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›› 2014, Vol. 14 ›› Issue (6): 955-960.

• 过程与工艺 • 上一篇    下一篇

草酸浸出Na8Ti5O14制备草酸氧钛钠的工艺

杜志华 杨轩 张绘 齐涛 宋宁 谢刚 王硕 郭九吉   

  1. 昆明理工大学冶金与能源工程学院 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所绿色过程与工程重点实验室 昆明理工大学冶金与能源工程学院 昆明冶金研究院 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室 中国科学院过程工程研究所
  • 收稿日期:2014-09-01 修回日期:2014-10-29 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: 杜志华

Synthesis of Sodium Titanyl Oxalate Trihydrate by Leaching of Na8Ti5O14 with Oxalic Acid

DU Zhi-hua YANG Xuan ZHAO Hui QI Tao SONG Ning XIE Gang WANG Shuo GUO Jiu-ji   

  1. Department of Physical Chemistry of Metallurgy, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Institute of Process Engineering, Chinese Academy of Science National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Department of Physical Chemistry of Metallurgy, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Department of Metallurgy, Kunming Metallurgical Research Institute National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Processing Engineering, Chinese Academy of Science
  • Received:2014-09-01 Revised:2014-10-29 Online:2014-12-20 Published:2014-12-20
  • Contact: DU Zhi-hua

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摘要： 用草酸浸出多钛酸钠Na8Ti5O14，获得含钛料液，通过蒸发结晶成功制备了纯度99%的草酸氧钛钠产品，对产物进行了表征，考察了反应温度、反应浓度、反应时间、搅拌强度对钛浸出率的影响，得到了优化条件为：草酸浓度4 mol/L，反应温度80℃，反应时间2 h. 研究了浸出反应的动力学，计算得到表观活化能为43.85 kJ/mol，浸出过程属于未反应核收缩模型，速率为界面化学反应控制.

关键词: 草酸氧钛钠, 草酸, 合成, 浸出, 动力学

Abstract: Leachate solution containing titanium and sodium was acquired by leaching of cheaper sodium titanate Na8Ti5O14 with oxalic acid. The product of sodium titanyl oxalate with high purity of 99% was obtained successfully by evaporation crystallization, and characterized by XRD, IR, SEM, etc. The effects of the concentration of oxalic acid, reaction temperature, reaction time and stirring intensity on leaching rate of titanium were investigated, and the optimum process conditions obtained: concentration of oxalic acid 4 mol/L, reaction temperature 80℃, and reaction time 2 h. The temperature leaching kinetics was studied. The experimental results showed that the apparent activation energy was determined as 43.85 kJ/mol, the leaching of titanium followed the shrinking core model with surface reaction control.

Key words: sodium titanyl oxalate trihydrate, oxalic acid, synthesis, leaching, kinetics

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