Patent ID: 8747802

Claim:
A method for preparing manganese sulfate monohydrate, comprising the following steps: 1) reacting MnO with (NH 4 ) 2 SO 4 solution under heat, and then carrying out solid-liquid separation for obtained product; 2) determining concentration of MnSO 4 in the resulting solution of step 1), adding ammonium sulfide solution to carry out equimolar reaction under agitation, carrying out solid-liquid separation for obtained product, and then washing solid phase; and 3) dissolving the solid phase obtained in step 2) with concentrated sulfuric acid, adding hydrogen peroxide to the resulting solution, heating to boiling, adjusting the pH value of the solution to 5-6, removing solid phase through precise filtration, evaporating and drying the filtrate to obtain MnSO 4 .H 2 O product.