Modified physical refining of soybean oil

Details Modified physical refining of soybean oil Modified physical refining of soybean oil

2005-08-02

2005-08-02

Carr, Deborah D. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Fatty compounds having an acid moiety which contains the...

C554S009000, C426S489000, C426S492000, C426S634000

Reexamination Certificate

active

06924381

ABSTRACT:
A solvent extraction free, process for producing refined soybean oil that is high in calcium and/or magnesium is described in which mechanically extracted crude soybean oil is subjected to a two-stage process to separate hydratable and nonhydratable phospholipids. In the first stage, the crude oil is intimately mixed with water or with a weakly acidic aqueous solution, e.g., a aqueous solution of citric acid or a similar organic acid, to form gums of the hydratable phospholipids. After removing the gums from the oil, e.g., by centrifuging, the oil from the first degumming is intimately mixed with a weakly basic solution, e.g., an aqueous solution of sodium hydroxide or sodium metasilicate, to produce soapstock and reduce the magnesium and calcium in the oil to less than 100 ppm, followed by separation of the soapstock, e.g., by centrifuging. Free fatty acids are then removed through physical refining.

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