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Mercury removal from gaseous process streams

  • US 6,475,451 B1
  • Filed: 08/23/2000
  • Issued: 11/05/2002
  • Est. Priority Date: 08/23/2000
  • Status: Expired due to Term
First Claim
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1. A process for removing mercury from a gaseous process stream, said process comprising:

  • contacting a first mercury-containing gaseous process stream with a regenerable mercury scavenger solution to form a treated stream having a reduced mercury content and a used scavenger solution having an increased mercury content, the regenerable mercury scavenger solution comprising;

    a) nitric acid effective to oxidize mercury contained within the first mercury-containing gaseous process stream to form mercury cations, b) a complexing agent suitable for forming a soluble mercury compound when contacting the mercury cations, and c) a solvent effective to dissolve the soluble mercury compound.

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