Preparation of halogenated benzene derivatives
US4792644A · kind A · utility
3Cited by
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13Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the liquid phase chlorination of benzene derivatives including benzene per se in the presence of a zeolite possessing the main pores having the opening formed of a 12-membered oxygen ring; para-substituted chlorinated benzene derivatives are preferentially obtained by adding a small quantity of a quaternary ammonium salt or salts to the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.