| 摘要 |
<p>Provided is a method for preparing manganese sulfate monohydrate, which comprises the following steps: (1) reacting MnO with (NH4)2SO4 solution under heat, and separating solid from liquid after reaction; (2) determining the concentration of MnSO4 in the resulting solution of step (1), adding equimolar (NH4)2S solution thereto to carry out reaction under agitation, separating solid from liquid after reaction and washing the solid; (3) dissolving the obtained solid with concentrated sulfuric acid, adding hydrogen peroxide to the resulting solution, heating to boiling, adjusting the pH of the solution to 5-6, removing the solid phase through precise filtration, evaporating the filtrate and drying to obtain the MnSO4·H2O product. The impurities are separated away and the amount of byproducts is reduced by this method, and the yield of manganese sulfate is improved.</p> |
