromine. The process does not involve danger of explosion accidents and can be smoothly operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.