Method of making .alpha.-chloroxylenes
US6117278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C22/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method for making high purity .alpha.-chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring halogenated benzotrichloride, benzotrifluoride, ring halogenated benzotrifluoride, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluorometaxylene, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluoroparaxylene, or a mixture thereof. The composition is heated to about 70 to about 160.degree. C. No base is present in the composition. Chlorine gas is sparged through the composition and chlorine free radicals are generated therein. The chlorine free radicals can be generated either with UV light or by means of a chlorine free radical initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.