A production method of highly pure 2,4-dinitrochlorobenzene relates to the technical field of the
chemical industry. The method comprises the following steps: adding a
nitric acid and
sulfuric acid mixed acid into a
nitration kettle, adding p-
chloronitrobenzene in a dropwise manner, heating the
nitration kettle to 105DEG C, stopping stirring, allowing the obtained material to stand for layering, adding a waste acid into an extraction pot, adding p-
nitrochlorobenzene into the extraction after the extraction in order to react with residual
nitric acid in the waste acid, extracting organic matters in the extracted acid, allowing the obtained solution to stand for layering, inputting the waste acid into a concentration workshop section, concentrating, mechanically using, recovering the extracted p-
nitrochlorobenzene as a next batch
nitration material, adding a qualified nitrated liquid from the nitration kettle into a
neutralization water washing pot, adding Na2CO3.10H2O, washing to neutrality, stopping stirring, and allowing the obtained solution to stand for layering in order to obtain a finished product. The method has the advantages of simple and convenient preparation, small waste acid output, less equipment investment, high
out degree and convenient operation, and the prepared 2,4-dinitrochlorobenzene has the advantages of good use effect, safety and reliability.