Process for preparing 2,6-dichlorotoluene
US4721822A · kind A · utility
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7Claims
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Key dates
| Filing date | May 14, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | May 14, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Liquid para-toluenesulfonyl chloride is reacted with chlorine gas at elevated temperatures in the presence of a catalytic amount of a Lewis acid catalyst, preferably antimony trichloride. Sulfuric acid is added then the reaction mixture is heated and subsequently cooled to about room temperature. Ammonium hydroxide is added then the reaction mixture is distilled to yield a substantially pure 2,6-dichlorotoluene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.