(DE19543204-A1)      A nano-dispersed titanium dioxide has a maximum particle size distribution, determined by an ultracentrifuge, of 1-10 nm, less than 0.1 wt.% carbon in the form of organic compounds or residues, and transparency at least 99%, determined in a 5 wt.% aqueous HCl solution of 400-700 nm in 180 degrees/d-geometry in a layer of thickness 10m.    USE -   The nano-dispersed TiO2 is used as protective component against UV in cosmetics, synthetics, silicone resins and lacquers, in the UV-catalysed breakdown of polymers and organic pollutants in waste water, and as TiO2 component in dye solar cells (claimed), and as component in special glasses, with SiO2 prepared in the same way.    ADVANTAGE -   The nano-dispersed TiO2 is easily prepared on the industrial scale, has the same favourable properties (fineness, and transparency) as a sol-gel product, and can be stored for some weeks at 0C without change.    (JP9165218-A)      A nano-dispersed titanium dioxide has a maximum particle size distribution, determined by an ultracentrifuge, of 1-10 nm, less than 0.1 wt.% carbon in the form of organic compounds or residues, and transparency at least 99%, determined in a 5 wt.% aqueous HCl solution of 400-700 nm in 180 degrees/d-geometry in a layer of thickness 10m.    USE -   The nano-dispersed TiO2 is used as protective component against UV in cosmetics, synthetics, silicone resins and lacquers, in the UV-catalysed breakdown of polymers and organic pollutants in waste water, and as TiO2 component in dye solar cells (claimed), and as component in special glasses, with SiO2 prepared in the same way.    ADVANTAGE -   The nano-dispersed TiO2 is easily prepared on the industrial scale, has the same favourable properties (fineness, and transparency) as a sol-gel product, and can be stored for some weeks at 0C without change.    (DE19543204-C2)      A nano-dispersed titanium dioxide has a maximum particle size distribution, determined by an ultracentrifuge, of 1-10 nm, less than 0.1 wt.% carbon in the form of organic compounds or residues, and transparency at least 99%, determined in a 5 wt.% aqueous HCl solution of 400-700 nm in 180 degrees/d-geometry in a layer of thickness 10m.    USE -   The nano-dispersed TiO2 is used as protective component against UV in cosmetics, synthetics, silicone resins and lacquers, in the UV-catalysed breakdown of polymers and organic pollutants in waste water, and as TiO2 component in dye solar cells (claimed), and as component in special glasses, with SiO2 prepared in the same way.    ADVANTAGE -   The nano-dispersed TiO2 is easily prepared on the industrial scale, has the same favourable properties (fineness, and transparency) as a sol-gel product, and can be stored for some weeks at 0C without change.    (US5840111-A)      A nano-dispersed titanium dioxide has a maximum particle size distribution, determined by an ultracentrifuge, of 1-10 nm, less than 0.1 wt.% carbon in the form of organic compounds or residues, and transparency at least 99%, determined in a 5 wt.% aqueous HCl solution of 400-700 nm in 180 degrees/d-geometry in a layer of thickness 10m.    USE -   The nano-dispersed TiO2 is used as protective component against UV in cosmetics, synthetics, silicone resins and lacquers, in the UV-catalysed breakdown of polymers and organic pollutants in waste water, and as TiO2 component in dye solar cells (claimed), and as component in special glasses, with SiO2 prepared in the same way.    ADVANTAGE -   The nano-dispersed TiO2 is easily prepared on the industrial scale, has the same favourable properties (fineness, and transparency) as a sol-gel product, and can be stored for some weeks at 0C without change.    (EP774443-B1)      A nano-dispersed titanium dioxide has a maximum particle size distribution, determined by an ultracentrifuge, of 1-10 nm, less than 0.1 wt.% carbon in the form of organic compounds or residues, and transparency at least 99%, determined in a 5 wt.% aqueous HCl solution of 400-700 nm in 180 degrees/d-geometry in a layer of thickness 10m.    USE -   The nano-dispersed TiO2 is used as protective component against UV in cosmetics, synthetics, silicone resins and lacquers, in the UV-catalysed breakdown of polymers and organic pollutants in waste water, and as TiO2 component in dye solar cells (claimed), and as component in special glasses, with SiO2 prepared in the same way.    ADVANTAGE -   The nano-dispersed TiO2 is easily prepared on the industrial scale, has the same favourable properties (fineness, and transparency) as a sol-gel product, and can be stored for some weeks at 0C without change.