Abstract: This paper to the chlorine trifluoromethyl toluene as the starting material by the "three of nitrification" synthetic herbicide trifluralin intermediate 3,5 - Nitro -4 - chlorine trifluoromethyl toluene system of law discussed. Arranged for a nitrification orthogonal experiment to find the optimum conditions. Second of two nitrification were done a separate set of nitrification and acid test, also had a continuous nitrification of the test, reached a conversion rate of demand. Three of the initial proof of the nitration of 3,5 - Nitro -4 - chlorine trifluoromethyl toluene Process Improvement better results.
Keywords:Trifluralin; 3,5 - Nitro -4 - chlorine trifluoromethyl toluene; chloro trifluoromethyl toluene; three denitrification;