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Acid-Free Dissolution and Separation of Rare-earth Metals
Category(s):
For Information, Contact:
Craig Forney
Commercialization Manager, Chemistry and Materials Sciences
515-294-4740
licensing@iastate.edu
Web Published:
12/16/2016
ISURF #
4443
Summary:
ISU and Ames Laboratory researchers have developed a method to effectively recycle rare earth elements through simple REDOX reactions allowing for aqueous processing. This replaces the need for dangerous and environmentally unfriendly acids.

Development Stage:
Description:
Rare earth elements (REE) have seen a sharp increase in use in a number of technical materials such as high density and high temperature tolerant permanent magnets, lamp phosphors, catalysts, rechargeable batteries and many other technologies related to a transition to a greener economy. With China controlling more than 90% of REE output and increasingly stringent export quotas, the world at large faces a risk of supply disruption. Recycling of spent materials is therefore crucially important. ISU researchers have developed a novel approach to recycling REEs (particularly neodymium and dysprosium) by dissolving REE containing metal scrap in a reducing aqueous solution. After simple processing of the solubilized material, pure REE-oxides can be recovered. Recovery yield of the REE-oxides are typically greater than 95%. The use of aqueous reduction to dissolve the REE replaces the need for environmentally unfriendly acid use.

Advantage:
• Cost effective and time efficient
• Environmentally friendly
• Expected to scale efficiently
• Applicable to small or large scale operation
Application:
Recycling rare earth elements
Patent Information:
*To see the full version of the patent(s), follow the link below, then click on "Images" button.

Patent:
Patent(s) applied for

Direct Link: