FIELD: light industry. SUBSTANCE: method is carried out in two stages. At the first stage the leather waste with a liquid coefficient of 0.75-0.8 is treated by boiling for 15-20 min in an aqueous solution of sulfuric acid and NMK concentrate. At the second stage the reaction mass is boiled with stirring for 50-60 min and treated with a threefold amount of leather waste. Finally, the reaction mass is kept boiling for 3.0-4.0 h. EFFECT: production of highly-concentrated aqueous solutions of proteins with simultaneous reduction of consumption of chemicals and curtailing of the process. 1 tbl
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| METHOD OF TANNING OUT OF COLLAGEN-CONTAINING WASTE OF CHROME TANNING FOR PROTEIN SUBSTANCE PREPARING | 0 |
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