METHOD FOR PRODUCING SMALL SIZE TITANIUM OXIDE PARTICLES

摘要

The present invention provides a method for the production of small-size titanium oxide particles, comprising the steps of: e) providing a solid containing titanic acid; f) contacting the solid with an acidic aqueous medium thereby forming an aqueous precursor solution at given conditions of temperature lower than 100 °C, Titanium cation concentration lower than 20wt% and higher than 0.1wt%, pH lower than 1 and strong acid concentration higher than 2.5 % and lower than 30 %; g) optionally, adding one or more capping agents to the aqueous precursor solution; and h) modifying at least one of the conditions of the aqueous precursor and maintaining the aqueous precursor at the modified conditions, whereupon precipitation of a precipitate comprising small-size titanium oxide particles takes place, the modifications being selected from at least one of temperature elevation by at least 5 °C and pH elevation by at least 0.1 pH units.