Synthesis method of 2, 4-dichloro-3, 5-dinitrobenzotrifluoride

The invention discloses a synthesis method of 2, 4-dichloro-3, 5-dinitrobenzotrifluoride, which comprises the following steps: by taking 2, 4-dichlorotoluene and nitric acid/sulfuric acid as raw materials, synthesizing by using a continuous flow reactor under the action of a catalyst to obtain 2, 4-dichloro-3, 5-dinitrotoluene; the content of the obtained 2, 4-dichloro-3, 5-dinitrotoluene is larger than or equal to 99%, the conversion rate is larger than 99%, the yield is larger than 90%, the waste sulfuric acid can be recycled after pretreatment, and compared with the prior art, the method has the advantages that the working procedures are few, the process is simple, the energy consumption is low, the product quality is high, and the process cleaning degree and the intrinsic safety are remarkably improved. 本发明公开了一种2,4-二氯-3,5-二硝基三氟甲苯的合成方法，以2,4-二氯甲苯，硝酸/硫酸为原料，在催化剂作用下使用连续流反应器合成得到2,4-二氯-3,5-二硝基甲苯；得到的2,4-二氯-3,5-二硝基甲苯，含量≥99％，转化率＞99％，收率＞90％，废硫酸经过预处理后可以循环套用，与目前现有的技术相比，工序少、工艺简单、能耗低、产品质量高，工艺清洁化程度及本质安全性显著提升。