Method for producing 2,4-difluroaniline by virtue of solvent-free catalytic hydrogenation method

The invention provides a method for producing 2,4-difluroaniline by virtue of a solvent-free catalytic hydrogenation method. According to the method, 2,4-difluroaniline is prepared through catalytic hydrogenation in a high-pressure kettle by adding a catalyst and phosphate under a solvent-free condition. Compared with a solvent hydrogenation method in the past, the solvent-free hydrogenation method has the advantages that the reaction efficiency is greatly improved, the utilization rate of equipment is obviously increased, meanwhile, the energy consumption and equipment cost due to recycling of a solvent can be effectively avoided, the method is a pollution-free environment-friendly process, and the generation of a large number of wastewater and waste residues is effectively avoided. By utilizing a noble metal catalyst, namely Pt/C, the preparation is simple, the catalyst can be circularly used in the reaction, and the metal can be recycled, so that the production cost is further lowered; and by utilizing pho