GRANULAR TITANIUM DIOXIDE AND ITS PRODUCION

摘要

PURPOSE: To produce a granular titanium dioxide useful as a Ti starting material for a metallic compd. and ceramic, low in adhesion property and having excellent flow property. CONSTITUTION: The granular titanium dioxide has 25-100μm average grain size and 1-50m<2> /g specific surface area. The granular titanium dioxide is obtained by burning a crystallized mater obtained by heating and crystallizing after adding a hydrated titanyl sulfate crystal or granular titanium dioxide as a base material to a titanyl sulfate soln. having 30-140g/l TiO2 concn. and 800-1150g/l sulfuric acid concn. and whose wt. ratio of H2 SO4 /TiO2 is adjusted to 8-30 or to the titanyl sulfate soln. adjusted to a prescribed concn. at 700-1200 deg.C.