粗硼砂的氯化铵溶液浸提动力学(英文)  

Leaching Kinetics of Tincal in Ammonium Chloride Solutions Aycan

作　　者：Aycan Gür Mehem Kandilcik 

机构地区：[1]Yuzuncu Yil大学文理学院化学系,Van 65080,土耳其

出　　处：《无机化学学报》2009年第5期767-773,共7页Chinese Journal of Inorganic Chemistry

基　　金：Supported by Yuzuncu Yil University Foundation.

摘　　要：研究了反应温度、溶液浓度、固液比、固体粒径大小和搅拌速度对氯化铵溶液浸提粗硼砂(十水四硼酸钠,Na2B4O7.10H2O)动力学的影响。结果表明反应速率随反应温度、溶液浓度的增加和固体粒径、固液比的减小而增加,但搅拌速度对溶解速率无显著影响。根据均相和多相动反应力学模型研究了粗硼砂的溶解过程。结果表明溶解速率遵从假一级均相反应模型。粗硼砂在氯化铵溶液中溶解的活化能为82.73 kJ.mol-1。The effects of reaction temperature, solution concentration, solid to liquid ratio, particle size and stirring speed were investigated on leaching kinetics of tincal, sodium tetraborate decahydrate（Na2B4O7· 10H2O）, in ammonium chloride solutions. The results showed that the dissolution rate increased with increasing solution concentration and reaction temperature, and increased with decreasing particle size and solid to liquid ratio. It was also determined that stirring speed had no significant effect on dissolution rate. The dissolution process was examined according to homogeneous and heterogeneous reaction kinetic model. The dissolution rate was found to be based on the first order pseudo homogeneous reaction model. The activation energy of the dissolution of tincal in ammonium chloride solutions was determined to be 82.73 kJ·mol^-1.

关 键 词：硼矿石 粗硼砂 氯化铵 浸提动力学 硼酸 

分 类 号：O613.81[理学—无机化学]