邻氯甲苯是“杀草丹”生产过程的副产物,量大价值低。若将它异构化,所得对氯甲苯可直接再作为“杀草丹”的主要原料;所得间氯甲苯水解为间甲酚后又是“速灭威”等农药的主要原料。因此邻氯甲苯异构化是个有意义的综合利用课题。1980年以来国外对邻氯 O-chlorotoluene is a by-product of the “herbicide Dan” production process, with large quantities of low value. If it is isomerized, the resulting p-chlorotoluene can be directly used as the main raw material for “herbicide dan”; the resulting m-chlorotoluene is hydrolyzed to m-cresol and then the main raw material of the pesticide such as “quick destroy”. Therefore, isomerization of o-chlorotoluene is a meaningful topic of comprehensive utilization. Foreign o-chlorine since 1980