Title of article
Preparation of chemical manganese dioxide from Moroccan pyrolusite mine waste
Author/Authors
Darmane، نويسنده , , Y. and Cherkaoui، نويسنده , , M. and Kitane، نويسنده , , S. and Alaoui، نويسنده , , A. and Sebban، نويسنده , , A. Ouazzani Touhami and A. Douira، نويسنده , , M. Ebn Touhami، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
6
From page
73
To page
78
Abstract
The preparation of manganese(IV) oxide from a Moroccan pyrolusite mine waste was studied. A sample of mine waste containing about 35% Mn was leached with 6.36 M HCl at 70 °C for 1 h with 98% leaching efficiency. The resulting solution was conditioned at pH 5 and sodium hypochlorite was added to obtain various oxide phases (Mn2O3, MnO2). Finally the oxides were transmuted by addition of nitric acid to obtain the α-MnO2, nH2O phase with 97% purity.
Keywords
Pyrolusite , HCl leach , Hypochlorite , transmutation , MnO2
Journal title
HYDROMETALLURGY
Serial Year
2008
Journal title
HYDROMETALLURGY
Record number
2371527
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