| 摘要 |
PURPOSE:To obtain titanium oxide with superb catalyst function by thermally treating a suspension of titanium oxide which contains rutile-type titanium oxide fine particles. CONSTITUTION:Titanium tetrachloride is neutralized at room temperature by dripping one liter of 200g/liter aqueous solution of titanium tetrachloride into two liters of 222g/liter aqueous solution of sodium carbonate, with a concurrent stirring action. Further, five wt.% of citric acid based on the weight of TiO2 in a neutralization sediment is added to the aqueous solution. Then the aqueous solution is heated at 70 deg.C and is matured for 20 minutes. Next, a product thus obtained (titanium oxide containing rutile-type titanium oxide fine particles) is filtered, and, after cleaning is dispersed in water to obtain 100g/liter of suspension in terms of TiO2. In addition, after the pH value becomes 1.0 by adding an aqueous solution of hydrochloric acid to the suspension, it is thermally treated under the reflux at 95 deg.C for six hours, so that the titanium oxide in enhanced in catalytic function. |
