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US 10,329,514 B2Granted
Enzymatic degumming
AssigneeAlfa Laval Corporate AB
InventorsAlexey Shevchenko, Ling Hua
Life of this patent
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Abstract
The present invention relates to a method for treating vegetable oils and/or animal fats. The method comprises adjusting temperature, treatment with acid, adjusting pH, contacting the aqueous mixture with enzyme, crystallization of high melting glycerides and separation.
Claims21
A method for treating vegetable oils and/or animal fats, comprising the following steps:
- (i) adjusting the vegetable oils and/or animal fats to a temperature within a range from about 20 to about 90° C.;
- (ii) pre-treating the vegetable oils and/or animal fats with acid for at least 1 minute;
- (iii) adjusting a pH of the pretreated vegetable oils and/or animals fats with lye to a pH within a range from about 4 to about 8 at a temperature of at least 20° C. to obtain an aqueous mixture;
- (iv) adding enzymes to the aqueous mixture to form lysophospholipids and free fatty acids from phospholipids in the aqueous mixture;
- (v) reducing a temperature of the aqueous mixture comprising the lysophospholipids and the free fatty acids obtained in step (iv) to a crystallization temperature of high melting glycerides and conducting centrifugation;
- (vi) separating the aqueous mixture into an aqueous phase and a treated phase comprising treated vegetable oils and/or treated animal fats;
- and
- (vii) optionally treating the treated phase with hot water or with silica adsorption.
5 more elements
Dependencies are inferred from the claim text.