FIELD: industrial inorganic synthesis.
SUBSTANCE: invention is directed to production of dispersed titanium dioxide via vapor-phase hydrolysis of titanium tetrachloride. Process comprises combusting natural gas in air atmosphere, supplying titanium tetrachloride and water to reaction zone, performing thermal hydrolysis operation, separating titanium dioxide from gaseous products, and subsequent treatment of gaseous reaction products in several steps. Gaseous products are first treated with calcium chloride solution to produce titanium dioxide slurry, which is then filtered. Resulting precipitate is rinsed, dried, and ground to form commercial titanium dioxide. Gaseous products are further treated with calcium hydroxide suspension to form commercial calcium chloride.
EFFECT: reduced loss of titanium dioxide with gaseous products and additionally enabled production of calcium chloride so that environmental pollution is also reduced.
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