The application provides a method for preparing 4,4'-diamino dicyclohexyl
methane based on a circulation reactor continuous hydrogenation, and belongs to the technical field of
chemical reaction engineering. The method is that 4,4'-diamino diphenyl
methane is mixed with an
organic solvent, heated through a preheater first, fully mixed with
hydrogen in a gas-liquid mixer after reaching a certain temperature, forms a gas-liquid mixed fluid, and is subjected to
hydrogenation reaction with a supported
ruthenium catalyst and a
deamination retarder in a circulation reactor to prepare 4,4'-diamino dicyclohexyl
methane. The application adds the
deamination retarder in the circulation reactor
hydrogenation process, reduces the
deamination side reaction of the target product, thereby improving the yield of the target product, reducing the production cost of the unit yield of the target product, and the reaction pressure is low, the safety is high, the production efficiency is high, and the method has important application value in the actual
mass production in industry.