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    • 137. 发明公开
    • METHOD FOR PREPARING MANGANESE SULFATE
    • VERFAHREN ZUR HERSTELLUNG VON MANGANSULFAT
    • EP2455341A1
    • 2012-05-23
    • EP10799405.5
    • 2010-06-13
    • Guizhou Redstar Developing Co., Ltd.Shenzhen Haoyitong Investment And Development Co., Ltd.
    • JIANG, ZhiguangHUA, Dong
    • C01G45/10
    • C01G45/10C01G45/02C01P2006/80
    • Provided is a method for preparing manganese sulfate, which comprises the following steps: adding sulfide with reducing ability to manganese dioxide ore by quantification according to the reaction molar ratio to fully react, determining the end-point of reaction, and then separating and washing solid product; reacting the solid product with 9-12mol/L H 2 SO 4 , controlling the end-point of reaction to pH 3-5, keeping the MnSO 4 concentration in the reaction liquid within the range of 300 - 400g/L, and then separating solid from liquid after reaction; and using H 2 SO 4 to acidify the separated solution until the pH value of the solution is 2-3, adding hydrogen peroxide and heating, finely filtering to remove solid phase, and then vaporizing, condensing, crystallizing and dewatering the filtered liquid to obtain manganese sulfate. The method enables a plurality of heavy metals to be converted into indissoluble sulfides while obtaining manganous compounds that are dissoluble in acid. At the same time, manganese sulfate low in calcium, magnesium and heavy metals is obtained.
    • 本发明提供硫酸锰的制备方法,其特征在于,通过根据反应摩尔比定量添加二氧化锰矿还原能的硫化物进行充分反应,确定反应终点,然后分离洗涤固体 产品; 使固体产物与9-12mol / LH 2 SO 4反应,控制反应终点为pH 3-5,使反应液中的MnSO 4浓度保持在300-400g / L范围内,然后分离固体 反应后液体; 并使用H 2 SO 4将分离的溶液酸化直至溶液的pH值为2-3,加入过氧化氢并加热,精细过滤除去固相,然后蒸发,冷凝,结晶和脱水过滤液体,得到 硫酸锰。 该方法能够将多种重金属转化为不溶性硫化物,同时获得可溶于酸的二价锰化合物。 同时,获得了低钙,镁和重金属的硫酸锰。