by V.L. Leotaud, May 10, 2020 in MiningCom
Researchers at Purdue University in the US have developed a new technology that promises to be a game-changer in the extraction of rare earths.
In a paper published in the journal Green Chemistry, the scientists explain that the patented extraction and purifying processes use ligand-assisted chromatography and are shown to remove and purify rare earth metals from coal ash, recycled magnets and raw ore safely, efficiently and with virtually no detrimental environmental impact.
This is key because, at present, many companies across the world don’t even dare to consider extracting REE due to the damages caused to the environment by acid-based separation and purification of these elements.
“About 60% of rare earth metals are used in magnets that are needed in almost everyone’s daily lives. These metals are used in electronics, aeroplanes, hybrid cars and even windmills,” Nien-Hwa Linda Wang, whose lab developed the technology, said in a media statement. “We currently have one dominant foreign source for these metals and if the supply were to be limited for any reason, it would be devastating to people’s lives. It’s not that the resource isn’t available in the US, but that we need a better, cleaner way to process these rare earth metals.”
Neodymium magnets. (Image by Nevit Dilmen, Wikimedia Commons).