Patent ID: 7777079

Claim:
A preparation method of 2,6-dichloro-4-trifluoromethylaniline (I), including the following steps: a) p-Chlorobenzotrifluoride (III) and chlorine are reacted at mole ratio 1:1˜6 with elemental metal and metal halide as catalyst under reaction temperature of 50° C.˜150° C., after completion of reaction separate the reaction product to obtain 3,4,5-Trichlorobenzotrifluoride (II); b, Put the 3,4,5-Trichlorobenzotrifluoride (II) obtained in the step a) and liquid ammonia together at mole ratio 1:6˜40, add proper amount of water to control concentration of the liquid ammonia between 60 wt˜80 wt %, make them react under reaction temperature of 150° C.˜178° C. and reaction pressure of 1.0 MPa˜13.5 MPa for 1˜30 h, then separate the reaction product to obtain 2,6-dichloro-4-trifluoromethylaniline (I);