METHOD OF PREPARING TITANIUM TANNING AGENT FOR LEATHER Russian patent published in 1998 - IPC

FIELD: leather industry. SUBSTANCE: method involves preparing the parent titanyl sulfate solution, its stirring and cooling. Then ammonium sulfatotitanyl is desalted by addition of solid ammonium sulfate to solution followed by crystallization, suspension filtration and precipitate treatment. The parent titanyl sulfate solution is obtained by mixing titanium tetrachloride with 82-87% sulfuric acid followed by degassing and dissolving sulfatization product formed in water up to the required concentration by titanium- and sulfate-ions. Process of product degassing and dissolving is carried out to obtain 1-65% sulfatization product in nondissolved state constantly. EFFECT: decreased cost of titanium tanning agent making without its quality deterioration. 2 tbl