PROCESS OF DEGUMMING VEGETABLE OIL BY MEANS OF ENZYMES

摘要

The vegetable oil to be degummed is adjusted to a pH from 3 to 6 and is mixed with an aqueous enzyme solution, which contains one of the enzymes phospholipase A1, A2 or B. In a degumming reactor the enzymes are permitted to act in the oil at temperatures from 20 to 90.degree.C with stirring. Before or after a separation of the degummed oil a separation promoter or a solubilizer is added at temperatures from 20 to 90.degree.C to the liquid which has been withdrawn from the degumming reactor. A substantially sludgefree solution, which contains used enzymes, is thus recovered and is recycled at least in part to a location preceding the degumming reactor. The content of recycled used enzymes in the total amount of the enzymes dispersed in the oil is at least 10%.