氯化锰溶液生产高品质四氧化三锰粉体的研究

采用N235萃取提纯的氯化锰溶液制备高品质四氧化三锰。结果表明,最佳条件为:反应温度60℃、搅拌速度500r/min、氯化铵用量2g/L、溶液锰浓度20g/L、pH 7.5、溶液流速3L/h、氧化时间6h。制备出的四氧化三锰粒度集中,比表面较大,钙、镁等达到国内电子级产品先进水平,杂质铁、硒、铬含量远低于国内同类产品。

Study on Preparation of Manganous-Manganic Oxide from Purified Manganese Chloride Solution

High quality manganous-manganic oxide(Mn3O4) was prepared from manganese chloride solution purified with N235 extraction.The results show that the optimum conditions include reaction temperature of 60 ℃,stirring speed of 500 r/min,dosage of ammonium chloride of 2 g/L,manganese concentration of 20 g/L,pH=7.5,solution flow rate of 3 L/h,and oxidation time of 6 h.The prepared Mn3O4 reaches the advanced level of domestic electronic grade with concentrated grain size,larger specific surface area and lower content of calcium and magnesium.The impurity contents(iron,selenium,chromium) are far below those of the counterpart in domestic market.