Effects of Hydrolysis Conditions on Rutile Titanium White Pigment Prepared by Low Concentration of Titanyl Sulfate Solution

The rutile titanium white pigment was prepared by thermal hydrolysis sulfate process without adding external seed crystals,using low concentration of industrial titanyl sulfate solution as raw material.The effects of pre-adding water,feed rate and aging time on particle morphologies,particle size distributions and pigment properties of the rutile titanium white were investigated,and the samples were characterized by particle size distribution test,SEM,XPS,TEM and pigment properties test.The results show that the optimal hydrolysis conditions are 22% of the pre-adding water,8.3 r/min of feed rate and 30 min of aging time,and the obtained rutile titanium white has suitable particle size,narrow particle size distribution and excellent pigment properties.The effect order on the pigment performances is:preadding water>feed rate>aging time.