TITANIUM OXIDE SOL AND PROCESS FOR PRODUCING SAME, ULTRAFINE PARTICULATE TITANIUM OXIDE, PROCESS FOR PRODUCING SAME, AND USES OF SAME

摘要

The present invention relates to a method for producing titanium oxide sol, comprising mixing an aqueous titanium tetrachloride solution into water at a temperature of 80°C or higher within 60 seconds while maintaining the mixed solution at the temperature and cooling it to less than 60°C within 15 minutes after the mixing is completed in a method for producing titanium oxide sol by the hydrolysis of titanium tetrachloride in the liquid phase method; the highly-dispersive ultrafine particulate titanium oxide sol obtained by the method, wherein an average primal particle diameter (D BET ) calculated from the BET specific surface area is 3 to 8 nm, the cumulative 50% volume particle diameter (D50 DLS ) measured by the dynamic light scattering method and D BET have the relationship represented by D50 DLS = k x D BET (k in the formula is a value of 1 or more and less than 5) and the anatase content is 70% or more; the ultrafine particulate titanium oxide obtained by drying the titanium oxide sol; and the production method and use thereof. The ultrafine particulate titanium oxide according to the present invention is suitable for use in the photocatalyst, solar cell, dielectric material, material for the electrode of lithium ion batteries, and the like without requiring specific pulverizing treatment or dispersing agent and has a great value industrially.