申请人:Kalama Chemical, Inc.
公开号:US04507486A1
公开(公告)日:1985-03-26
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 150.degree. C., the reactants being contained in a well mixed diluent producing 2 moles or less of hydrogen chlorine per mole of diluent by reaction with the chlorine in the indicated temperature range. Reaction in a primary reactor is followed by selective further chlorination to obtain desired final products useful as intermediates in the formation of herbicides and the like.
通过在液相中以大于约7:1的氯与3,5-芘啶或3,5-芘啶盐酸盐的重量比反应氯和3,5-芘啶或3,5-芘啶盐酸盐,保持氯与3,5-芘啶重量比大于约7:1,以高于约150°C的温度反应,使用混合稀释剂将反应物混合均匀,每摩尔稀释剂产生不超过2摩尔氢氯酸,随后在初级反应器中进行选择性进一步氯化,以获得所需的最终产物,可用作除草剂等形成中间体。