METHOD OF PREPARING TiO DISPERSIONS IN FORM OF NANOPARTICLES, DISPERSIONS PREPARED USING SAID METHOD, AND USE OF TiO DISPERSIONS TO ENDOW SURFACES WITH CERTAIN PROPERTIES Russian patent published in 2010 - IPC C01G23/53 C03C17/25 A61K8/29 B01D53/86 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention can be used to prepare dispersions of titanium dioxide nanoparticles suitable for photocatalytic coatings on surfaces, for photocatalytic disinfection of gases and liquids and for preparing cosmetic compositions with high degree of skin protection from the sun. The method of preparing dispersions of anatase nanoparticles involves the following steps: i) reaction of titanium alkoxide with a complexing solvent selected from a group consisting of ethylene glycol, diethylene glycol or polyethylene glycol; ii) distillation of the solution obtained at step i) to a small volume; iii) addition of water of to the solution obtained at step ii) together with the above mentioned complexing solvent and one or more polycondensation inhibitors, and then heating the reaction mixture with a reflux condenser. The polycondendation inhibitor consists of a mixture which contains at least one inorganic acid and one organic acid. The amount of inorganic acid ranges from 0.1 to 10% of the total volume of the reaction mixture and the amount of organic acid ranges from 1 to 20 vol %.

EFFECT: invention increases stability of dispersions of anatase nanoparticles.

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