Recovery of scandium from white waste acid generated …
· Scandium recovery and purification were performed in detail by solvent extraction with TRPO from both the scandium sulfate solution and sulfuric acid leaching solution of Sc …
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Separation and purification of scandium by solvent …
· [4] Scandium is a rare element and is a very expensive metal due to its scarcity and to the rather complicated metallurgical processes for its purification and recovery. [5] …
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Scandium Recovery Methods from Mining, Metallurgical …
· The recovery of scandium (Sc) from wastes and various resources using solvent extraction (SX) was discussed in detail. Moreover, the metallurgical extractive procedures for Sc recovery were presented. ... the separation and purification processes of Sc are difficult tasks. Sc has also been extracted from acidic solutions using carboxylic acids ...
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Separation and purification of scandium by solvent …
· [4] Scandium is a rare element and is a very expensive metal due to its scarcity and to the rather complicated metallurgical processes for its purification and recovery. [5] Scandium is used in a ...
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Separation and purification of scandium by solvent …
· The technologies of solvent extraction, ion exchange, and liquid membrane for the separation and purification of scandium are reviewed. Acidic and neutral organo-phosphorus extractants are most widely used in practice, with high extraction efficiencies. Their disadvantages originate from the high stripping acidity required for the former and the poor selectivity for the …
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Development of Scandium-Recovery Process from …
· The starting material for scandium recovery is slurry of chlorination residue that is obtained from a repulped chlorination residue with industrial water (this residue was provided by Toho Titanium Co ., Ltd.). Reagents, such as 35% hydrochloric acid (HCl), 24% sodium-hydroxide solution, bis(2-ethylhexyl) phosphate (D2EHPA), tributyl phosphate ...
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Scandium Recovery Methods from Mining, Metallurgical …
· After one SX with the C272, C302, and C301 extractants, the scandium recovery effi- ciency was about 82%, 78%, a nd 75%, respectively, with concentrati ons of sulfuric acid of 1.5, 3.5 and 5.8 mol ...
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From trace to pure: Recovery of scandium from the waste …
· Currently, acid waste of titanium white production and uranium ores are considered as the primary resources of scandium, leading to many investigations devoted to the recovery and purification of ...
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Recovery of scandium from white waste acid generated …
· Semantic Scholar extracted view of "Recovery of scandium from white waste acid generated from the titanium sulphate process using solvent extraction with TRPO" by Jie Zhou et al.
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Recovery of scandium from red mud by leaching with
· Recovery of scandium (Sc) from various wastes is generally one strategy to solve potential supply shortage problems of Sc. This work proposes a synergistic process for co …
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Separation and recovery of scandium and titanium from
· The scandium in the filtrate after the recovery of titanium can be finely extracted with P507, and 99.79% scandium can be extracted by single-stage extraction under the P507 concentration of 15% ...
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Recovery of Scandium(III) from Aqueous Solutions by …
· Separation and Purification Technology 2019, 209, 789-799. DOI: 10.1016/j.seppur.2018.09.020. Nicolas Schaeffer, Helena Passos, Isabelle Billard, Nicolas Papaiconomou, João A.P. Coutinho. ... Recovery of scandium from sulfation-roasted leachates of bauxite residue by solvent extraction with the ionic liquid betainium bis ...
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Ion exchange method for the purification of scandium …
· The U.S. Department of Energy's Office of Scientific and Technical Information
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Separation and purification of scandium: From industry to …
· Scandium recovery using a leaching/ion exchange process may be possible with efficiency higher than 90%. The greatest challenge is the occurrence of silica gel formation during leaching. View
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Separation and purification of scandium by solvent
· Separation and purification of scandium by solvent extraction and related technologies: a review Wang, Weiwei; Cheng, Chu Yong 00:00:00 INTRODUCTION Scandium is a rare element, and is a very expensive metal due to its scarcity and to the rather complicated metallurgical processes for its purification and recovery. In 2009, the price ...
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[PDF] Recovery of scandium from sulfation-roasted …
DOI: 10.1016/J.SEPPUR.2016.12.009 Corpus ID: 99988826; Recovery of scandium from sulfation-roasted leachates of bauxite residue by solvent extraction with the ionic ...
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PURIFICATION OF SCANDIUM OXIDE - JP2890830B2 ...
· Then the hydroxides of impurity elements or carbonate precipitate is filtered off and scandium oxide is recovered from the filtrate. An uranium leached solution and a leached …
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Recovery of Scandium by Crystallization Techniques
· The current state-of-the-art in the recovery of scandium from metallurgical waste streams involves leaching to extract scandium from the waste stream, e.g., bauxite ... Vickery …
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Purification of scandium from concentrate generated from …
· 1. Introduction. Scandium (Sc), a member of rare earth elements, with an average crustal abundance of 22 ppm in the earth, is ranked the 31st in the earth's richest elements. 1 …
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Ion exchange method for the purification of scandium
The scandium is precipated from the ammonium nitrate by adding oxalic acid. The precipate of scandium oxalate is collected by filtration and rinsed. The precipate is calcined at approximately 975° C. to form scandium oxide. This process is applicable to the recovery and purification of scandium from any acid soluble matrix.
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Separation and purification of scandium: From industry to …
Scandium and its compounds are used in many modern industrial fields due to its unique chemical and physical properties. It is mainly recovered from residues and wastes in the production of other metals. The exploitation of the ores and wastes could contaminate water and soil creating environmental problems. This paper discusses recent developments and …
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Separation and purification of scandium by solvent …
Scandium(III) extractions are interfered with by commonly associated elements such as iron(III), zirconium(IV), titanium(IV), thorium(IV), yttrium(III) and lanthanides(III). The advantages and disadvantages of applications of ion exchange and liquid membrane technologies for scandium recovery are reviewed and compared with solvent extraction.
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A novel synergistic extraction system for the recovery of …
· A novel synergistic extraction system for the recovery of scandium (III) by Cyanex272 and Cyanex923 in sulfuric acid medium. Author links open overlay panel ... and Cyanex923 (purity ≥ 93%) were obtained from Cytec Industry Inc without purification or saponification. The extratants were dissolved in n-heptane (purity ≥ 99%) to prepare the ...
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Recovery of Scandium by Crystallization Techniques
· The current state-of-the-art in the recovery of scandium from metallurgical waste streams involves leaching to extract scandium from the waste stream, e.g., bauxite ... Vickery RC (1955) The extraction and purification of scandium. J Chem Soc 245–251. Shaoquan X, Suqing L (1996) Review of the extractive metallurgy of scandium in China (1978 ...
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PURIFICATION OF SCANDIUM OXIDE - JP2890830B2 ...
· Then the hydroxides of impurity elements or carbonate precipitate is filtered off and scandium oxide is recovered from the filtrate. An uranium leached solution and a leached solution obtained from Ti slag or Sn slag, industrial recovery target raw materials, are usable as the solution containing Sc and elements of impurities.
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Purification of scandium from concentrate generated from …
Abstract Nowadays 80% of scandium in China is obtained from titanium pigments production waste through a complex purification process. The study mainly focused on the purification of Sc from its concentrate generated from titanium pigments production waste by solvent extraction. Several extractants have been tried and 10% D2EHPA - 5% TBP - 85% sulfonated kerosene …
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Leaching characteristics of Sc-enriched, Fe-depleted acidic …
Recovery of scandium and neodymium from blast furnace slag using acid baking-water leaching RSC Adv., 10 ( 53 ) ( 2020 ), pp. 31936 - 31946, 10.1039/d0ra05797e View Record in Scopus Google Scholar
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Highly efficient recovery and purification of scandium
· After a single stage of leaching, extraction and stripping, nearly recovery of scandium as scandium oxide resulted, while the separation of magnesium from scandium was also nearly . About ...
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Recovery of scandium from synthetic red mud leach …
· The extraction of scandium from an Australian red mud by selective acid leaching has been explored and the recovery of scandium from a synthetic leach solution using solvent …
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Scandium Recovery Methods from Mining, Metallurgical …
· After one SX with the C272, C302, and C301 extractants, the scandium recovery effi- ciency was about 82%, 78%, a nd 75%, respectively, with concentrati ons of sulfuric acid of …
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From trace to pure: Recovery of scandium from the waste …
· Currently, acid waste of titanium white production and uranium ores are considered as the primary resources of scandium, leading to many investigations devoted to the recovery …
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Scandium Recovery Methods from Mining, Metallurgical …
· Scandium of high purity (99.9%) and high scandium recovery (90%) were obtained using the two SX techniques described above. Cation exchange mechanisms such as ScA 3 …
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