FISH LIVER OIL PRODUCTION METHOD Russian patent published in 2013 - IPC C11B1/00 

FIELD: food industry.

SUBSTANCE: invention relates to fish industry. The method envisages fish liver milling, mixing with water and a proteolytic enzyme preparation, thermal treatment and fat isolation. Before milling liver is treated with a 0.3% antioxydant solution and frozen, then the liver is unfrozen till the temperature inside the liver is equal to minus 1°C - minus 5°C and milled till formation of particles sized 2-5 mm. After milling the milled liver temperature is conditioned to 45-50°C and fermentolysis is implemented. The enzyme preparation is represented by vegetal origin enzyme Corolase L10 in an amount of 0.05-0.1% of the raw material weight. Then one performs fat isolation by way of centrifuging and separation with subsequent adsorption purification of fat at a temperature of 20°C - 50°C under vacuum of 60-80 kPa. During purification one uses highly active bleaching earths in an amount of 0.15% - 3% of the fat weight After purification one performs filtration.

EFFECT: invention allows to increase fat yield by more than 85%, the fat having high indices of polyunsaturated fatty acids content.

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