SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (4): 630-634.

• • 上一篇    下一篇

The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

鲍丽, 张廷安, 刘燕, 豆志河, 吕国志, 王晓民, 马佳, 蒋孝丽   

  1. Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • 收稿日期:2009-09-02 修回日期:2010-07-05 出版日期:2010-08-28 发布日期:2010-08-28
  • 通讯作者: ZHANG Ting'an, E-mail:zta2000@163.net
  • 基金资助:
    Supported by the Research Fund for the Doctoral Program of Higher Education(20050145029);the Science and Technology Talents Fund for Excellent Youth of Liaoning Province(2005221012)

The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

BAO Li, ZHANG Ting'an, LIU Yan, DOU Zhihe, L麲uozhi, WANG Xiaomin, MA Jia, JIANG Xiaoli   

  1. Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2009-09-02 Revised:2010-07-05 Online:2010-08-28 Published:2010-08-28

摘要: Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH solution are studied.The sample,the mixture of synthetic gibbsite and sodium hydroxide solution,was scanned in high-pressure differential scanning calorimetry (DSC) equipment with the heating rate of 10 K·min-1. Integral equation and differential equation of non-isothermal kinetics were solved to fit the data related to DSC curve.According to the calculation results,the most probable mechanism function for pure synthetic gibbsite dissolution in sodium hydroxide solution is presented based on the optimum procedure in the database of the mechanism function.The apparent activation energy obtained is (75±1) kJ·mol-1,the frequency factor is 10;1mol·s-1,and the reaction is a second order reaction.

关键词: gibbsite, kinetic parameter, mechanism function, integral equation, differential equation

Abstract: Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH solution are studied.The sample,the mixture of synthetic gibbsite and sodium hydroxide solution,was scanned in high-pressure differential scanning calorimetry (DSC) equipment with the heating rate of 10 K·min-1. Integral equation and differential equation of non-isothermal kinetics were solved to fit the data related to DSC curve.According to the calculation results,the most probable mechanism function for pure synthetic gibbsite dissolution in sodium hydroxide solution is presented based on the optimum procedure in the database of the mechanism function.The apparent activation energy obtained is (75±1) kJ·mol-1,the frequency factor is 10;1mol·s-1,and the reaction is a second order reaction.

Key words: gibbsite, kinetic parameter, mechanism function, integral equation, differential equation