PROCESS FOR PREPARING MONONITROCHLOROBENZENE

摘要

In a process for the preparation of mononitrochlorobenzene by nitration of chlorobenzene using a mixed acid of nitric acid and phosphoric acid, the nitration reaction is carried out by using a molar ratio of nitric acid to chlorobenzene of not more than equimol in the presence of a concentrated phosphoric acid as the phosphoric acid component at temperatures of 50 DEG -120 DEG C. while maintaining the concentration of phosphoric acid to 72.4 weight % as P2O5 or more during the reaction.