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US 4,227,001 AGranted
Preparation of polychlorinated pyridines from 2,4-dichloro-6-(trichloro methyl)pyridine
AssigneeThe Dow Chemical Company
InventorsThomas J. Dietsche, Jim Love
Life of this patent
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Abstract
Pentachloropyridine and polychloro derivatives of 2-(trichloromethyl)pyridine are prepared by reacting 2,4-dichloro-6-(trichloromethyl)pyridine in the liquid state with chlorine at temperatures of from about 160.degree. C. in the presence of an amount of catalyst effective to catalyze the reaction.
Claims14
A process for preparing chlorinated pyridine compounds which comprises contacting, in liquid phase, a starting material of the formula:
- ##STR3## wherein R and R' each independently represent chloro or H, with the proviso that at least one of R and R' is always H, with chlorine at a temperature of at least about 160.degree. C. to about 220.degree. C. at superatmospheric pressures from about 190 psig to about 220 psig in the presence of a catalyst Lewis acid and amount thereof effective to catalyze the reaction, and thereafter recovering said chlorinated pyridine compounds.
Dependencies are inferred from the claim text.