Method and apparatus for back-extracting metal chelates
Abstract
A method is described for 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. 3 figs.
- Inventors:
- Issue Date:
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 672667
- Patent Number(s):
- 5792357
- Application Number:
- PAN: 8-692,894; CNN: Grant CC-S-588193-002-C
- Assignee:
- Idaho Research Foundation, Inc., Moscow, ID (United States)
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 11 Aug 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; METALS; SUPERCRITICAL GAS EXTRACTION; CHELATING AGENTS; REGENERATION; MATERIALS RECOVERY
Citation Formats
Wai, C M, Smart, N G, and Lin, Y. Method and apparatus for back-extracting metal chelates. United States: N. p., 1998.
Web.
Wai, C M, Smart, N G, & Lin, Y. Method and apparatus for back-extracting metal chelates. United States.
Wai, C M, Smart, N G, and Lin, Y. Tue .
"Method and apparatus for back-extracting metal chelates". United States.
@article{osti_672667,
title = {Method and apparatus for back-extracting metal chelates},
author = {Wai, C M and Smart, N G and Lin, Y},
abstractNote = {A method is described for 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. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 11 00:00:00 EDT 1998},
month = {Tue Aug 11 00:00:00 EDT 1998}
}
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