Cryogenic Processing of Materials
Freeze granulation is a commercial method for cryogenic processing (granulation) of chemicals and powder-based materials. A unique cryofixation of the material in small droplets gives homogeneous granules and improved properties in the final product.
The slurry is pumped and sprayed into liquid nitrogen for instant freezing of the derived droplets. The frozen droplets (granules) are then freeze dried in a freeze dryer to remove the solvent (water or organic solvent) by sublimation with a minimum damage of organic compounds and without disturbing the homogeneity.