METHOD OF PROCESSING SHEEPSKINS Russian patent published in 2012 - IPC C14C1/04 

FIELD: process engineering.

SUBSTANCE: proposed method comprises raw stock soaking, washing, shearing, fleshing, deoiling by water solution in the presence of anionic surfactant at 42°C, "ЖК" 7, pickling and tanning-oiling by water composition containing sodium chloride, chromium tanning agent and fat emulsion. Proposed composition comprises additionally the mix of nonionic surfactant and chloride alkyl dimethyl benzene ammonium at the ratio of 60-70:30-40 in amount of 0.5-1.0 g/l. Note here that processing is performed for 70-90 min. Composition for tanning-oiling comprises the mix of nonionic surfactant and isopropanol at the ratio of 90:10 in amount of 0.5-1.5 g/l while oiling agent ''Talis'' is used in amount of 4-5 g/l.

EFFECT: higher operating properties.

1 tbl, 4 ex