Patent ID: 7790138

Claim:
A process for the manufacture of TiO 2 /SiO 2 mixed oxides or the hydrates and/or oxide hydrates thereof comprising 0.5 to 95 wt % Si, referring to the total Ti and Si and calculated as SiO 2 and TiO 2 , respectively, comprising: contacting a titanium compound or the hydrolysis product thereof with a silicic acid compound in an aqueous medium, wherein the titanium compound comprises a titanium alcoholate having at least one C 1 - to C 16 alcoholate group, the silicic acid compound comprises an aqueous silicic acid sol, the silicic acid compound in aqueous solution has an average particle size of 1.8 to 3.0 nm, and the silica acid sol has a viscosity of less than 10 mPas at 25° C.; and hydrolyzing the titanium compound.