Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Separation of rare earth elements using supported membrane solvent extraction

Patent ·
OSTI ID:1892791
; ;

A system and method for the recovery and separation of rare earth elements (REEs) are provided. The system and method include the supported membrane solvent extraction of REEs and the separation of light and heavy REEs that have been recovered from scrap permanent magnets and other electronic waste. In supported membrane solvent extraction, an organic phase consisting of an extractant and an organic solvent is immobilized in the pores of hollow fibers. An aqueous feed solution and a strip solution flow along the shell side and lumen side of the hollow fibers, respectively. The extractant functions as a carrier to selectively transport certain rare earth metal ions from the feed side to the strip side. The rare earth metals are concurrently back extracted in the strip solution, allowing processing to proceed continuously without equilibrium limitations.

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):
11,293,078
Application Number:
16/537,759
OSTI ID:
1892791
Country of Publication:
United States
Language:
English

References (5)

Comparison of Cyanex 272 and Cyanex 572 for the separation of Neodymium from a Nd/Tb/Dy mixture by pertraction journal November 2017
Separation and mass transport of Nd(III) from mixed rare earths via hollow fiber supported liquid membrane: Experiment and modeling journal July 2014
Factors influencing separation selectivity of rare earth elements in flat sheet supported liquid membranes journal December 2018
The separation of Nd(III) from mixed rare earth via hollow fiber supported liquid membrane and mass transfer analysis journal June 2015
Selective enrichment of palladium from spent automotive catalysts by using a liquid membrane system journal September 2003

Similar Records

Membrane assisted solvent extraction for rare earth element recovery
Patent · Tue May 15 00:00:00 EDT 2018 · OSTI ID:1438367
Selective Extraction of Rare Earth Elements from Permanent Magnet Scraps with Membrane Solvent Extraction
Journal Article · Wed Jun 24 00:00:00 EDT 2015 · Environmental Science and Technology · OSTI ID:1265582

Related Subjects