Producing a halogenated benzene derivative using zeolite catalyst treated with alkali solution of pH 11 or more
US4740641A · kind A · utility
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Key dates
| Filing date | Nov 6, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Nov 6, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A p-substituted halobenzene derivative, which is very valuable in industry, can be obtained by halogenation of benzene and/or a benzene derivative in a liquid phase at a temperature of 0.degree. to 200.degree. C. at a higher selectivity and yield than in known processes, using, as a catalyst, an L type zeolite alkali-treated with an alkali solution of pH 11 or above at a temperature of 0.degree. to 100.degree. C. for 0.5 to 100 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.