METHOD OF PRODUCING PROTEIN HYDROLYSATE Russian patent published in 2013 - IPC C08H1/06 A23J1/10 

FIELD: chemistry.

SUBSTANCE: invention relates to the leather industry and can be used in treating raw wastes to obtain an ecologically clean protein hydrolysate rich in macro- and microelements of bischofite, for use in medicine, in producing cosmetic products, as a feed additive for cattle and an organomineral additive for top dressing. In the method of producing a protein hydrolysate by washing and treating raw wastes from leather production, treatment is carried out in two steps. At the first step, wastes are treated with an extractive solvent selected from a group of esters, at boiling point of the solvent, followed by drying. At the second step, the wastes are treated with unsaturated steam obtained by boiling 1-32% aqueous bischofite solution.

EFFECT: obtaining an ecologically clean protein hydrolysate with quantitative output and wider field for practical use thereof.

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