Hedwig, Sebastian

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Hedwig
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Sebastian
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Hedwig, Sebastian

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From trace to pure. Pilot-scale scandium recovery from TiO2 acid waste

2023-04-06, Hedwig, Sebastian, Yagmurlu, Bengi, Peters, Edward Michael, Misev, Victor, Hengevoss, Dirk, Dittrich, Carsten, Forsberg, Kerstin, Constable, Edwin C., Lenz, Markus

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Nanofiltration-enhanced solvent extraction of scandium from TiO acid waste

2022-04-27, Yagmurlu, Bengi, Huang, Danyu, von Arx, Oliver, Dittrich, Carsten, Constable, Edwin, Friedrich, Bernd, Hedwig, Sebastian, Lenz, Markus

Scandium is a critical raw material with a technological potential to reduce transportation costs and CO2 emissions. However, global supply and market adoption are crucially impaired by the lack of high-grade Sc ores and recovery strategies. A tandem nanofiltration solvent extraction route is demonstrated to enable effective Sc recovery from real-world acid waste from the chloride TiO2 production route. The process involving several filtration stages, solvent extraction, and precipitation was optimized, ultimately producing >97% pure (NH4)3ScF6.