Refining of edible oil retaining maximum antioxidative potency

• Main Authors: SILKEBERG, ALF, KOCHHAR, PARKASH S
• Format: Patent
• Language: English; French; German
• Published: 18.08.1999
• Edition: 6
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; BAKERY PRODUCTS; BAKING; CANDLES; CHEMISTRY; CHEWING GUM; COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; CONFECTIONERY; DETERGENTS; EDIBLE DOUGHS; EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKINGOILS; ESSENTIAL OILS; FATTY ACIDS THEREFROM; FOODS OR FOODSTUFFS; FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J; HUMAN NECESSITIES; ICE-CREAM; METALLURGY; PERFUMES; PREPARATION THEREOF; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL; PRESERVATION THEREOF; PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; TREATMENT, e.g. PRESERVATION, OF FLOUR OR DOUGH, e.g. BYADDITION OF MATERIALS

This invention relates to A process for refining edible crude oil, selected from the group of oil comprising sesame seed oil, ricebran oil, wheat germ oil, oat germ oil and coffee oil, tee seed oil, pine seed oil, rich in natural antioxidative potential; the process being dedicated to retaining a substantial amount of the original antioxidative potential in the refined oil, modifying the degumming, the neutralisation, the bleaching and the deodorisation refining steps, comprising (a) lower temperature than usual and the addition of 50-500 mg/kg citric acid solution in the degumming process and (b)eliminating or substantially minimising hot water washing in the neutralising process and (c) eliminating or substantially reducing the use of caustic or acid clay, which is replaced by amorphous silica gel with a moisture of at least 25 % and an average pore diameter of between 20 and 60 Angstroms in the bleaching process and (d) either replacing the deodorisation process by the use of inert gas or making a short deodorisation with substantially lower heat (120-150 DEG C instead of the usual 210-270 DEG C).