Production of polychlorinated pyridine mixtures by liquid phase

Details Production of polychlorinated pyridine mixtures by liquid phase Production of polychlorinated pyridine mixtures by liquid phase

1983-09-06

1984-11-20

Jiles, Henry R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21172, C07D21184, C07D21361

Patent

active

044839936

ABSTRACT:
Preparation of high yields of mixtures rich in polychlorinated pyridines by maintaining a chlorine to beta-picoline weight ratio of greater than about 5:1 when reacting chlorine and beta-picoline or beta-picolie hydrochloride non-catalytically in the liquid phase at temperatures of at least about 190.degree. C., the reactants being contained in a well mixed diluent producing less than one mole of hydrogen chlorine per mole of diluent by reaction with the chlorine in the indicated temperature range. Chlorination of the beta-picoline or beta-picoline hydrochloride in a primary reactor is followed by selective further chlorination thereof in finishing reactor means at a temperature of at least about 190.degree. C. to obtain high yields of desired final products useful as intermediates in the formation of herbicides and the like. Like further chlorination to obtain such final products is also applicable to mixtures rich in monochloro-, dichloro-, and trichloro-3-trichloromethyl pyridines produced by other processes.

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