公开(公告)号：EP3904293A1

公开(公告)日：2021-11-03

申请号：EP20759668.5

申请日：2020-02-13

申请人： Showa Denko K.K.

发明人： CHIKAMI Hideaki ,  MIZUE Kei ,  KOGOI Hisao

IPC分类号： C01G23/053

摘要： The present invention provides a method of producing titanium oxide capable of maintaining a high content of an anatase form crystal phase at a low cost even under a high temperature environment. The method of producing titanium oxide includes a step of synthesizing titanium oxide by using an aqueous solution obtained by dissolving titanium tetrachloride and an α-hydroxycarboxylic acid having 3 carboxy groups as a reaction liquid and bringing the reaction liquid to a reaction temperature of 60°C or higher and the boiling point of the reaction liquid or lower, wherein the ratio of the amount (mol) of the α-hydroxycarboxylic acid to the amount (mol) of Ti in the reaction liquid is 0.006 or more and 0.017 or less, and the concentration of Ti in the reaction liquid is 0.07 mol/L or more and 0.70 mol/L or less.