Method for separating metal chelates from other materials based on solubilities in supercritical fluids

Wai, Chien M; Smart, Neil G; Phelps, Cindy

Title: Method for separating metal chelates from other materials based on solubilities in supercritical fluids

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873552

Wai, Chien M ^[1]; Smart, Neil G ^[2]; Phelps, Cindy ^[1]

Moscow, ID
Workington, GB

A method for separating a desired metal or metalloi from impurities using a supercritical extraction process based on solubility differences between the components, as well as the ability to vary the solvent power of the supercritical fluid, is described. The use of adduct-forming agents, such as phosphorous-containing ligands, to separate metal or metalloid chelates in such processes is further disclosed. In preferred embodiments, the extraction solvent is supercritical carbon dioxide and the chelating agent is selected from the group consisting of .beta.-diketones; phosphine oxides, such as trialkylphosphine oxides, triarylphosphine oxides and alkylarylphosphine oxides; phosphinic acids; carboxylic acids; phosphates, such as trialkylphosphates, triarylphosphates and alkylarylphosphates; crown ethers; dithiocarbamates; phosphine sulfides; phosphorothioic acids; thiophosphinic acids; halogenated analogs of these chelating agents; and mixtures of these chelating agents. In especially preferred embodiments, at least one of the chelating agents is fluorinated.

View Patent

Cite

Export

Save

Research Organization:: Univ. of Iowa, Iowa City, IA (United States)

DOE Contract Number:: FG02-91ER75679

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

Patent Number(s):: US 6187911

OSTI ID:: 873552

Country of Publication:: United States

Language:: English

References (21)

Extraction of Toxic Heavy Metals Using Supercritical Fluid Carbon Dioxide Containing Organophosphorus Reagents Smart, Neil G.; Carleson, Thomas E.; Elshani, Sadik Industrial & Engineering Chemistry Research, Vol. 36, Issue 5 https://doi.org/10.1021/ie960384v	journal	May 1997
High solubility of UO2(NO3)2·2TBP complex in supercritical CO2 Carrott, Mike J.; Waller, Brenda E.; Wai, Chien M. Chemical Communications, Issue 3 https://doi.org/10.1039/a708113h	journal	January 1998
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
Tri-n-octylphosphine sulfide: Elliott, Donald E.; Banks, Charlesa V. Analytica Chimica Acta, Vol. 33 https://doi.org/10.1016/S0003-2670(01)84886-8	journal	January 1965
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
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
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
Cobalt-nickel separation: the extraction of cobalt(II) and nickel(II) by Cyanex 301, Cyanex 302 and Cyanex 272 Tait, Brian K. Hydrometallurgy, Vol. 32, Issue 3 https://doi.org/10.1016/0304-386X(93)90047-H	journal	April 1993
The Separation of Americium from Light Lanthanides by Cyanex 301 Extraction Zhu, Yongjun Radiochimica Acta, Vol. 68, Issue 2 https://doi.org/10.1524/ract.1995.68.2.95	journal	January 1995
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
The Extraction of Americium and Light Lanthanides by HDEHDTP and Cyanex 302 Zhu, Yongjun; Jiao, Rongzhou Radiochimica Acta, Vol. 69, Issue 3 https://doi.org/10.1524/ract.1995.69.3.191	journal	January 1995
Metal-chelate gas-chromatography for trace element analysis Neeb, R. Pure and Applied Chemistry, Vol. 54, Issue 4 https://doi.org/10.1351/pac198254040847	journal	January 1982
Solvent extraction of copper by Cyanex 272, Cyanex 302 and Cyanex 301 Sole, Kathryn C.; Hiskey, J. Brent Hydrometallurgy, Vol. 37, Issue 2 https://doi.org/10.1016/0304-386X(94)00023-V	journal	February 1995
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
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
Observations on the solubility of surfactants and related molecules in carbon dioxide at 50°C Consan, Keith A.; Smith, Richard D. The Journal of Supercritical Fluids, Vol. 3, Issue 2 https://doi.org/10.1016/0896-8446(90)90008-A	journal	June 1990
The Extraction of some base Metal ions by Cyanex 30l Cyanex 302 and Their Binary Extractant Mixtures with Aliquat 336 Tait, Brian K. Solvent Extraction and Ion Exchange, Vol. 10, Issue 5 https://doi.org/10.1080/07366299208918136	journal	December 1992
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
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
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

Similar Records

Extraction of metals using supercritical fluid and chelate forming ligand

Patent · Tue Mar 24 00:00:00 EST 1998 · OSTI ID:873552

Wai, C M; Laintz, K E

Extraction of metals using supercritical fluid and chelate forming legand

Patent · Tue Mar 24 00:00:00 EST 1998 · OSTI ID:873552

Wai, Chien M; Laintz, Kenneth E

Fluid extraction using carbon dioxide and organophosphorus chelating agents

Patent · Tue Nov 24 00:00:00 EST 1998 · OSTI ID:873552

Smart, N G; Wai, C M; Lin, Y; +1 more

Related Subjects

method
separating
metal
chelates
materials
based
solubilities
supercritical
fluids
desired
metalloi
impurities
extraction
process
solubility
differences
components
ability
vary
solvent
power
fluid
described
adduct-forming
agents
phosphorous-containing
ligands
separate
metalloid
processes
disclosed
preferred
embodiments
carbon
dioxide
chelating
agent
selected
consisting
beta
-diketones
phosphine
oxides
trialkylphosphine
triarylphosphine
alkylarylphosphine
phosphinic
acids
carboxylic
phosphates
trialkylphosphates
triarylphosphates
alkylarylphosphates
crown
ethers
dithiocarbamates
sulfides
phosphorothioic
thiophosphinic
halogenated
analogs
mixtures
especially
fluorinated
desired metal
phosphine oxide
crown ethers
especially preferred
trialkylphosphine oxide
extraction process
supercritical carbon
extraction solvent
supercritical extraction
preferred embodiments
supercritical fluid
carbon dioxide
preferred embodiment
chelating agents
chelating agent
carboxylic acids
carboxylic acid
metal chelate
separating metal
phosphine oxides
supercritical fluids
metal chelates
forming agent
separate metal
phosphinic acid
process based
materials based
/999/210/423/

Title: Method for separating metal chelates from other materials based on solubilities in supercritical fluids

Citation Formats

References (21)

Similar Records

Related Subjects