METHOD FOR PROTEIN AND FAT EXTRACTION FROM COLLAGEN-CONTAINING RAW MATERIALS Russian patent published in 2015 - IPC A23J1/10 A23J3/04 B01D11/00 C11B1/00 

FIELD: food industry.

SUBSTANCE: collagen-containing raw materials are frozen to a temperature no higher than minus 10°C and no lower than18°C. The raw materials are milled till sides size is equal to 2-7 mm, dehydrated and defatted with dimethyl ether under a pressure by way of raw materials placement in the extractor. The extractor filling coefficient is to be no more than 70% of the extractor volume. Raw materials are vacuumised in the extractor at vacuum depth no less than 0.1 atm; then dimethyl ether is pumped into the extractor for creation of pressure in the system no less than 1 atm and no more than 10 atm. Extraction lasts 60-120 minutes. Then one removes dimethyl ether, drains fat and water that are delivered for separation for components dividing. The defatted and dehydrated raw materials remaining in the extractor are steamed during 30-70 minutes with 105-115°C acute steam. After steaming completion the raw material temperature is not to be more than 40°C. Then the defatted and dehydrated raw materials are delivered for milling till powdery condition.

EFFECT: obtainment of protein and fat from the collagen-containing raw materials where the produced protein composition without foreign smells, with smell and colour specific to such kinds of products, has high values of moisture-binding and fat-retentive capability; during hydration and further thermal treatment stable and steady gels are formed.

1 tbl, 4 ex