晶种控制沉淀法制备重质碳酸锰  

Preparation of dense manganese carbonate by chemical precipitation of crystal seed control

作　　者：赵俊海[1] 吴显明[1,2] 陈上[1,2] 何海亮[1] 麻明友[1] 丁其晨[1] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]湘西自治州矿产与新材料技术创新服务中心,湖南吉首416000

出　　处：《应用化工》2013年第11期2039-2041,共3页Applied Chemical Industry

摘　　要：采用添加晶种控制结晶沉淀的方法来制备碳酸锰,考察了温度、碳酸氢铵浓度、晶种用量以及反应物滴加时间等条件对产物碳酸锰振实密度的影响规律。结果表明,当反应温度为30℃,晶种加入量为20%,碳酸氢铵浓度为2 mol/L,反应物滴加时间为4.5 h时,制备出振实密度可达2.3 g/cm3、纯度高的重质碳酸锰,且实验的重复性好。Manganese carbonate was prepared by controlled crystallization method with seeding material. The effect of reaction temperature, ammonium bicarbonate concentration, crystal seeds and the dropping time of reactants on the tap density of manganese carbonate was investigated. The optimal preparation conditions are as follows：the reaction temperature is 30℃, seed crystal consumption is 20%, the concentration of ammonium bicarbonate is 2 mol/L,the dropping time of reactants is 4.5 h ,the tap density of man- ganese carbonate prepared under these conditions reaches 2.3 g/cm3. The manganese carbonate has a high purity and the preparation method has good reproducibility.

关 键 词：碳酸锰 温度 滴加时间 振实密度 晶种 

分 类 号：TQ137.12[化学工程—无机化工]