Method for Adiabatic Cooling Type Crystallization of Organic Compound and Apparatus Therefor

摘要

The present invention provides a method for adiabatic cooling type crystallization of organic compound and an apparatus therefore, by which running cost and facility cost can be reduced. The method comprises carrying out adiabatic cooling and evaporation operation of a coolant in a crystallizer 20 for a mixture solution of a target organic compound containing the coolant; taking out crystal slurry produced by the operation from the crystallizer 20; pressurizing evaporated vapor to a pressure higher than the operation pressure in the crystallizer 20 by a compressor 30 and then introducing the vapor to an absorption condenser 10; cooling for condensation the mixture solution of organic compound and the evaporated vapor that has been pressurized while allowing them to contact each other in the absorption condenser 10; and introducing the crystal slurry taken out of the crystallizer 20 to a purification means 70 for purification of the crystal, wherein a clarified liquid in the purification means 70 is introduced to at least one of the crystallizer 20 and the absorption condenser 10.