碳酸锂结晶动力学研究  

Crystallization kinetics of lithium carbonate

作　　者：伊文涛[1] 闫春燕[1] 马培华[2] 李法强[2] 

机构地区：[1]枣庄学院化学化工系,山东枣庄277160 [2]中国科学院青海盐湖研究所,青海西宁810008

出　　处：《化学工程》2009年第12期16-19,共4页Chemical Engineering(China)

基　　金：国家"十五"科技攻关计划滚动支持项目(2004BA602B-01)

摘　　要：为了更好地指导生产,采用无蒸发恒容间歇反应器对Li2CO3自LiHCO3溶液中的结晶动力学进行了研究。实验结果表明,温度的升高及质量浓度的增大能显著提高结晶速率,低的系统压力及搅拌有利于结晶反应的进行。根据实验数据拟合得到了该结晶过程的宏观动力学方程。晶体的生长机制表明,扩散控制机制是Li2CO3自LiHCO3溶液中生长的主导机制。In order to further guide the production the crystallization kinetics of Li2CO3 from LiHCO3 solutions was studied by a non-evaporation volume-constant batch reactor. The experimental results show that the crystallization rate increases with increasing the initial mass concentration and temperature. In addition, low system pressure and agitation rate are favorable to the crystallization reaction. The macro-kinetics of this crystallization process is fitted with the experimental data. The analysis of the crystal growth mechanism indicates that the diffusion mechanism is dominant for Li2CO3 growth from LiHCO3 solutions.

关 键 词：结晶 动力学 碳酸锂 晶体生长机制 

分 类 号：O781[理学—晶体学]