Pretreatment and regeneration of oxides of manganese
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United States of America Patent
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May 9, 2006
Grant Date -
Nov 27, 2003
app pub date -
Dec 23, 2002
filing date -
Dec 21, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to systems and processes for treating particulate oxides of manganese useful as oxidizing sorbents for capturing or removing target pollutants from industrial gas streams, including, but not limited to, nitrogen oxides (NO.sub.x), sulfur oxide (SO.sub.x), mercury (Hg), hydrogen sulfide (H.sub.2S), other totally reduced sulfides (TRS), and oxides of carbon (CO and CO.sub.2) gases. Oxides of manganese are washed an aqueous oxidizing solution, which may be adjusted as necessary to maintain the oxidizing solution a desired range of pH (acidity) and Eh (oxidizing potential) within the MnO.sub.2 stability area for aqueous solutions. The resulting treated oxides of manganese are equally or more efficient as sorbents as the oxides of manganese processed with the invention.
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