2-氯-5-甲基吡啶结晶母液的分离

The Separation of 2-Chloro-5-methylpyridine from Mother Liquor

用萃取精馏法处理 2 氯 5 甲基吡啶结晶母液 ,得到 95 %以上含量的 2 氯 3 甲基吡啶与 2 氯 5 甲基吡啶 .萃取剂经循环使用分离效果没有下降 .同时讨论了影响萃取精馏分离效果的一些因素 .

A Φ 24?mm distillation column was established to separate 2 Chloro 3 methylpyridine and 2 chloro 5 methylpyridine from mother liquor by extractive distillation. The purity of both products was over 95%( wt. ). The results show that the recovered extractant can be reused. The main operational parameters in the extractive distillation process is also disussed.