云母钛珠光颜料制备过程中TiCl_4与尿素水解反应动力学

Study on Hydrolysis Dynamics of TiCl_4 and Urea During the Preparation of Titania Coated Mica Pigments

测定均匀沉淀法制备云母钛珠光颜料过程中TiCl4与尿素水解反应浓度的变化规律,建立其水解动力学方程.通过实验研究,得出TiCl4水解反应的级数α为1.3级,其活化能Eα1为284.01kJ/moL;尿素水解反应的级数α为零级,其活化能Eα2为131.03kJ/moL.通过尿素与TiCl4的动力学方程进行分析,得出一次加入尿素,连续加入钛盐的新加料方法.

Determine the concentration of TiCh and urea during preparing mica titania nacreous pigment by adjusting pH with urea, and deduce the reaction dynamics equation. We deduce that a, Eα of TiCl4 is 1.3 and 284.01kJ/moL, and α, Eo of urea is 0 and 131.03 kJ/moL. The analysis of hydrolysis dynamics of TiCl4 and urea educe the new joining method that urea is joined once and titanium salt is joined in succession.