碳酸钠脱除湿法磷酸中氟的反应动力学研究  

Study on the reaction kinetics of defluorination of wet-process phosphoric acid with sodium carbonate

作　　者：蒋丽红[1] 纳海英[1] 陈雪萍[1] 

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500

出　　处：《化工科技》2012年第3期30-32,共3页Science & Technology in Chemical Industry

基　　金：云南省重点学科建设项目

摘　　要：采用碳酸钠为脱氟剂,研究了湿法磷酸的脱氟反应动力学,研究结果显示碳酸钠脱氟反应为二级反应,反应速率常数与温度的关系为k=0.248 7exp(-3 455.8/T),反应活化能为28.73kJ/mol。动力学方程可靠性较好,25℃及30℃下动力学方程计算值与实验值的相对误差小于2%,40℃下动力学方程计算值与实验值的相对误差小于7%。The defluorination reaction kinetics of the wet-process phosphoric acid was studied,sodium carbonate was used as defluorination agent. The results showed that defluorination reaction of sodium carbonate was second-order reaction. The relationship between the reaction rate constant and temperature was k=0. 248 7exp（--3 455.8/T）,and the reaction activation energy was 28. 73 kJ/mol. The kinetic equation was reliable,the relative error between the calculated values of the kinetic equation and experimental values was less than 2% at 25 ℃ and 30 ℃ ,and less than 7% at 40 ℃.

关 键 词：碳酸钠 湿法磷酸 脱氟 动力学 

分 类 号：TQ126.3[化学工程—无机化工]