Method for separating and refining scandium
US-2015184268-A1 · Jul 2, 2015 · US
Extraction/separation method
US9822428B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9822428-B2 |
| Application number | US-201514848537-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 9, 2015 |
| Priority date | Sep 10, 2014 |
| Publication date | Nov 21, 2017 |
| Grant date | Nov 21, 2017 |
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- Title
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Abstract
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The inventive extraction/separation method involves the step of contacting an organic phase containing a dialkyldiglycol amic acid extractant: R 1 R 2 NCOCH 2 OCH 2 COOH with an aqueous solution containing scandium and zirconium and/or hafnium for thereby extracting zirconium and/or hafnium into the organic phase. The purity of scandium can be efficiently increased by the simple step of solvent extraction.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for separating a second element from an aqueous solution by solvent extraction, said aqueous solution containing scandium as a first element and each or both of zirconium and hafnium as the second element, the method comprising the step of contacting the aqueous solution as an aqueous phase with an organic phase containing a dialkyldiglycol amic acid having the general formula (1): R 1 R 2 NCOCH 2 OCH 2 COOH (1) wherein R 1 and R 2 are each independently a straight or branched alkyl group, at least one of R 1 and R 2 being an alkyl group of at least 6 carbon atoms, as an extractant, for thereby extracting the second element into the organic phase. 2. The method of claim 1 wherein the aqueous solution is an acidic aqueous solution at or below pH 3. 3. The method of claim 1 wherein the extractant is N,N-di-2-ethylhexyl-3-oxapentane-1,5-amic acid corresponding to formula (1) wherein both R 1 and R 2 are C 4 H 9 CH(C 2 H 5 )CH 2 —. 4. The method of claim 1 wherein the step of contacting the aqueous solution with the organic phase is conducted in a countercurrent multistage mixer settler.
Assignees
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Classifications
- C22B59/00Primary
Obtaining rare earth metals · CPC title
Obtaining zirconium or hafnium {(treatment or purification of solutions by liquid-liquid extraction, by ion exchange or by adsorption C22B3/00, C01G25/003, C01G27/003)} · CPC title
- B01D11/04Primary
of solutions which are liquid · CPC title
Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9822428B2 cover?
- The inventive extraction/separation method involves the step of contacting an organic phase containing a dialkyldiglycol amic acid extractant: R 1 R 2 NCOCH 2 OCH 2 COOH with an aqueous solution containing scandium and zirconium and/or hafnium for thereby extracting zirconium and/or hafnium into the organic phase. The purity of scandium can be efficiently increased by the simple step of solvent…
- Who is the assignee on this patent?
- Shinetsu Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C22B59/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 21 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).