The Static melting crystallizer makes a static molten mixture crystallization, sweating and melting on the surface of the Platecoil plates in stages, ultimately purifying one or more products from the mixture. lt is also called Platecoil solvent-free crystallizer because no solvent is used in the crystallization and purifying process. The Static melting crystallizer innovatively uses Platecoil plates as heat transfer elements and inherently has advantages that conventional separation technologies do not have.