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2020-05-11 Science & Technology
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New Purdue technologies to extract, purify critical rare earth metals could be a ‘game changer' to advance, protect vital electronics
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The current challenge is that just one country, China, owns the market on extracting and purifying this critical resource despite the fact that other global countries, including the U.S., are rich in such metals. The detrimental environmental impact of current acid based separation and purification of rare earth metals prohibits most companies across the globe from entering the market.
New environmentally friendly technologies promise to be "game changers" in this field and enable the U.S. to create a more stable and reliable domestic source of these essential metals. Purdue University-patented extraction and purifying processes using ligand-assisted chromatography are shown to remove and purify such metals from coal ash, recycled magnets and raw ore safely, efficiently and with virtually no detrimental environmental impact.
"It’s a supply chain challenge with wide implications on the U.S. economy and national security. We have a critically needed product and one dominant source for this product. This new patented process promises to enable U.S. independence from the China near monopoly," said Dan Hasler, founder of Hasler Ventures. "This technology has been researched and developed at Purdue University for more than a decade and has proven to be versatile and robust."
"Conventional methods for producing high-purity rare earth elements employ two-phase liquid–liquid extraction methods, which require thousands of mixer-settler units in series or in parallel and generate large amounts of toxic waste," Wang said. "We use a two-zone ligand-assisted displacement chromatography system with a new zone-splitting method that is producing high-purity (>99%) metals with high yields (>99%)."
Wang's ligand assisted method has the potential for efficient and environmentally friendly purification of the rare earth metals from all sources of recyclates, such as waste magnets and ore-based sources and helps transform rare earth processing to a circular, sustainable process. 
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Posted by Phusotle Dingle5823 2020-05-11 18:44||
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