Method and apparatus for back-extracting metal chelates

Wai, Chien M; Smart, Neil G; Lin, Yuehe

Title: Method and apparatus for back-extracting metal chelates

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871769

Wai, Chien M ^[1]; Smart, Neil G ^[1]; Lin, Yuehe ^[1]

Moscow, IA

A method of extracting metal and metalloid species from a solid or liquid substrate using a supercritical fluid solvent containing one or more chelating agents followed by back-extracting the metal and metalloid species from the metal and metalloid chelates formed thereby. The back-extraction acidic solution is performed utilizing an acidic solution. Upon sufficient exposure of the metal and metalloid chelates to the acidic solution, the metal and metalloid species are released from the chelates into the acid solution, while the chelating agent remains in the supercritical fluid solvent. The chelating agent is thereby regenerated and the metal and metalloid species recovered.

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DOE Contract Number:: CC-S-588193-002-C

Assignee:: Idaho Research Foundation, Inc. (Moscow, ID)

Patent Number(s):: US 5792357

OSTI ID:: 871769

Country of Publication:: United States

Language:: English

References (23)

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solid
liquid
substrate
supercritical
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acidic
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utilizing
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acid
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remains
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extracting metal
solvent containing
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supercritical fluid
chelating agents
chelating agent
fluid solvent
acidic solution
metal chelate
metal chelates
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Title: Method and apparatus for back-extracting metal chelates

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References (23)

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