PRODUCTION OF CHLORINATED AROMATIC HYDROCARBONS

PROBLEM TO BE SOLVED: To provide a method for producing chlorinated aromatic hydrocarbons by which an organic waste liquor from a step for producing hydrochloric acid of the method is dehydrated by adsorption, the resultant dehydrated organic waste liquor as a raw material is returned to a step for reacting the aromatic hydrocarbons with chlorine gas or hydrogen chloride gas and the conventionally disposed organic waste liquor from the step for producing the hydrochloric acid can effectively be utilized. SOLUTION: This method for producing chlorinated aromatic hydrocarbons includes a dehydrating step for dehydrating an organic waste liquor recovered at the time of carrying out the liquid-liquid separation of an absorbent in a hydrochloric acid recovering step to