由硫酸锰制备高纯四氧化三锰的研究  

High-purity Mn_3O_4 Derived from Manganese Sulfate

作　　者：朱伟长[1] 吴小俊[1] 高孝钱[1] 刘欣[1] 汪敏[1] 吴鹏[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2013年第2期138-141,共4页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省高校自然科学研究重点项目(KJ2012A045)

摘　　要：以MnSO4为原料、氨水为沉淀剂、空气为氧化剂,制备高纯Mn3O4。研究溶液pH值、反应温度以及催化剂对产物中Mn离子沉淀率和Mn含量的影响。结果表明:沉淀终点pH值为9.5时,Mn离子的沉淀率最大,达75.3%;当使用催化剂NH4Cl、控制氧化温度为40℃时,获得产物的Mn质量分数为71.5%、粒径小于200 nm,为高纯Mn3O4。High-purity Mn3O4 was prepared by a precipitation-oxidation route, using low-cost manganese sulfate as raw material, aqueous ammonia as precipitant, and air as oxidant. Effect of the preparation conditions, such as pH value, reaction temperature and catalyst applied, etc., on precipitating rate of the Mn2＋ ions and Mn content in the obtained product was investigated. The results show that precipitating rate of the Mu2＋ ions reaches the maximum value of 75.3%, when pH=9.5. With the aid of a catalyst of NH4Cl and the oxidation temperature controlled at 40℃, the precipitation product obtained is characterized to be a high-purity Mn3O4 with a particle size of less than 200 m, and Mn content in the obtained product is determined to be as high as 71.5%.

关 键 词：四氧化三锰 硫酸锰 氧化法 高纯度 

分 类 号：TF111.31[冶金工程—冶金物理化学]