Process for making manganese
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United States of America Patent
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Aug 3, 1999
Grant Date -
N/A
app pub date -
Sep 18, 1997
filing date -
Sep 18, 1997
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Expired
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Abstract
Using the electrolytic process to make manganese metal, a source of manganomanganic oxide (Mn.sub.3 O.sub.4) is used in the sulfuric acid leach solution in conjunction with a reducing agent to convert the manganomanganic oxide into manganese sulfate for treatment in the electrolytic cell. Sources of manganomanganic oxide include sintered manganese ore, manganese ore having less than 7% available oxygen such as Assoman Ore, and MOR fume. Reducing agents include sulfur dioxide, activated carbon, reducing sugars and molasses.
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