Metal regeneration of iron chelates in nitric oxide scrubbing
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United States of America Patent
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Aug 19, 1997
Grant Date -
N/A
app pub date -
Mar 29, 1995
filing date -
Mar 29, 1995
priority date (Note) -
Expired
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Abstract
The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.
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