Method for producing 2,3,4-trifluoroaniline by adopting solvent-free catalytic hydrogenation

The invention provides a method for producing 2,3,4-trifluoroaniline by adopting solvent-free catalytic hydrogenation. According to the method, 2,3,4-trifluoronitrobenzene is taken as a raw material;and the 2,3,4-trifluoronitrobenzene is subjected to catalytic hydrogenation, without a solvent, in the presence of a catalyst and phosphates in a high-pressure reactor so as to prepare the 2,3,4-trifluoroaniline. Compared with existing hydrogenation with solvents, the solvent-free hydrogenation adopted by the method is greatly increased in reaction efficiency, so that the equipment utilization rate is obviously improved; at the same time, energy consumption and equipment cost due to solvent recovery are also effectively avoided, so that the method is a green and pollution-free environment-friendly technology which is capable of effectively avoiding production of a large amount of waste water and waste residues. The method for producing the 2,3,4-trifluoroaniline by adopting the solvent-free catalytic hydrogenation