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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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@article{deVargasBrio2022AdsorptionPF, title={Adsorption potential for the concentration and recovery of rare earth metals from NdFeB magnet scrap in the hydrometallurgical route: A review in a circular economy approach}, author={Giani de Vargas Bri{~a}o and Meuris Gurgel Carlos da Silva and Melissa Gurgel Adeodato …
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Recovery of scandium from titanium white waste acid is an essential source of scandium. Simple and economical production of high purity scandium remains a challenge. A new extractant, N,N,N',N'-tetracyclohexyl-diglycolamide (TCHDGA), was synthesized, and the separation performance of scandium from impurity metal ions (Ti, …
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Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. Scandium is a rare-earth metal, used in small amounts but with drastic effects on properties of matter.
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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.
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A novel Cyanex923-N1923 synergistic extraction system was proposed for recovery of Sc. • The extracted complex formed because of N-H + ⋯O P and R max was calculated to be 2.20.. 95% stripping rate of Sc can be achieved by only 2 mol·L −1 HNO 3 solution.. The problem of Sc stripping difficulty can be solved well by the synergistic …
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A reagent-impregnated resin prepared from 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (PC-88A) and Amber-lite XAD-7 beads was examined in order to apply it to the selective recovery of scandium.
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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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However, scandium recovery was lower compared with raw bauxite residue, maybe due to its chemical association between iron and titanium (Rivera et al., 2017). Borra et al. (2015) studied alkalinity removal by water washing, resulting in 10–15% of sodium extraction after four steps. The low efficiency may be due to the fact that sodium is ...
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After the further two solvent extraction circuits, the purity of scandium significantly increased to 99.9% (as Sc 2 (SO 4) 3) which higher than the purity (94%) in the research of recovery scandium form acidic solution (Le et al., 2018). In addition, the yield of scandium in the three circuit were 98%, 94% and 92% and an overall yield of 87% ...
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The Future of Scandium Recovery from Wastes. Olga Chernoburova, A. Chagnes. Published in Materials Proceedings 3 December 2021. Environmental Science, Materials Science, Engineering. With growing demand for renewable and clean energy technologies, the need in rare earth metals is increasing. Scandium, which is often …
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Rare earth elements (REEs) and Sc are concentrated in aluminum production byproducts. The novel REEs recovery approach, which involves leaching with acid at a pH > 3 in the presence of MgSO4, results in the formation of a pregnant leach solution (PLS) with a low concentration of iron (Fe) and titanium (Ti) and a large number …
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As for the scandium, there is a slight increase in the recovery from 45.5 to 49.6 wt% from 40 to 50 min; then the recovery stables at ~50 wt% as the roasting time is extended to 60 min. The longer roasting time will result to the less soluble of sodium by ~7 wt% compared the recovery of 40 min roasting time sample with 60 min one.
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The global production rate of scandium is estimated at about 10–15 tonnes per year (U.S. Geological Survey, 2019) However, considering the global annual market for aluminum, if only a small fraction of Al (0.1%) absorbs scandium in alloys at a level of 0.5%, the annual global demand for scandia will increase to 350–400 tonnes (Reid et al ...
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Scandium (Sc), known as the 'miracle metal', has unique properties in material sciences, and is a critical resource in the world due to the low supply but wide applications in advanced technology. ... Besides, the development in recovery technology lowers the cut-off grade of the 'hard-rocks', such that Sc-rich clinopyroxene- and …
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Therefore, new strategies for scandium recovery are of economic priority. In this study, polymer inclusion membranes (PIMs) consisting of PVDF-HFP, 2-NPOE and DEHPA, were optimised for selective scandium separation from real TiO 2 production waste. With the optimised system, >60% of the scandium was recovered with high …
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Scandium is an important member of rare earths and always associated with other metals. A novel aminophosphonate compound di-(2-ethylhexyl)[N-(2-ethylhexyl) amino methyl] phosphonate (Cextrant 230, L) was applied for the selective extraction and recovery of scandium from sulfate medium.The extraction mechanism was determined …
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Few review articles have been published on scandium separation and recovery from different sources [12, [17][18][19][20]. Wang and Cheng [12] reviewed the separation and purification of scandium ...
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the recovery and coal of scandium ash are reported. as one of The the review final products only concerned of the operation. the technologies allowing the recovery of scandium as one of the final products of the operation. 3. Bauxite Residue. Bauxite residue (BR) is waste generated during alumina production via the Bayer process.
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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 complex formation and HA molecule entry into the complex can both be used to extract scandium from low-acid solutions by carboxylic acids (HA) and produce adducts …
DetailsThe 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 extraction studied. Preliminary leaching tests showed that H 2 SO 4 performed best with highest scandium leaching efficiency amongst the three mineral …
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In this study, a scandium concentrate with Sc2O3 content of 66.24 g/t was obtained from V-Ti magnetite tailings by physical concentration, and the main Sc-bearing minerals were augite and hornblende. A novel process of roasting and leaching was proposed to extract scandium from scandium concentrate with titanium dioxide …
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The recovery of scandium elements from tailings has been studied. Red mud is a scandium resource. Through the combined process of sulfur roasting–water leaching, the leaching rate of scandium can reach 91.98%. The bauxite residue is directly leached by phosphoric acid, and the results show that when the molar concentration of …
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The recovery of scandium from a synthetic leach solution of the red mud using solvent extraction was studied. A number of extractants were investigated for the extraction of scandium and its separation from the other metals in the synthetic leach solution. It was found that amongst the three acidic organophosphorus extractants …
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Scandium is challenging and expensive to isolate in pure form using conventional solvent extraction. Now a covalent organic framework (COF) has been synthesized that can incorporate scandium ...
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In this paper, the scandium recovery from an Australian red mud with selective acid leaching, solvent extraction and precipitation has been reported and a conceptual process flowsheet for scandium recovery from red mud has been proposed. 2. Experimental 2.1. Red mud sample The composition of the red mud from an alumina refinery of Australia is ...
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The recovery of scandium from Greek BR can be an excellent approach for waste management and resource efficiency of the waste using environmentally friendly biometallurgical methods.
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Bauxite residues, i.e., red mud, can be processed to recover various valuable end products, while reducing the environmental impact of the waste. Scandium is one of the valuable elements in bauxite residues. It is possible to extract and enrich scandium from red mud by leaching and solvent extraction. Scandium can then be recovered from …
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Experimental Procedure. Scalmalloy® powder, which was designed to be used in additive layer manufacturing, was used as the source mate-rial, and the composition was given in Table 1. It contains aluminium, magnesium, manganese, scan-dium, and zirconium. The particle size of the powder was between 10 and 120 lm.
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One of the main applications of scandium is its alloying into aluminum and magnesium products, to make them weldable, more corrosion resistant, and stronger (Ahmad, 2003).One of the main interests of Al-Sc alloys is in the aerospace industry because the capacity to make use of weldable structures could significantly reduce the …
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In this work, we propose a novel highly efficient recovery of Sc through crystallization of scandium sulfates from the leachate of scandium concentrate produced by carbonation of red mud according to a new technology schematically depicted in Fig. 1.Previously, we have developed a technologically feasible dissolution of a part of …
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SMM to Construct Scandium Recovery Pilot Plant Sumitomo Metal Mining Co., Ltd. (SMM) has decided to construct a scandium recovery pilot plant at Coral Bay Nickel Corporation (CBNC), its majority owned subsidiary located on Palawan Island in the Philippines. Scandium (Sc) is a rare earth element discovered in 1879. A silvery-white metal with a
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Thus, scandium is generally recovered from secondary raw materials or by prod ucts from. the production of uranium, nickel laterites or titanium diox ide pigment processing. Recovery of scandium ...
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You are constructing a concentration cell containing S c s S c + (a q) at 2 5 ° C. In one compartment of the cell, [S C +] = 0. 0 5 0 0 M. What concentration of scandium ions must be present in the other compartment in order for the cell to generate 0. 0 3 0 0 V of potential? If the answer cannot be determined, draw a frowny face ...
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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. Acidic and neutral organophosphorus (OPCs) extractants are the most extensively used in industrial activities, considering that they provide the ...
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We retrieved the literature records in Web of science with the keywords "scandium", "separation" and "extraction", and performed the data analysis of the relevant articles (Fig. 1).The annual published articles increased from 1967 to 2022 (Fig. 1 (c)).In the keyword word frequency heat map (Fig. 1 (a)) and its co-occurrence relationship …
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The results show that the resin has potential for use in the recovery of scandium from aqueous solutions generated in the processing of monazite. View. Show abstract.
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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-recovery of Sc by using the acid titanium white waste acid (TWWA) to leach the basic red mud, to which the acidity was adjusted with concentrated sulfuric acid when …
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