Effects of Concentration of TiOSO sub(4) and Fe/TiO sub(2) Ratio on TiO sub(2) Anatase White Pigment Production via Short Sulfate Process

Using unconcentrated TiOSO sub(4) solution from sulfate process as titanium source, anatase TiO sub(2) white pigment was prepared by self-generating seed thermal hydrolysis route via short sulfate process. The effects of concentration of TiOSO sub(4) solution and Fe/TiO sub(2) ratio on the structure and pigment properties of the TiO sub(2) white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The concentration of TiOSO sub(4) solution and Fe/TiO sub(2) ratio had great effects on the super-saturation of TiO super(2+), crystal formation, nucleation, crystallization and aggregation process, eventually determined the crystal structure, particle size distribution and its pigment properties. The optimized concentration of TiOSO sub(4) solution was of 195 g/L, and the Fe/TiO sub(2) ratio was at 0.30. The as-prepared anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.