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 …
READ MOREThe 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 …
READ MORED201 resin and P507 extractant diluted with sulfonated kerosene were used to respectively separate vanadium and scandium, and impurity ions from hydrochloric acid leaching solution of red mud. More than 99% of vanadium was selectively adsorbed from the hydrochloric acid leaching solution under the c …
READ MOREAluminium scandium (Sc) alloys are stronger, more corrosion resistant and more heat tolerant than classical aluminium alloys and allow for 3D . In particular, the aerospace industry benefits from better fuel efficiency due to lighter materials as well as the advantages of additive manufacturing. Howe
READ MOREScandium(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.
READ MOREWhen detaching scandium and thorium from the sulphuric leachate containing scandium and the nickel ore of thorium, so that the object that scandium recycles is become a system, can realize simplification and the high yield of process.The method of the present invention includes:Extraction process (S1), use the scandium extractant comprising amide derivatives, …
READ MOREAn improvement in purification of scandium through ion exchange chromatography is disclosed in which the oxidation potential of the eluting solution is altered by the addition of potassium chlorate or ammonium chloride so that removal of contaminants is encouraged. ... Recovery of scandium is improved by pumping dilute scandium over the …
READ MOREThe photonuclear production of no-carrier-added (NCA) Sc-47 from solid (TiO2)-Ti-Nat and the subsequent chemical processing and purification have been developed. Scandium-47 was produced by the Ti-48(gamma,p)Sc-47 reaction with Bremsstrahlung photons produced from the braking of electrons in a high-Z (W or Ta) convertor.
READ MOREAfter a single stage of leaching, extraction and stripping, nearly recovery of scandium as scandium oxide resulted, while the separation of magnesium from scandium …
READ MOREIn this study, production of 47 Sc radionuclide by irradiating the natural titanium dioxide powder (TiO 2) in the fast neutron flux (~3*10 13 ncm-2 s-1) for 4 days in Tehran Research Reactor (TRR, Iran) and separation from titanium target was investigated.The study showed the feasibility of production 47 Sc by TRR. The separation efficiency and radiochemical purity (ScCl 3) of radio …
READ MOREA 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 system.
READ MOREPurification. 1. Introduction. Scandium is the 31st abundant element in the Earth's crust, with an average crustal abundance of 22 ... In this paper, the metallurgical …
READ MOREThe 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 ...
READ MOREA conceptual process for Sc purification was put forward and proved. The total recovery yield of Sc in the whole process is 95%. Graphical abstract 10% D 2 EHPA - 5% …
READ MOREScandium level of 100 mg/kg makes possible for its full recovery through either solvent extraction or sorption on resin [45, 46]. The mineral composition of …
READ MOREThe 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 latter.
READ MOREUS4965053A - Ion exchange purification of scandium ... The present invention effectively recovers high-grade scandium from nickel oxide ores. The present invention includes a leaching step (S1) for charging nickel oxide ores and sulfuric acid into a pressurized container to cause solid-liquid separation of a leachate and a leaching residue under high temperature and high …
READ MOREAfter 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 ...
READ MOREThe 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 latter. …
READ MORE1. 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 Sc is a typical sparse lithophile element with extremely dispersed distribution and coexists with many other minerals, leading to its purification process very complex. Nowadays Sc is mainly …
READ MORERecovery, separation and purification of REE and scandium from multicomponent solutions are difficult practical tasks. The chemistry of the systems technologists have to deal with are very complicated. ... Metallurgical processes for scandium recovery from various resources: A review, Hydrometallurgy 108, 100-108 Borisenko, L. F. (1983), Raw ...
READ MOREAbstract. A process for recovering scandium from impure scandium bearing material, is described comprising: (a) contacting a solution of scandium which contains impurities, with a solvent impregnated resin consisting essentially of a solid polymeric medium in which is dispersed a liquid alkylphosphoric acid as a cation extracting agent to extract essentially all of the …
READ MOREOSTI.GOV Journal Article: THE EXTRACTION AND PURIFICATION OF SCANDIUM. THE EXTRACTION AND PURIFICATION OF SCANDIUM. Full Record; Other Related Research; Authors: Vickery, R C Publication Date: Sat Jan 01 00:00:00 EST 1955 Research Org.: Commonwealth Fertilisers and Chemicals Ltd., Melbourne, Australia
READ MOREThe present application provides a method for recovering scandium at high yield by separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium. The method comprises: (i) an extraction step comprising treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic …
READ MOREThe 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.
READ MOREIn all recovery and purification operations regarding scandium, iron was reported to be one of the most problematic elements. Thus, to propose an easier route to process scandium, iron content should be minimized in the solution beforehand. We determined that the easiest route to this purpose was the hydroxide precipitation.
READ MOREScandium recovery using a leaching/ion exchange process may be possible with efficiency higher than 90%. The greatest challenge is the occurrence of …
READ MOREscandium purification scandium purification Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number EP17766375.4A Other languages German (de) French (fr)
READ MORE@article{osti_6896888, title = {Process for recovering scandium from waste material}, author = {Kim, T K and McClintic, R P}, abstractNote = {A process for recovering scandium from impure scandium bearing material, is described comprising: (a) contacting a solution of scandium which contains impurities, with a solvent impregnated resin consisting essentially of a solid polymeric …
READ MOREDOI: 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 ...
READ MORENowadays 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 exhibited …
READ MOREThis method gave 90-97% overall 47Sc recovery, with a Ti separation factor greater than 2.4 x 10(-5), and specific activities > or = 0.9 GBq microgram-1. Use of the 47Sc product, for labeling monoclonal antibodies, resulted in consistent labeling yields of > or = 90%. ... Scandium / isolation & purification* Scandium / therapeutic use ...
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