| 摘要 |
<p>Preparation of high yields of mixtures rich in polychlorinated pyridines by maintaining a chlorine to 3,5-lutidine weight ratio of greater than about 7:1 when reacting chlorine and 3,5-lutidine or 3,5-lutidine hydrochloride non-catalytically in the liquid phase at temperatures in excess of about 150oC, the reactants being contained in a well mixed diluent producing 2 moles or less of hydrogen chloride per mole of diluent by reaction with the chlorine in the indicated temperature range. Reaction in a primary reactor (R1) is followed by selective further chlorination to obtain desired final products useful as intermediates in the formation of herbicides and the like. </p> |
