FIELD: production of pigments and catalysts based on titanium dioxide, in particular, process for treatment of titanium dioxide for removal of sulfur, in particular sulfates.
SUBSTANCE: method involves treating calcined titanium dioxide at elevated temperatures using aqueous solution containing one or more ammonium compounds; separating titanium dioxide from aqueous solution and drying titanium dioxide. Ammonium compounds preferably used in treatment process are ammonium acetate or ammonium chloride.
EFFECT: increased efficiency in cleaning of titanium dioxide from sulfur, in particular sulfates.
9 cl, 5 tbl, 5 ex
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