申请人:THE DOW CHEMICAL COMPANY
公开号:EP0402536A1
公开(公告)日:1990-12-19
A process for preparing 2,3,4,6-tetrachloropyridine is disclosed which comprises chlorinating 2,6-dichloro-4-trichloromethylpyridine, preferably in the presence of a catalyst, to form 2,3,6-trichloro-4-trichloromethylpyridine which is then reacted with chlorine gas, in the absence of a catalyst, to form the desired product.
本发明公开了一种制备 2,3,4,6-四氯吡啶的工艺,该工艺包括氯化 2,6-二氯-4-三氯甲基吡啶(最好在有催化剂存在的情况下),生成 2,3,6-三氯-4-三氯甲基吡啶,然后在无催化剂的情况下与氯气反应生成所需的产品。