PRODUCTION OF POLYCHLORINATED PYRIDINE MIXTURES BY LIQUID PHASE CHLORINATION OF 3,5-LUTIDINE OR 3,5-LUTIDINE HYDROCHLORIDE

摘要

Preparation of large quantities of rich mixtures pyridines polychlorurées maintaining a weight ratio of chlorine / 3,5-lutidine greater than about 7: 1 during the non-catalytic reaction between chlorine and 3,5-lutidine or hydrochloride 3,5-lutidine in the liquid phase at temperatures exceeding about 150 ° C, the reagents being contained in a diluent producing a well mixed equal to or less than 2 moles of hydrogen chloride per mole of diluent during the reaction with chlorine in the temperature range stated. The reaction in a primary reactor (R1) is followed by a subsequent selective chlorination to obtain the final desired products useful as intermediates in the formation of herbicides and the like.