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    • 8. 发明专利
    • PRODUCTION OF RUTILE TYPE TITANIUM OXIDE SOL
    • JPH02255532A
    • 1990-10-16
    • JP7892889
    • 1989-03-30
    • CATALYSTS & CHEM IND CO
    • TANAKA HIROKAZUHIRAOKA HIDEYASU
    • C01G23/053C01G23/047
    • PURPOSE:To obtain the title sol which is excellent in dispersibility and is also excellent in long-term stability and light resistance by heating a soln. prepd. by dissolving the gel or sol of titanium hydroxide in hydrogen peroxide in the presence of a specific ratio of a tin compd. CONSTITUTION:An alkali is added to an aq. sol. of a Ti salt, such as titanium chloride, to neutralize the soln. and the soln. is washed to obtain the titanium hydroxide gel. The aq. soln. of the Ti salt is otherwise passed through an ion exchange resin to remove anions therefrom or to hydrolyze the titanium alkoxide to obtain the titanium hydroxide sol. The hydrogen peroxide is added to the resulted gel or sol or the mixture composed of both to dissolve the titanium hydroxide. The uniform aq. soln. is thus prepd. The tin compd. (tin salt, such as tin chloride, stannic acid salt, such as potassium stannate, the oxide or hydroxide of tin) is added to this aq. soln. at a ratio of TiO2/SnO2=1.5 to 14 (by weight) and thereafter, the soln. is heated and is thereby hydrolyzed. The rutile type titanium oxide sol is thus obtd.