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Membrane assisted solvent extraction for rare earth element recovery

Patent ·
OSTI ID:1438367
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Systems and methods for the recovery of rare earth elements are provided. The systems and methods generally include membrane assisted solvent extraction using permeable hollow fibers having an immobilized organic phase within the pores of the hollow fibers. The permeable hollow fibers are generally in contact with an acidic aqueous feed on one side thereof and a strip solution on another side thereof. The systems and methods generally include the simultaneous extraction and stripping of rare earth elements as a continuous recovery process that is well suited for post-consumer products, end-of-life products, and other recovery sources of rare earth elements.

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):
9,968,887
Application Number:
14/724,985
OSTI ID:
1438367
Country of Publication:
United States
Language:
English

References (4)

Rare-earth metal-ion separation using a supported liquid membrane mediated by a narrow rim phosphorylated calix[4]arene journal June 1998
Recovery of nickel from a simulated electroplating rinse solution by solvent extraction and liquid surfactant membrane journal April 1995
Analysis of the transport rates of europium(III) across an organophosphinic acid supported liquid membrane journal February 1996
Separation of rare earth metals using a supported liquid membrane with DTPA journal July 1995

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