Process for producing polychlorobenzonitrile

摘要

A process for producing polychlorobenzonitrile having chlorine atoms at the 2,6-position by ammoxidation of toluene derivative having chlorine atoms at the 2,6-position with a gas containing ammonia and oxygen in vapor phase in the presence of a catalyst, characterized in that bromine and/or a bromine-containing compound is added to the reaction system.