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›› 2014, Vol. 14 ›› Issue (6): 1035-1040.

• 材料工程专栏 • 上一篇    下一篇

硝酸锰溶液直接氧化法制备电子级四氧化三锰

袁明亮 李康   

  1. 中南大学资源加工与生物工程学院 中南大学资源加工与生物工程学院
  • 收稿日期:2014-10-20 修回日期:2014-11-05 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: 袁明亮

Preparation of Electronic Grade Mangano-Manganic Oxide by Direct Oxidation of Manganese Nitrate Solution

YUAN Ming-liang LI Kang   

  1. School of Resources Processing and Bioengineering, Central South University School of Resources Processing and Bioengineering, Central South University
  • Received:2014-10-20 Revised:2014-11-05 Online:2014-12-20 Published:2014-12-20
  • Contact: YUAN Ming-liang

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摘要： 以硝酸锰为原料、氨水为沉淀剂、空气为氧化剂制备高纯Mn3O4. 通过正交实验研究了氨水滴加速度、反应终点pH值、反应温度、乙醇加入量、空气通入速率对产物中Mn含量的影响. 结果表明，当氨水滴加速度为4 mL/min、反应终点pH值为11、反应温度为80℃、乙醇加入量为15 mL、空气通入流量为80 L/h时，获得产物Mn含量为77.53%(w)、粒度约为10 mm的高纯电子级Mn3O4，同时克服了现有技术采用硫酸锰制备Mn3O4中硫含量高的缺点.

关键词: 四氧化三锰, 硝酸锰, 直接氧化法, 电子级

Abstract: High-purity electronic grade Mn3O4 was prepared by a direct oxidation route of manganese nitrate solution as raw material, aqueous ammonia as precipitant and air as oxidant. The effects of preparation conditions, such as feeding rate of aqueous ammonia, pH value, reaction temperature, ethanol addition and air flow rate, on Mn content in the obtained product were examined by orthogonal experiments. The results show that the obtained product is high-purity electronic grade Mn3O4, Mn content reaches the maximum value of 77.53%, and Mn particle size is 10 mm under the conditions of feeding rate 4 mL/min, pH value 11, reaction temperature 80℃, ethanol addition 15 mL and air flow rate 80 L/h. In addition, the product overcomes the disadvantage of high sulfur content in the mangano-manganic oxide which is prepared by manganese sulfate.

Key words: mangano-manganic oxide, manganese nitrate, direct oxidation, electronic grade

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