Edible oil and fat prodn. powder treatment for recovery and cleaning - by mixing with hot alkaline water, settling and decanting phases, for decolourising, filtration or dewaxing food oils and fats

摘要

Powders (T) are treated after use. The powders are mixed with hot water (5) at ca. 90 deg.C, up to a concn. of 35% solids. An alkaline liq. (7) is added to form the pH of the mixt. to ca. 9. After sepn. of the three phases of oil, water, and powder, by density the powders (53) may be collected separately. USE/ADVANTAGE - Recovery and cleaning of powders used for decolourising, filtration, or dewaxing of food oils and fats. The treatment reduces the level of oil in the powder to less than 1%, allowing them to be reused in agriculture. Oils removed from the powder may be reused directly as they are not denatured. The treatment is simple, free from pollution risks, and may treat a reasonable tonnage at acceptable cost.