Methods and compositions for purifying edible oil
AssigneeSelecto Scientific, Inc.
InventorsEhud Levy, Cang Li, Mohammed Tazi
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Abstract
The invention relates to methods and compositions for removing contaminants from edible cooking oils. Reduction in the accumulation of contaminants such as polar materials, free fatty acids, metals, color bodies, and soaps is achieved by treating the oil with a composition containing effective amounts of silica, acidic alumina, clay and citric acid. Removal of contaminants from oil according to the methods and compositions of the invention improves the quality of the oil and reduces costs as well as various health and safety concerns associated with the production of fried foods.
Claims44
A process for removing contaminants from cooking oil comprising the steps of:
- a) contacting the oil with a composition comprising silica, acidic alumina, clay, and optionally citric acid;
- and
- b) separating the composition from the oil.
A process for removing contaminants from cooking oil comprising the steps of:
- a) contacting the oil with a composition comprising about 40% to about 50% silica hydrogel, about 5% to about 15% acidic alumina having a pH of about 2 to about 4 and pores having a diameter of about 40 to about 500 Angstroms, about 15% to about 35% activated clay, and about 2% to about 10% citric acid, wherein all percentages are by weight based on the total composition;
- b) heating the oil and composition mixture to a temperature of about 280° F. to about 360° F.;
- c) mixing the oil and composition mixture for about 1 to about 10 minutes;
- and
- c) separating the composition from the oil.
A composition for removing contaminants from cooking oil comprising silica, acidic alumina, clay, and citric acid, wherein each of the silica, acidic alumina, clay, and optionally citric acid are present in an effective amount to remove one or more contaminants selected from polar materials, free fatty acids, metals, color bodies, or soaps.
A composition for removing contaminants from cooking oil comprising about 40% to about 50% silica hydrogel, about 5% to about 15% acidic alumina having a pH from about 2 to about 4 and having pores with a diameter of about 40 to about 500 Angstroms, about 15% to about 35% activated clay, and about 2% to about 10% citric acid, wherein the composition removes one or more contaminants selected from polar materials, free fatty acids, metals, color bodies, or soaps.
Dependencies are inferred from the claim text.