Darmane, Y. and Cherkaoui, M. and Kitane, S. and Alaoui, A. and Sebban, A. and Touhami, M.E. (2008) Preparation of chemical manganese dioxide from Moroccan pyrolusite mine waste. Hydrometallurgy, 92 (1-2). pp. 73-78.

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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. © 2008 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Hydrochloric acid; Leaching; Nitric acid; Oxides, Hypochlorite; Manganese dioxide; Oxide phases; Pyrolusite; Transmutation, Manganese
Subjects: Engineering
Divisions: SCIENTIFIC PRODUCTION > Engineering
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:47
URI: http://eprints.umi.ac.ma/id/eprint/3380

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