Dehalogenation of halogenated aromatic compounds
US4973783A · kind A · utility
2Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Mar 16, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D2101/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Various halogenated aromatic compounds, particularly polychlorinated biphls, and the like, are dehalogenated by reaction with alkali metal in the presence of liquid hydrosiloxane. A selected solvent or diluent may be present. The alkali metal halide reaction product may be removed by washing. It has been found substantially complete dehalogenation is achieved readily at ambient temperatures when the hydrosiloxane is present. The dehalogenated aromatic moiety normally is recovered intact. This method has been found very effective in the destruction and removal of PCB contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.