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US5492680A Separation of scandium from tantalum residue using fractional liquid-liquid extraction 失效
$Separation of scandium from tantalum residue using fractional liquid-liquid extraction$
标题翻译：使用分数液 - 液萃取法从钽渣中分离钪
公开(公告)号：US5492680A
公开(公告)日：1996-02-20
申请号：US285676
申请日：1994-08-04
申请人： Michael D. Odekirk
发明人： Michael D. Odekirk
IPC分类号： C01F17/00 , C22B59/00
CPC分类号： C22B59/00 , C01F17/0006 , Y02P10/212 , Y10S210/912
摘要： A process for separating scandium from an aqueous solution comprised of a first group of metals, scandium and a second group of metals includes the steps of: (a) providing a scandium-containing material and preparing therefrom an aqueous sulfuric acid solution containing a first group of metals, scandium and a second group of metals; (b) contacting the aqueous sulfuric acid solution with an organic liquid solution whereby scandium and the first and second groups of metals are extracted into the organic liquid solution to create a loaded organic solution; (c) scrubbing the loaded organic liquid solution first with an sulfuric acid solution to remove selected metals in the first group of metals from the organic liquid solution and then with a dilute HF solution to prepare the organic liquid solution for stripping; (d) stripping the remaining metals in the first group of metals from the loaded organic liquid solution with a HF solution so that only scandium and the second group of metals remain on the organic liquid solution; and (e) using a fractional stripping system to strip scandium from the loaded organic liquid solution with a HF solution so that the scandium is released from the organic liquid solution and only the second group of metals remains on the organic liquid solution.
摘要翻译：从由第一组金属，钪和第二组金属组成的水溶液中分离钪的方法包括以下步骤：（a）提供含钪材料并由其制备含有第一组的硫酸水溶液的金属，钪和第二组金属; （b）使硫酸水溶液与有机液体溶液接触，由此将钪和第一和第二组金属萃取到有机液体溶液中以产生负载的有机溶液; （c）首先用硫酸溶液洗涤负载的有机液体溶液，以从有机液体溶液中除去第一组金属中的选定金属，然后用稀HF溶液制备用于汽提的有机液体溶液; （d）用HF溶液从装载的有机液体溶液中剥离第一组金属中的剩余金属，使得仅有钪和第二组金属保留在有机液体溶液上; 和（e）使用分级汽提系统用HF溶液从加载的有机液体溶液中剥离钪，使得钪从有机液体溶液中释放，并且仅第二组金属保留在有机液体溶液上。

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