Method for clean production of titanium dioxide by using sodium hydroxide

The present invention belongs to the field of preparation and processing of mineral resources inorganic metal compound, particularly relates to a method of using sodium titanium slag and clean production of titanium dioxide (titanium dioxide) in. High slag as the raw material, so that the intermediate reaction product prepared with sodium hydroxide 350 ~ 550 ℃ occurs, washed with water and then the intermediate product (or carbonate), acid, reduction, hydrolysis, calcined anatase or prepared rutile titanium dioxide. A base cycle of the invention, the acid circulation and separation technology significantly reduces energy consumption, simplify the production process, reducing the equipment investment, improve the process operability, to provide the preparation of titanium resources utilization and titania (titanium dioxide) is an effective way.