硫酸锰室温固相球磨制备四氧化三锰  

Preparation of Mn3O4from manganese sulfate by solid-state ball milling reaction at room temperature

作　　者：马玉文[1] 冯雅丽[1] 李浩然[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室

出　　处：《无机盐工业》2013年第2期17-19,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(21176026);国家863计划(2012AA062401)

摘　　要：利用软锰矿吸收硫酸镁热解尾气二氧化硫制得硫酸锰,再与碳酸氢铵室温下固相球磨反应,制备出前躯体碳酸锰,经热分解获得四氧化三锰。分别考察了物料比、球磨时间、球料比等因素对硫酸锰转化率的影响,采用XRD对产物进行了分析。结果表明,在n(碳酸氢铵)∶n(硫酸锰)=3.5∶1、球磨时间为40 min、球料质量比为5∶1时,硫酸锰的转化率可达99.8%,将固相产物在1 000℃热解1 h后所制备的四氧化三锰纯度为99.9%。该工艺操作简单,产品纯度高,成本低,为硫酸锰制备四氧化三锰提供了新的途径。Manganese sulfate was prepared by reaction between pyrolusite and sulfur oxide from the pyrolysis of magnesium sulfate.Mn304 can be prepared by pyrolysing the precursor MnCO3.Tbe precursor was synthesized by solid-state ball milling reaction between NH4HCO3and MnSO4·H20 at room temperature.Effects of materials mix ratio, milling time, and ball-feed mass ratio on the conversion of manganese sulfate were investigated respectively.The products were analyzed by XRD.Results showed that the conversion rate of MnSO4. H20 could reach 99.8% under the conditions of mix ratio 3.5：1 （amount-of-substance ratio of NH4HC03 to MnS04· H20 ）, milling time 40 min,and ball-feed mass ratio 5：l.The Mn304,whose purity was 99.9%, can be prepared by pyrolysing manganese carbonate at 1000℃ for 1 h.The process has the advantages of simple in operation,high oroduct purity, and low cost. and it can provide a new route for the Dreoaration MmO, from MnSO4· H2O.

关 键 词：硫酸锰 碳酸锰 四氧化三锰 固相球磨反应 

分 类 号：TQ137.12[化学工程—无机化工]