Influence of hydrolysis in sulfate process on titania pigment producing

作     者：田从学 杜剑桥 陈新红 马维平 罗志强 程晓哲 胡鸿飞 刘代俊 

作者机构：Panzhihua Iron and Steel Research InstitutePangang Group School of Chemical EngineeringSichuan University 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2009年第19卷第S3期

页      面：829-833页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Project (YK08T02) supported by Pangang Group 

主　　题：titanyl sulfate hydrolysis F value pre-adding water heating rate 

摘      要：Using industrial titanyl sulfate solution as feedstock, titania white pigment was prepared by self-generated seeded thermal hydrolysis method. The influence of some factors (such as F value, volume ratio of pre-adding water to TiOSO4, heating rate and pH of pre-adding water) on the structure and pigment properties of the as-prepared slurry metatitanic acid and titania samples were studied. The samples were characterized by XRD, particle size distribution, SEM and pigment properties test. The results show that all samples show anatase phase, and the calcined samples prepared under suitable conditions are with narrow particle size distribution and good pigment properties. All these influencing factors have great impacts on the hydrolysis velocity, nucleation rate, crystal growth rate, particle size distribution, crystal structure and pigment properties. The suitable F value is 1.73-1.93, the volume ratio of pre-adding water and TiOSO4 solution is 0.28-1, the optimum heating rate is 0.94-1.33 ℃ /min and pH of the pre-adding water should be at near-neutral range.