METHOD FOR OBTAINING OF PROTEIN PRODUCT FROM GRAIN PROCESSING WASTES Russian patent published in 2006 - IPC A23J1/12 A23J3/30 A23J3/32 

FIELD: food-processing industry, in particular, protein production.

SUBSTANCE: method involves providing alkaline extraction of raw material; separating extract from small shot; separating starch-protein fraction and protein product from extract, followed by neutralization and washing thereof; introducing citric acid at extraction stage, said citric acid being used in an amount of 0.05-0.2% by weight of extractant, followed by neutralization and washing of protein product with water or 0.2-0.3%-solution of sorbic or benzoic acid, or, otherwise, introducing citric acid at protein product washing stage in an amount of 0.5-2.0% by weight of washing water.

EFFECT: improved quality and functional properties of protein product, increased storage life and reduced content of heavy metals in protein product.

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