Keyword : dry fractionation

Dry fractionation is the process in which separation of the solid from liquid portion of the oil is achieved by a process of gradual cooling a preheated oil. The preheating ( to about 70°C ) is done to destroy any crystal present. Crystal formation and growth occurs as the oil is agitated and cooled using chilled water circulating in the jackets or cooling coils of the crystallizers. When the oil reaches the desired temperature, the cooling is stopped. The oil which is in the form of slurry is then filtered to separate the solid stearin from liquid olein.