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Title: Metal chelate process to remove pollutants from fluids

The present invention relates to improved methods using an organic iron chelate to remove pollutants from fluids, such as flue gas. Specifically, the present invention relates to a process to remove NO.sub.x and optionally SO.sub.2 from a fluid using a metal ion (Fe.sup.2+) chelate wherein the ligand is a dimercapto compound wherein the --SH groups are attached to adjacent carbon atoms (HS--C--C--SH) or (SH--C--CCSH) and contain a polar functional group so that the ligand of DMC chelate is water soluble. Alternatively, the DMC' is covalently attached to a water insoluble substrate such as a polymer or resin, e.g., polystyrene. The chelate is regenerated using electroreduction or a chemical additive. The dimercapto compound bonded to a water insoluble substrate is also useful to lower the concentration or remove hazardous metal ions from an aqueous solution.
Inventors:
 [1]
  1. (El Cerrito, CA)
Issue Date:
OSTI Identifier:
869634
Assignee:
Regents of University of California (Oakland, CA) LBNL
Patent Number(s):
US 5370849
Contract Number:
AC03-76SF00098
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Country of Publication:
United States
Language:
English
Subject:
metal; chelate; process; remove; pollutants; fluids; relates; improved; methods; organic; iron; flue; gas; specifically; optionally; fluid; ligand; dimercapto; compound; -sh; attached; adjacent; carbon; atoms; hs-c-c-sh; sh-c-ccsh; contain; polar; functional; dmc; water; soluble; alternatively; covalently; insoluble; substrate; polymer; resin; polystyrene; regenerated; electroreduction; chemical; additive; bonded; useful; concentration; hazardous; aqueous; solution; adjacent carbon; water soluble; improved method; aqueous solution; carbon atoms; flue gas; carbon atom; water insoluble; metal chelate; remove pollutants; covalently attached; improved methods; hazardous metal; organic iron; iron chelate; /423/