Effects of Pre-Adding Water Volume Ratio on Rutile White Pigment Production via Sulfate Short Process

Abstract

Using unconcentrated industrial TiOSO4 solution as raw material, rutile TiO2 white pigment was prepared via the self-seeded thermal hydrolysis sulfate process. The effects of pre-adding water volume ratio on the hydrolysis process and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The pre-adding water volume ratio had great effects on the quantity and active of seed crystal, hydrolysis process, eventually determined particle size distribution and its pigment properties. The optimized pre-adding water volume ratio was of 0.22. The as-prepared rutile white pigment was with appropriate particle size, narrow particle size distribution and good pigment properties.