Selective extraction and recovery of scandium from sulfate medium by Cextrant 230

Le, Weihua; Kuang, Shengting; Zhang, Zhifeng; Wu, Guolong; Li, Yanling; Liao, Chunfa; Liao, Wuping

doi:10.1016/j.hydromet.2018.04.005

Cited by 36 publications

(15 citation statements)

References 23 publications

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“…The interference of Si(IV) was not studied because it is generally not present in the sulfuric acid leachate of Sc(III). 8,16,52,53 Figure 5 shows the plots of the degree of extraction of the metal ions listed above from a 0.1 mol dm –3 H 2 SO 4 /(NH 4 ) 2 SO 4 solution with 50 mmol dm –3 D2EHAG or D2EHAF as a function of the equilibrium pH.…”

Section: Resultsmentioning

confidence: 99%

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Separation and Recovery of Scandium from Sulfate Media by Solvent Extraction and Polymer Inclusion Membranes with Amic Acid Extractants

et al. 2019

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We report on the separation and recovery of scandium(III) from sulfate solutions using solvent extraction and a membrane transport system utilizing newly synthesized amic acid extractants. Scandium(III) was quantitatively extracted with 50 mmol dm–3N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]glycine (D2EHAG) or N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]phenylalanine (D2EHAF) in n-dodecane at pH 2 and easily stripped using a 0.5 mol dm–3 sulfuric acid solution. The extraction mechanisms of scandium(III) extraction with D2EHAG and D2EHAF were examined, and it was established that scandium(III) formed a 1:3 complex with both extractants (HR), that is, Sc(SO4)2–aq + 1.5(HR)2org ⇄ Sc(SO4)R(HR)2org + H+aq + SO42–aq. The equilibrium constants of extraction were evaluated to be 4.87 and 9.99 (mol dm–3)0.5 for D2EHAG and D2EHAF, respectively. D2EHAG and D2EHAF preferentially extracted scandium(III) with a high selectivity compared to common transition metal ions under high acidic conditions (0 < pH ≤ 3). In addition, scandium(III) was quantitatively transported from a feed solution into a 0.5 mol dm–3 sulfuric acid receiving solution through a polymer inclusion membrane (PIM) containing D2EHAF as a carrier. Scandium(III) was completely separated thermodynamically from nickel(II), aluminum(III), cobalt(II), manganese(II), chromium(III), calcium(II), and magnesium(II), and partially separated from iron(III) kinetically using a PIM containing D2EHAF as a carrier. The initial flux value for scandium(III) (J0,Sc = 1.9 × 10–7 mol m–2 s–1) was two times higher than that of iron(III) (J0,Fe = 9.3 × 10–8 mol m–2 s–1).

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Section: Resultsmentioning

confidence: 99%

“…Co-extraction of Fe(III) along with Sc(III) is often reported, 7,8,15,16 and separation of these metal ions is challenging because of the same charge and closer values of hydration enthalpies. 54 Masking Fe(III) with orthophosphate 31 or reducing it to Fe(II) can eliminate co-extraction of Fe(III).…”

Section: Resultsmentioning

confidence: 99%

Separation and Recovery of Scandium from Sulfate Media by Solvent Extraction and Polymer Inclusion Membranes with Amic Acid Extractants

et al. 2019

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“…The next time uranium is cleaned, the scandium is separated. When processing uranium-containing leaching solutions, extraction and sorption methods are most often used to extract scandium [4][5][6][7][8][9][10][11][12][13].…”

Section: Investigationof Concentration Methods Of Scandium-containing mentioning

confidence: 99%

Investigationof Concentration Method of Scandium-Containing Solutions

Shokobayev¹,

Adelbayev²,

Abilmagzhanov³

et al. 2019

OF THE ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN

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“…In the similar extraction conditions used for Cextrant 230, the derivatives 12 and 9 showed similar extraction properties to Cextrant 230 towards REs and actinoids, as the extraction efficiency of metal ions decreased in the following order Ce( iv ) > Th( iv ) > Sc( iii ) > other RE( iii ). Interestingly, among 9 , 11 , and 12 , the last one was much more selective towards Ce( iv ) than Sc( iii ) and Th( iv ) [ 39 , 40 , 41 , 45 ]. Liao et al concluded that the bigger ionic radius of Th( iv ) hinders the simultaneous coordination of the P=O group and the nitrogen atom [ 41 ].…”

Section: The Short History Of α-Aminophosphonates -Phosphinates and -...mentioning

confidence: 99%

α-Aminophosphonates, -Phosphinates, and -Phosphine Oxides as Extraction and Precipitation Agents for Rare Earth Metals, Thorium, and Uranium: A Review

Virtanen

Moilanen

2022

Molecules

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α-Aminophosphonates, -phosphinates, and -phosphine oxides are a group of organophosphorus compounds that were investigated as extraction agents for rare earth (RE) metals and actinoids for the first time in the 1960s. However, more systematic investigations of their extraction properties towards REs and actinoids were not started until the 2010s. Indeed, recent studies have shown that these α-amino-functionalized compounds can outperform the commercial organophosphorus extraction agents in RE separations. They have also proven to be very efficient extraction and precipitation agents for recovering Th and U from RE concentrates. These actinoids coexist with REs in some of the commercially important RE-containing minerals. The efficient separation and purification of REs is becoming more and more important every year as these elements have a pivotal role in many existing technologies. If one also considers the facile synthesis of α-amino-functionalized organophosphorus extractants and precipitation agents, it is expected that they will be increasingly utilized in the extraction chemistry of REs and actinoids in the future. This review collates α-aminophosphonates, -phosphinates, and -phosphine oxides that have been utilized in the separation chemistry of REs and actinoids, including their most relevant synthetic routes and molecular properties. Their extraction and precipitation properties towards REs and actinoids are also discussed.

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Selective extraction and recovery of scandium from sulfate medium by Cextrant 230

Cited by 36 publications

References 23 publications

Separation and Recovery of Scandium from Sulfate Media by Solvent Extraction and Polymer Inclusion Membranes with Amic Acid Extractants

Separation and Recovery of Scandium from Sulfate Media by Solvent Extraction and Polymer Inclusion Membranes with Amic Acid Extractants

Investigationof Concentration Method of Scandium-Containing Solutions

α-Aminophosphonates, -Phosphinates, and -Phosphine Oxides as Extraction and Precipitation Agents for Rare Earth Metals, Thorium, and Uranium: A Review

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