Microencapsulation, Spray Drying Spray congealing techniques basic methodology @ Mrs. Arti Majumdar

Microencapsulation Spray Drying Spray congealing method. In Spray Drying, the coating solidification effected by rapid evaporating of solvent in which coating material is dissolved.
Where as in Spray Congealing the coating solidification is effected by thermally congealing a molten coating material. The removal of solvent is done by sorption, extraction or evaporation technique. Core material is dispersed in a coating material melt rather than a coating solution. Coating solidification and microencapsulation is accomplished by spraying the hot mixture into a cool air stream.
example: microencapsulation of vitamins with digestible waxes for taste masking.