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Extraction of metals using supercritical fluid and chelate forming legand

  • US 5,730,874 A
  • Filed: 06/02/1994
  • Issued: 03/24/1998
  • Est. Priority Date: 06/12/1991
  • Status: Expired due to Fees
First Claim
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1. A method for extracting a metalloid or metal species from a solid or liquid, comprising exposing the solid or liquid to a supercritical carbon dioxide fluid solvent and a halogenated β

  • -diketone chelating agent for a sufficient period of time to form chelates between the agent and species that are solubilized in the supercritical fluid solvent.

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