Effects of Hydrolysis Conditions on Rutile Titanium White Pigment Prepared by Low Concentration of Titanyl Sulfate Solution
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摘要: 以低浓度工业钛液为水解原料,通过自生晶种热水解硫酸法工艺制备出金红石型颜料钛白。考察底水量、加料速率和熟化时间对金红石型钛白粒子形貌、粒径分布及颜料性能的影响,并采用粒度测试、SEM、XPS、TEM及颜料性能测试对所制备的样品进行了表征。结果表明:最佳的水解操作条件为底水量22%、加料速率8.3 r/min和熟化时间30 min,所得金红石型钛白粒度适宜、粒度分布较窄,颜料性能优良;水解条件对颜料钛白性能影响顺序为:底水量>加料速率>熟化时间。Abstract: 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.
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