The LIST continuous crystallization process combines the processes of evaporation, crystallization and drying in one single-shaft LIST KneaderReactor under vacuum. In the mixing chamber, the solvent in the feed product undergoes flash evaporation. As the solution becomes super-saturated, the product is crystallizing. The amount of evaporation duty and crystallization heat level out such that no major heat transfer is required.

After the evaporation stage, the crystals are still wet, sticky and capable of forming large agglomerates. The design of the LIST Kneader Reactor provides effective drying in combination with a slight grinding action at minimal product buildup and crust formation. A recycling of dry product within the product chamber is not required.

The feed solution is incooperated into a solid particle bed which seeds the crystallization and limits the mechanical power and shaft torque.

Throughout the process, the large heat exchange surfaces ensure precise temperature control.