The sulfuric acid process dominates

　　Titanium dioxide, there are mainly 2 kinds of production methods, namely, sulphuric acid and chloride. Sulfuric acid process began in 1925, by the United States NationalLeadIndustry the earliest application. Chlorination process began in 1932, by the German IG Farben first invented in 1959, the DuPont Co to develop the DuPont process, and built a 100000 tons / year production plant, the chlorination process of industrialization. Relatively speaking, the technical difficulty of chlorination, only a few enterprises to grasp core technology.

　　Overall, Europe remains the sulfuric acid process capacity of the largest area. At present, the world's largest one of the chlorination process titanium dioxide production business to DuPont Co, the annual capacity of 1200000 tons. Domestic titanium dioxide production by sulfuric acid process, the vast majority, only Jinzhou titanium industry (production capacity of 30000 tons / year) by chlorination process, and the technology was originally introduced by International Consulting - joint design mode. In 2010 the domestic titanium dioxide production capacity of 2300000 tons / year calculation, chlorination process accounts for only about 1.5%.