Back to results
US 4,818,354 AGranted
Process for the preparation electrolytic manganese dioxide
AssigneeHoechst Aktiengesellschaft
InventorsEberhard Preisler, Johannes Holzem, Gerhard Mietens, Gerhard Nolte
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for the preparation of electrolytic manganese dioxide in which flocculent nuclei of a manganese oxide hydrate is dispersed in the electrolyte.
Claims8
In the process for the preparation of electrolytic manganese dioxide (EMD) by electrolyzing an electrolyte consisting of a sulfuric acid solution of manganese sulfate by means of titanium anodes
- the steps comprising the manganese sulfate and sulfuric acid concentrations in the said solution are kept constant by continuously removing a part by volume of the used electrolyte
- replacing the removed electrolyte by supplying an equivalent volume of fresh manganese sulfate solution,
- producing flocculent nuclei of a manganese oxide hydrate in said manganese sulfate solution and
- supplying these nuclei together with the manganese sulfate solution to the electrolyte in the cell.
1 more element
Dependencies are inferred from the claim text.