Method and apparatus for back-extracting metal chelates

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

Method and apparatus for back-extracting metal chelates

Patent · Wed Dec 31 23:00:00 EST 1997

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

Patent Number(s):: US 5792357

OSTI ID:: 871769

Country of Publication:: United States

Language:: English

References (23)

In situ Derivatization and Supercritical Fluid Extraction for the Simultaneous Determination of Butyltin and Phenyltin Compounds in Sediment Cai, Yong.; Alzaga, R.; Bayona, Josep M. Analytical Chemistry, Vol. 66, Issue 7 https://doi.org/10.1021/ac00079a034	journal	April 1994
Supercritical fluids offer improved separations: Gases at high pressure and above critical temperature separate compounds under mild conditions, require less energy but more capital Worthy, Ward Chemical & Engineering News, Vol. 59, Issue 31 https://doi.org/10.1021/cen-v059n031.p016	journal	August 1981
Recovery of Metals from Aqueous Media by Extraction with Supercritical Carbon Dioxide Wang, Jin.; Marshall, William D. Analytical Chemistry, Vol. 66, Issue 10 https://doi.org/10.1021/ac00082a010	journal	May 1994
Selective extraction of mercury with ionizable crown ethers in supercritical carbon dioxide Wang, Shaofen.; Elshani, Sadik.; Wai, C. M. Analytical Chemistry, Vol. 67, Issue 5 https://doi.org/10.1021/ac00101a019	journal	March 1995
Enhanced extraction of lanthanides with crown ether carboxylic acids of increasing lipophilicity Tang, Jian; Wai, Chien M. The Analyst, Vol. 114, Issue 4 https://doi.org/10.1039/an9891400451	journal	January 1989
Supercritical Fluid Extraction of Thorium and Uranium Ions from Solid and Liquid Materials with Fluorinated .beta.-Diketones and Tributyl Phosphate Lin, Yuehe.; Wai, Chien M.; Jean, Fred M. Environmental Science & Technology, Vol. 28, Issue 6 https://doi.org/10.1021/es00055a034	journal	June 1994
Comparison of methods to prevent restrictor plugging during off-line supercritical extraction Burford, Mark D.; Hawthorne, Steven B.; Miller, David J. Journal of Chromatography A, Vol. 609, Issue 1-2 https://doi.org/10.1016/0021-9673(92)80176-U	journal	September 1992
Effects of collection solvent parameters and extraction cell geometry on supercritical fluid extraction efficiencies Langenfeld, John J.; Burford, Mark D.; Hawthorne, Steven B. Journal of Chromatography A, Vol. 594, Issue 1-2 https://doi.org/10.1016/0021-9673(92)80343-S	journal	March 1992
Solvent extraction of lanthanides with a crown ether carboxylic acid Tang, Jian.; Wai, C. M. Analytical Chemistry, Vol. 58, Issue 14 https://doi.org/10.1021/ac00127a068	journal	December 1986
Solvent extraction of dithiocarbamate complexes and back-extraction with mercury(II) for determination of trace metals in seawater by atomic absorption spectrometry Lo, J. M.; Yu, J. C.; Hutchison, F. I. Analytical Chemistry, Vol. 54, Issue 14 https://doi.org/10.1021/ac00251a029	journal	December 1982
Supercritical fluid extraction and chromatography of metal chelates and organometallic compounds Lin, Yuehe; Smart, Neil G.; Wai, C. M. TrAC Trends in Analytical Chemistry, Vol. 14, Issue 3 https://doi.org/10.1016/0165-9936(95)94045-G	journal	March 1995
Extraction of lanthanides from acidic solution using tributyl phosphate modified supercritical carbon dioxide Laintz, K. E.; Tachikawa, E. Analytical Chemistry, Vol. 66, Issue 13 https://doi.org/10.1021/ac00085a040	journal	July 1994
Determination of organotin compounds in environmental samples by supercritical fluid extraction and gas chromatography with atomic emission detection Liu, Yan; Lopez-Avila, Viorica; Alcaraz, Marcela Journal of High Resolution Chromatography, Vol. 16, Issue 2 https://doi.org/10.1002/jhrc.1240160208	journal	February 1993
Supercritical Fluid Extraction of Lanthanides with Fluorinated .beta.-Diketones and Tributyl Phosphate Lin, Yuehe.; Wai, C. M. Analytical Chemistry, Vol. 66, Issue 13 https://doi.org/10.1021/ac00085a008	journal	July 1994
Packed microcolumn SFC coupled with photodiode array UV detector and inductively coupled plasma detector (SFC-photodiode array UV-ICP) Jinno, K.; Mae, H.; Fujimoto, C. Journal of High Resolution Chromatography, Vol. 13, Issue 1 https://doi.org/10.1002/jhrc.1240130104	journal	January 1990
Supercritical fluid extraction of lanthanides and actinides from solid materials with a fluorinated .beta.-diketone Lin, Yuehe.; Brauer, R. D.; Laintz, K. E. Analytical Chemistry, Vol. 65, Issue 18 https://doi.org/10.1021/ac00066a027	journal	September 1993
The use of polar modifiers in microbore supercritical fluid chromatography combined with inductively coupled plasma spectrometry Fujimoto, Chuzo; Yoshida, Hiroyuki; Jinno, Kiyokatsu Journal of Microcolumn Separations, Vol. 1, Issue 1 https://doi.org/10.1002/mcs.1220010106	journal	January 1989
Zum Stand der Extraktion mit komprimierten Gasen Brunner, Gerd; Peter, Siegfried Chemie Ingenieur Technik, Vol. 53, Issue 7 https://doi.org/10.1002/cite.330530707	journal	January 1981
Construction of a robust stainless-steel clad fused-silica restrictor for use in supercritical fluid extraction Burford, Mark D.; Hawthorne, Steven B.; Miller, David J. Journal of Chromatography A, Vol. 648, Issue 2 https://doi.org/10.1016/0021-9673(93)80427-A	journal	October 1993
Determination of an organotin stabilizer in a rigid poly(vinyl chloride) plastic by on-line supercritical fluid extraction and chromatography with formic acid modified carbon dioxide and flame ionization detection Oudsema, John W.; Poole, Colin F. Journal of High Resolution Chromatography, Vol. 16, Issue 3 https://doi.org/10.1002/jhrc.1240160316	journal	March 1993
Supercritical fluid extraction of organic and inorganic mercury from solid materials Wai, C. M.; Lin, Yuehe; Brauer, Russell Talanta, Vol. 40, Issue 9 https://doi.org/10.1016/0039-9140(93)80205-6	journal	September 1993
Determination of Metals in Solid Samples by Complexation--Supercritical Fluid Extraction and Gas Chromatography--Atomic Emission Detection Liu, Y.; Lopez-Avila, V.; Alcaraz, M. Journal of Chromatographic Science, Vol. 31, Issue 8 https://doi.org/10.1093/chromsci/31.8.310	journal	August 1993
Extraction of metal ions from liquid and solid materials by supercritical carbon dioxide Laintz, K. E.; Wai, C. M.; Yonker, C. R. Analytical Chemistry, Vol. 64, Issue 22 https://doi.org/10.1021/ac00046a039	journal	November 1992

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Method and apparatus for back-extracting metal chelates

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