METHOD OF TREATING LEATHER MATERIAL Russian patent published in 2012 - IPC C14C1/04 C14C1/08 

FIELD: chemistry.

SUBSTANCE: method of treating leather material, which involves successive two-step soaking with a surfactant-based composition, liming, deliming, softening, pickling and tanning, wherein at the first soaking step, at the second soaking step, as well as at the liming step, the composition used contains surfactants in form of a product of condensation of float tar with triethanolamine, taken in molar ratio (0.8-1.2):1.0, sodium alkylbenzene sulphonate and neonol with average degree oxyethylation 12, water and isopropyl alcohol, also employs sodium carbonate, sodium sulphide and calcium hydroxide depending on the step. All components are taken in a defined ratio.

EFFECT: invention improves quality of material, reduces concentration of toxic sulphides in waste water, enables to use domestically produced chemicals, including oleic acid production wastes, thereby reducing the cost of the process of treating leather material.

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