METHOD OF PREPARING CHROMIUM TANNING AGENT

摘要

FIELD: leather and fur production. SUBSTANCE: method comprises dissolving chromichromate at chromium (III) to chromium (VI) oxide ratio of 0.8-1.2 in sulfuric acid till chromium (III) compounds are completely deoli, reducing chromium (VI) present in original chromichromates with inorganic or organic reducing agents, subsequently correcting basicity of chromium compounds to desired value by adding sodium or potassium dichromate and additionally reducing chromium (VI) by adding inorganic and organic reducing agent. EFFECT: improved quality of tanning agent and greater reliability of controlling chromium (VI) reducing process.