Recovery of scandium from sulfation-roasted leachates of bauxite residue by solvent extraction with the ionic liquid betainium bis(trifluoromethylsulfonyl)imide

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• 作者：Bieke Onghena^a ; Chenna Rao Borra^b ; Tom Van Gerven^b ; Koen Binnemans^a ; ^{Koen.Binnemans@kuleuven.be}
• 关键词：Scandium ; Solvent extraction ; Ionic liquids ; Bauxite residue ; Red mud ; Multi-stage leaching
• 刊名：Separation and Purification Technology
• 出版年：2017
• 出版时间：4 April 2017
• 年：2017
• 卷：176
• 期：Complete
• 页码：208-219
• 全文大小：1679 K
• 卷排序：176

文摘

A full process was designed to recover scandium from bauxite residue. Scandium is leached by sulfation-roasting-leaching and multi-stage leaching. [Hbet][Tf2N] was used for the extraction of scandium from the leachate. Separation between Fe and Sc was improved by reduction of Fe(III) to Fe(II).