Preparation method, production equipment and use method of 2, 4, 6-trichloroaniline

The invention relates to a preparation method of 2, 4, 6-trichloroaniline, which comprises the following steps: adding chlorobenzene and aniline into a reaction kettle for synthesis, then introducing hydrogen chloride gas, and finally introducing chlorine gas; after the chlorine is introduced, keeping the temperature until the reaction is complete, filtering to obtain a filter cake and filtrate, carrying out filter pressing on the filter cake, and drying to obtain 2, 4, 6-trichloroaniline, wherein the filtrate is chlorobenzene; and adding hydrogen chloride gas generated in the reaction kettle for synthesis and the filtered chlorobenzene into a reaction kettle for acidification, acidifying the chlorobenzene by using the hydrogen chloride gas, and then adding the acidified chlorobenzene into the reaction kettle for synthesis to provide a reaction environment for the synthesis reaction. The tail gas (hydrogen chloride gas) generated by the synthesis reaction is reused, a better acid environment can be provided f