硝酸锰溶液直接氧化法制备电子级四氧化三锰

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

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p H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 m L/min、反应终点p H值为11、反应温度为80℃、乙醇加入量为15 m L、空气通入流量为80 L/h时,获得产物Mn含量为77.53%(ω)、粒度约为10μm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.

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,p H 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 μm under the conditions of feeding rate 4 mL/min,p H 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.