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Title: 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):
5,792,357
Application Number:
PAN: 8-692,894; CNN: Grant CC-S-588193-002-C
Assignee:
Idaho Research Foundation, Inc., Moscow, ID (United States) PTO; SCA: 320305; PA: EDB-98:119227; SN: 98002026897
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 = {1998},
month = {8}
}