Leaching of manganese dioxide from porous bodies

Leaching of manganese dioxide from porous bodies Results of a study of the kinetics of manganese dioxide leaching from pores in anodes of solid-electrolyte capacitors are presented. It is shown that manganese dioxide present in pores is the most effectively dissolved at room temperature under treatment with dilute solutions of sulfuric and hydrochloric acids to which hydrogen peroxide is added in not-less-than-stoichiometric amounts according to the reactions MnO2 + H2SO4 + H2O2 = MnSO4 + 2H2O + O2→ and MnO2 + 2HCl + H2O2 = MnCl2 + 2H2O + O2→. The initial acid concentration does not exceed 36% for H2SO4 and 18% for HCl. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Leaching of manganese dioxide from porous bodies

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2012 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427212110122
Publisher site
See Article on Publisher Site

Abstract

Results of a study of the kinetics of manganese dioxide leaching from pores in anodes of solid-electrolyte capacitors are presented. It is shown that manganese dioxide present in pores is the most effectively dissolved at room temperature under treatment with dilute solutions of sulfuric and hydrochloric acids to which hydrogen peroxide is added in not-less-than-stoichiometric amounts according to the reactions MnO2 + H2SO4 + H2O2 = MnSO4 + 2H2O + O2→ and MnO2 + 2HCl + H2O2 = MnCl2 + 2H2O + O2→. The initial acid concentration does not exceed 36% for H2SO4 and 18% for HCl.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Dec 16, 2012

References

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