Method for purifying aromatic amines

Purifying aromatic amines, produced by reduction of aromatic nitro compound, comprises separating reaction water generated during the reduction; mixing the raw amine (1) with an aqueous solution of an alkali hydroxide (2); feeding the mixture into a distillation column; partially/completely extracting the residue; partially vaporizing the residue in a main vaporizer and at least one post vaporizer; and completely returning the gas phases (10), and partially refeeding the fluid phases in the column and partially/completely discharging the liquid phase that occurs in the post evaporator. Purification of aromatic amines, which are produced by reduction of aromatic nitro compound, where the product mixture obtained from the reduction step is subjected to the cleaning process, comprises separating the reaction water generated during the reduction step by phase separation, where the obtained raw amine has a solubility of water in raw amine conforming to the remaining quantity of raw amine to water, which is dependent on pressure and temperature as well as the exact composition of the raw amine and which has 4-10 mass.% of the raw amine; mixing the obtained raw amine with an aqueous solution of an alkali hydroxide; feeding the mixture into a distillation column, where the distillation column has an upper reinforcing part, a lower reinforcing part and an output part; partially or completely extracting the residue from the area below the output part; optionally vaporizing the residue; partially vaporizing the obtained residue in a main vaporizer and at least one post vaporizer kept downstream, where the post vaporizer at high temperature is operated than the main evaporator up to a residual content of aromatic amines in the operation of the post vaporizer of 0-98 mass%; and completely returning the obtained gas phases, and partially refeeding the fluid phases in the column either below or over the output part and partially or completely discharging the liquid phase (5) that occurs in the post evaporator.