Titanium dioxide is naturally presented in titanium ore and rutile titanium. Its molecular structure makes it contain high luminance and covering property. But it must be subject to first extraction and purification. 60 years ago, the DuPont Company had developed the chlorination process as the production technology of titanium dioxide. Because of its relative old sulfuric acid process, it is capable of manufacturing high-quality paint products while reducing environmental emissions and energy consumption and therefore has become the preferred technique in the world.Titanium dioxide (or TiO2) is the most widely used white pigment in the field of industry, being used in architecture, industry and automotive coatings; furniture, electrical appliances, plastic tape and plastic box-purpose plastic; high-grade magazines, publicity pictures and paper for attached film as well as specialty product such as ink, rubber, leather and elastomers.