Purifier of fine chemicals

The utility model relates to a purifier of fine chemicals. The utility model is especially suitable for the purifying separation of organic solvent in the class of comprising amino group. The utility model has the technical proposals that the utility model comprises a pressure reducing distillation kettle, an infusion pump, an air pump, pipe lines and a control valve, wherein the pressure reducing distillation kettle is a closed structure, the pipe line of the air pump which enters from the bottom of the pressure reducing distillation kettle is connected with a gas nozzle and the pipe line of the infusion pump which enters from the upper part of the pressure reducing distillation kettle is connected with a liquid nozzle. The upper part of the pressure reducing distillation kettle is also provided with a gas outlet pipe line after reaction, and the outlet pipe line is connected with a vacuum pump. The pipe line of the air pump is also provided with a gas drying tank and a gas heater. The outlet pipe line is also provided with a heat exchanger and a product collector. The utility model has the advantages of enhancing product purification rate, shortening purification time and reducing cost and energy consumption.