An 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 ...
Wang and Cheng reviewed the separation and purification of scandium by synergistic solvent extraction and solvent extraction with chelating extractants, focusing on their recovery performance as well as their extraction mechanisms. In addition, ion exchange and liquid membrane extraction for scandium recovery were also discussed.
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 …
The deep removal of Al, Fe (Ⅱ/Ⅲ), Ca, Zr, Ti and Si from scandium chloride solution was carried out by using 732-type strong acid cation exchange resin. The effects of pH value, contact time and complexing agents (EDTA) on the purification process are investigated. The results indicate that the 732-type resin have a good scandium ...
The scandium is subsequently recovered by passing a solution of ammonium nitrate through the strong cation exchange column. The scandium contained in the ammonium nitrate solution is precipitated by addition of oxalic acid. The precipitate is filtered, washed and dried leaving a solid of scandium oxalate.
Scandium is recovered using ion exchange utilising a chelating resin having iminodiacetic acid as a functional group. The eluate from the ion exchange process in neutralised to precipitate scandium hydroxide, then it redissolved in sulfuric acid and extracted from solution using D2EHPA (although an example using PC-88a is also …
Processing operations for scandium containing ores include leaching, solution purification, ion exchange chromatography, solvent extraction, and precipitation. Although previous studies were more focused on solvent extraction, ion exchange applications have also emerged as an alternative pathway.
Understanding the challenges in scandium sourcing, recovery and purification processes, and alloying methods, a vertically integrated solution has been …
Abstract. 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 …
Zhu et al. [75] have separated scandium from hydrochloric acid leachate of red mud with an anion exchange resin and an acid extract combining ion exchange and solvent extraction, more than 99 % of scandium was extracted via 15 % P507 at pH 0.2, and less than 10 % iron and aluminum were co-extracted. However, ion exchange resin …
Understanding the challenges in scandium sourcing, recovery and purification processes, and alloying methods, a vertically integrated solution has been developed which includes a portfolio of technologies: (i) patented recovery of Sc from Sc-containing ores and industrial waste streams from ppm levels to 20–25% in the …
Recovery and purification of scandium from BR leachates is generally performed using either solvent extraction, ion-exchange chromatography, precipitation, or a combination of these techniques [9,23–28]. Ion-exchange chromatography has the advantage of high preconcentration factors [29–32].
Purification of scandium-containing streams is a challenging task. Unwanted elements, defined as impurities, are typically present in more than 10 times higher concentrations. ... Anastasia Pilichou, Efthymios Balomenos, and Dimitrios Panias. 2022. "Use of Ion-Exchange Resins to Adsorb Scandium from Titanium Industry's …
The technologies of solvent extraction, ion exchange, and liquid membrane for the separation and purification of scandium are reviewed. Acidic and neutral organo …
A solvent-assisted ligand exchange approach enables metal-organic frameworks with diverse and complex architectures ... C. Y. Separation and purification of scandium by solvent extraction and ...
The purification of scandium by displacement ion-exchange chromatog- raphy has been shown to be a practical method to obtain Sc^O^ of ultrahigh purity on a kilogram scale. However, it has also been demonstrated that great care must be given to the pH of the eluant, the temperature of the columns (resin), and to the oxidation …
DOI: 10.1016/j.jre.2020.02.008 Corpus ID: 214290939; Purification of scandium from concentrate generated from titanium pigments production waste @article{Zhou2020PurificationOS, title={Purification of scandium from concentrate generated from titanium pigments production waste}, author={Jie Zhou and Shun-yan …
Highly efficient recovery and purification of scandium from the waste sulfuric acid solution from titanium dioxide production by solvent extraction. Yedan Chen, Shuyi Ma, +4 …
ion exchange chromatography When applied to the purification of scandium, ion exchange chromatography involves packing a column with resin and the solution containing the scandium is passed over the resin. The eluent is then passed over the resin and a band of scandium spreads forward on the column. The amount of scandium at the front …
Scandium (Sc) is the most valuable element among the rare earth elements (REEs) because of its application in many cutting-edge technologies such as metal halide lamps, high strength Al-Sc alloys …
Semantic Scholar extracted view of "Highly efficient recovery and purification of scandium from the waste sulfuric acid solution from titanium dioxide production by solvent extraction" by Yedan Chen et al. ... The technologies of solvent extraction, ion exchange, and liquid membrane for the separation and purification of scandium are reviewed.
Purolite RUA21207 resin has high potential application in the purification of scandium concentrate from Zr and Ti by sorption and definitely can be used for providing high purity scandium oxide ...
Many efforts had been done by researchers in the past 30 years. In this review, we summarizes the typical methods of extracting scandium including solvent …
Semantic Scholar extracted view of "Selective ion-exchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions" by Dženita Avdibegović et al. ... Zhang and Junhua Xu and Mercedes Regad{'i}o and Risto T. Koivula and Koen Binnemans}, journal={Separation and …
2.1 Materials. Scandium chloride (ScCl 3, anhydrous, 99.9%), 0.5 M H 2 SO 4, and the water miscible organic additives were supplied by Fisher Scientific and used as received.TP 272 and VP OC 1026 were provided by LANXESS Corporation [].2.2 Loading/Elution Under Column Conditions. To load the resins in columns, resin beads (3 …
The lgD plot against lg[H 2 SO 4] for Sc(III) shows that the significant extraction of Sc(III) and less even no extraction for Th(IV), Fe(III) and Lu(III) with H[BTMPP] can be attained by controlling the aqueous H 2 SO 4 concentration. There are two extraction mechanism of Sc(III). The extraction proceeds according to a cation …
To further improve the purity of scandium, the further purification (Purification II process) was required. To verify this process design, we performed a bench-scale experiment to examine the process feasibility. The purity of scandium (%) in the acidic solution from the different solvent extraction circuits were shown in Fig. 8 B.
In this paper, the separation and purification methods of scandium using acidic, basic, neutral, and chelating extractants as well as synergetic solvent extraction procedures were discussed. ... which are extracted by amines via anion exchange processes. Scandium from uranium mill waste solutions was successfully extracted …
Journal Article: UTILIZATION OF AMINO-POLYACETIC ACID FOR THE PURIFICATION OF SCANDIUM BY ION EXCHANGE. UTILIZATION OF AMINO-POLYACETIC ACID FOR THE PURIFICATION OF SCANDIUM BY ION EXCHANGE (in French) Full Record; Other Related Research; Authors: Iya, V K; Loriers, J Publication Date:
An 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. The temperature, pH and concentration of the eluent HEDTA are controlled in ...
The cation exchange chromatography was used for chemical separation of radio-scandium from other elements. The glass column (1.2 cm×4 cm) was filled with cation exchange resin (Dowex 50W-X8) and 2 M HCl solution was passed through it.After the dissolution of natural titanium dioxide powder in hot and concentrated sulfuric acid, it was …
Patent: Ion exchange purification of scandium ...
The effect of the strong acid styrene type cation exchange resin on deep purification of scandium chloride solution was studied under the different pH value, contact time and the complexant of EDTA.
In order to reduce the contamination of scandium oxide products, the present disclosure provides a process for removing at least one metal contaminant from a scandium (Sc) concentrate. The process is based on contacting the Sc concentrate with an ion exchange resin to obtain a purified Sc eluate or raffinate. The first ion exchange resin and the …
In this work, the scandium concentrate generated from acid waste of titanium white production has been dissolved in 25 g L −1 H 2 SO 4. Then, the solution has been passed through a column loaded with Purolite RUA21207 resin. Purification of scandium by 147 times that of zirconium and more than twice that of titanium have been …
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.
Among the technologies for the separation and purification of aqueous solutions, ion exchange (IX) has some benefits compared with SX techniques: less contamination of the pregnant solution, lower operation costs [18], etc., and thus, it has attracted a lot of attention for scandium extraction [7,15,17–27].
This paper discusses recent developments and tendencies in scandium separation, purification and preconcentration from different wastes, residues, …
The ion exchange method is an important means to purify and refine scandium. In most of the separation methods, the separation factors of scandium and other rare earth elements are less than 20, while those of the ion exchange method are as high as hundreds or even thousands, so they can be used for final scandium purification.
