云母钛脱水脱硫过程的动力学研究  

Kinetics of Dehydration and Desulfation Process of Titania Coated Mica

作　　者：周静红[1] 肖文德[1] 顾燕芳[2] 古宏晨[2] 胡黎明[2] 

机构地区：[1]华东理工大学联合化学反应工程研究所,上海200237 [2]华东理工大学国家超细粉末工程中心

出　　处：《高等学校化学学报》1997年第3期439-443,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：对强制水解硫酸钛制得的云母钛前驱体进行TG分析，利用Freeman－Carroll方法处理热重数据，得到云母钛热处理的动力学参数．脱水阶段：E=93．32kJ／mol，n=5．16，A=5.31×1O11min-1；脱硫阶段：E=149．25kJ／mol，n=5．13，A=2．75×1011min－1．相同条件下制得的水合氧化钛粉末的动力学参数表明，云母钛中水含氧化钛膜层的脱水、脱硫速率均慢于水合氧化钛粉末的脱水脱硫速率．Based on TG curve, the Freeman-Carroll method was applied to calculate the kinetic parameters of the process of dehydration and desulfation of hydrous titanium oxide film on the titania-coated mica pearl pigments. As a result, the kinetic parameters were obtained.The dehydration period: E=93. 32 kJ/mol, n= 5. 16, A= 5. 31×10ll min-1; desulfation period: E= l49. 25 kJ/mol, n = 5. 13, A = 2. 75× 1011 min-1. Simultaneously, comparing with the kinetic parameters of the hydrous tiania powder obtained under the same condition indicated that both the dehydroation process and the desulfation process were more difficult in pigments than in powder'

关 键 词：云母钛 水合二氧化钛 脱水 脱硫 转相 颜料 

分 类 号：TQ620.64[化学工程—精细化工]