Patent ID: 8480997
Filing Date: 2013-07-09
Classification: C01G,C01P

Abstract:
1. A method for preparing manganese sulfate monohydrate, comprising the following steps: 1) preparing manganese sulfate solution; 2) adding equimolar BaS or SrS solution into the prepared manganese sulfate solution to carry out reaction fully, and then carrying out solid-liquid separation for obtained product, and washing obtained solid phase; 3) adding deionized water into the solid phase obtained from the step of solid-liquid separation in step 2) to prepare a slurry, dissolving the slurry with concentrated sulfuric acid, and carrying out solid-liquid separation for the obtained product of MnSO4 solution; and 4) adding proper amount of hydrogen peroxide to the MnSO4 solution obtained from the step of solid-liquid separation in step 3), heating the mixture until boiling, adjusting the pH value of the mixture within 5-6, and carrying out precise filtration for the obtained product, evaporating and crystallizing the filtrate and drying obtained crystalline to obtain manganese sulfate monohydrate product.