Preparation of meta-chlorophenols by selective hydrodechlorination of polychlorophenols
US4410738A · kind A · utility
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4References
29Claims
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Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Meta-chlorophenols useful as intermediates in various organic syntheses are prepared by selectively catalytically hydrodechlorinating a polychlorophenol in liquid phase in an acid solvent medium which is at least partially aqueous, in the presence of a Group VIII noble metal catalyst and at least one Group 1b to 5a heavy metal, said polychlorophenol bearing chlorine substituents in both the meta- and ortho- and/or para-positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.