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Title: Method and apparatus for back-extracting metal chelates

Abstract

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.

Inventors:
 [1];  [1];  [1]
  1. Moscow, IA
Issue Date:
OSTI Identifier:
871769
Patent Number(s):
5792357
Assignee:
Idaho Research Foundation, Inc. (Moscow, ID)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
DOE Contract Number:  
CC-S-588193-002-C
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; back-extracting; metal; chelates; extracting; metalloid; species; solid; liquid; substrate; supercritical; fluid; solvent; containing; chelating; agents; followed; formed; back-extraction; acidic; solution; performed; utilizing; sufficient; exposure; released; acid; agent; remains; regenerated; recovered; species recovered; extracting metal; solvent containing; acid solution; supercritical fluid; chelating agents; chelating agent; fluid solvent; acidic solution; metal chelate; metal chelates; chelates form; chelates formed; agents followed; liquid substrate; /210/423/

Citation Formats

Wai, Chien M, Smart, Neil G, and Lin, Yuehe. Method and apparatus for back-extracting metal chelates. United States: N. p., 1998. Web.
Wai, Chien M, Smart, Neil G, & Lin, Yuehe. Method and apparatus for back-extracting metal chelates. United States.
Wai, Chien M, Smart, Neil G, and Lin, Yuehe. Thu . "Method and apparatus for back-extracting metal chelates". United States. https://www.osti.gov/servlets/purl/871769.
@article{osti_871769,
title = {Method and apparatus for back-extracting metal chelates},
author = {Wai, Chien M and Smart, Neil G and Lin, Yuehe},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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Works referenced in this record:

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