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Methods of recovering rare earth elements from a material

Patent ·
OSTI ID:1632428
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A method of recovering rare earth elements from a rare earth-containing material comprises contacting the rare earth-containing material with a solution formulated and configured to dissolve rare earth elements from the rare earth-containing material and form a solution including a plurality of rare earth elements dissolved therein. The method further includes exposing the solution including the plurality of rare earth elements dissolved therein to one of a liquefied gas or a supercritical fluid to isolate the rare earth elements from each other. Related methods of removing and purifying rare earth elements from materials and phosphor lamps are also disclosed.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-05ID14517
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
Patent Number(s):
10,533,239
Application Number:
15/340,610
OSTI ID:
1632428
Country of Publication:
United States
Language:
English

References (3)

Supercritical fluid extraction of rare earth elements from luminescent material in waste fluorescent lamps journal March 2005
Recycling of rare earths: a critical review journal July 2013
Extraction of Rare Earth Oxides Using Supercritical Carbon Dioxide Modified with Tri- n -Butyl Phosphate–Nitric Acid Adducts journal June 2016

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