Removal of manganous dithionate (MnS₂O₆) with MnO₂ from the desulfurization manganese slurry.

ABSTRACT: Manganese desulfurization has been increasingly explored, but the generated manganous dithionate (MD) by-product affects the valuable use of the desulfurized slurry. In this study, α-MnO₂, β-MnO₂, γ-MnO₂, and δ-MnO₂ were prepared for MD removal in desulfurization manganese slurry. Results showed that δ-MnO₂ had the best activity among the four because of its porosity and favorable surface properties. The operation conditions showed that 12.00 g L^-1 MD can be removed by more than 80.00% under the conditions of 1.4 mol L^-1 sulfuric acid, 100 g L^-1 δ-MnO₂ dosage, and reaction at 90 °C for 3 h. The MD removal with MnO₂ followed the decomposition-oxidation pass and direct oxidation-redu

SUBMITTER: Yang L 

PROVIDER: S-EPMC9048035 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature