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Rare earth amide compositions

Patent ·
OSTI ID:1860116
; ; ;
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:
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
11,186,893
Application Number:
16/881,532
OSTI ID:
1860116
Country of Publication:
United States
Language:
English

References (6)

Solvent Extraction of Sr 2+ and Cs + using Protic Amide-Based Ionic Liquids journal July 2010
Lanthanides and Actinides in Ionic Liquids journal June 2007
Solvent extraction of lanthanides and yttrium from aqueous solution with methylimidazole in an ionic liquid journal January 2014
Dissolution of the Rare‐Earth Mineral Bastnaesite by Acidic Amide Ionic Liquid for Recovery of Critical Materials journal August 2015
Extraction of rare earth and heavy metals, using ionic solvents as extraction medium (A Review) journal December 2013
Liquid–liquid extraction of neodymium(iii) by dialkylphosphate ionic liquids from acidic medium: the importance of the ionic liquid cation journal January 2013

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