METHOD OF PROCESSING SHEEPSKINS Russian patent published in 1999 - IPC

FIELD: leather industry. SUBSTANCE: method is designed for production of sheepskins when manufacturing fur intermediate product. Sheepskins are subjected to soak, fleshing, grease removal, and pickle salting. The latter operation is carried out for 5.5-6.6 h using a complex reagent, which is mixture of adipic, glutaric, and succinic acids, their total concentration in solution being 1.8-2.2 g/l. Thereafter, skin is tanned with dry chrome tanner in concentration 0.65-0.75 g/l (calculated for chromium oxide), dubbed, and dried. In such a process, consumption of chromic compounds in tanning operation is more than twice reduced and concentration of these compounds in exhausted liquid is reduced by a factor of 7.5. EFFECT: increased economical efficiency and intensified process. 2 tbl