Close-coupled process for improving the stability of soybean oil

Details Close-coupled process for improving the stability of soybean oil Close-coupled process for improving the stability of soybean oil

1986-08-07

1989-03-28

Lone, Werren B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604107, 260425, 260428, C09F 510, C11B 300

Patent

active

048161896

ABSTRACT:
A close-coupled method of treating unrefined, unbleached soybean oil to produce a stable edible frying oil. The close-coupled process involves performing a series of steps to refine and bleach unrefined, unbleached soybean oil in a continuous sequence without intermediate storage and without substantial exposure to oxygen in the air which can lead to oxidation of heated oil, as follows: treating unrefined, unbleached soybean oil with a caustic agent; heating and water washing the treated soybean oil; degassing the soybean oil to remove a substantial portion of any oxygen and water entrained in the oil; dispersing into the oil a minor amount of finely divided, activated metallic salts and oxides including bleaching earths, clays, etc.; and heating the resulting dispersion in a carbon dioxide atmosphere. The treated oil is then degassed to remove entrained carbon dioxide, filtered to remove particulates and then cooled to provide a refined, bleached soybean oil.

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