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Title: Methods for liquid extraction of rare earth metals using ionic liquids

Abstract

A method for extracting a rare earth element from a rare earth-containing substance, the method comprising mixing the rare earth-containing substance with a protic ionic liquid, such as: wherein R1 is selected from hydrogen atom and hydrocarbon groups containing 1 to 6 carbon atoms; R2 and R3 are independently selected from hydrocarbon groups containing 1 to 12 carbon atoms; and X− is an anionic species; to produce a composition of the formula (RE)(amide)yXz at least partially dissolved in the protic ionic liquid, wherein RE is at least one rare earth element having an atomic number selected from 39, 57-71, and 90-103; y is 2-6; z is a number that charge balances the total positive charge of RE; and the amide is the conjugate base of the cationic portion of the protic ionic liquid of Formula (1) and has the following formula:

Inventors:
; ; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1651049
Patent Number(s):
10689727
Application Number:
15/135,753
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 04/22/2016
Country of Publication:
United States
Language:
English

Citation Formats

Freiderich, John William, Luo, Huimin, Moyer, Bruce A., and Dai, Sheng. Methods for liquid extraction of rare earth metals using ionic liquids. United States: N. p., 2020. Web.
Freiderich, John William, Luo, Huimin, Moyer, Bruce A., & Dai, Sheng. Methods for liquid extraction of rare earth metals using ionic liquids. United States.
Freiderich, John William, Luo, Huimin, Moyer, Bruce A., and Dai, Sheng. Tue . "Methods for liquid extraction of rare earth metals using ionic liquids". United States. https://www.osti.gov/servlets/purl/1651049.
@article{osti_1651049,
title = {Methods for liquid extraction of rare earth metals using ionic liquids},
author = {Freiderich, John William and Luo, Huimin and Moyer, Bruce A. and Dai, Sheng},
abstractNote = {A method for extracting a rare earth element from a rare earth-containing substance, the method comprising mixing the rare earth-containing substance with a protic ionic liquid, such as: wherein R1 is selected from hydrogen atom and hydrocarbon groups containing 1 to 6 carbon atoms; R2 and R3 are independently selected from hydrocarbon groups containing 1 to 12 carbon atoms; and X− is an anionic species; to produce a composition of the formula (RE)(amide)yXz at least partially dissolved in the protic ionic liquid, wherein RE is at least one rare earth element having an atomic number selected from 39, 57-71, and 90-103; y is 2-6; z is a number that charge balances the total positive charge of RE; and the amide is the conjugate base of the cationic portion of the protic ionic liquid of Formula (1) and has the following formula:},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {6}
}

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Works referenced in this record:

Supported liquid membrane separation
patent, July 2000


Recovery of metal values from spent catalysts
patent, January 1988


Method and apparatus for separating ions of metallic elements in aqueous solution
patent, November 2006


Aqueous electrodeposition of rare earth and transition metals
patent, October 2001