Process method for preparing trifluoromethylaniline through continuous catalytic hydrogenation reduction

The invention discloses a process method for preparing trifluoromethylaniline through continuous catalytic hydrogenation reduction. The invention provides a preparation method of trifluoromethylaniline, which comprises the following steps: in an organic solvent, in the presence of hydrogen and a solid catalyst, reacting nitrobenzotrifluoride in a hydrogenation kettle to obtain trifluoromethylaniline, wherein the solid catalyst is settled in a settling tank and then returns to the hydrogenation kettle for continuous use. According to the preparation method provided by the invention, the uninactivated solid catalyst can be separated and recycled in a continuous production system with pressure, the catalyst concentration of the system is kept, the stability of the reaction system is ensured, and the product quality and the production efficiency are improved. 本发明公开了一种连续催化加氢还原制备三氟甲基苯胺的工艺方法。本发明提供了一种三氟甲基苯胺的制备方法，其包括如下步骤：在有机溶剂中，在氢气和固体催化剂存在下，硝基三氟甲苯经加氢釜反应得到三氟甲基苯胺；其中，所述固体催化剂经沉降槽沉降后返回所述加氢釜继续使用。本发明提供的制备方法可在带压的连续生产系统中将未失活的固