2 days agoAs the demand for rare earth elements increases world-wide, so too do the mining activities associated with rare earth element extraction. Rare earth elements are …

Recovery of scandium, yttrium and lanthanides from zircon sand . United States Patent 5039336 . Abstract: This is a process for extracting scandium from zircon ore. It utilizes feeding zircon sand to a fluidized bed chlorinator at about 1000° C. to produce a vaporous (principally zirconium and silicon chlorides) phase and a solid residue and ...

and yttrium, several companies were considering scandium recovery in their project plans. Following the completion of a revised National Instrument 43–101-compliant feasibility study for its elk Creek polymetallic (niobium-titanium-scandium) project in Nebraska, Niocorp was seeking financing necessary to complete

A novel synergistic extraction system for the recovery of scandium (III) by Cyanex272 and Cyanex923 in sulfuric acid medium. Author links open overlay panel Jiashi Hu a b, Dan Zou ... (REE) along with yttrium and lanthanides because of the similar chemical properties with REEs. Scandium and its compounds have been found to have …

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 …

@article{osti_5637388, title = {Recovery of scandium, yttrium and lanthanides from zircon sand}, author = {Feuling, R J}, abstractNote = {This patent describes a process for extracting scandium from ore comprising zirconium silicate. It comprises feeding scandium-containing zircon ore to a fluidized bed chlorinator at 800{degrees} C …

The solvent extraction of scandium by the mixture of di- (2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP) has been investigated in the acidic leaching solution of vanadium slag ...

With growing demand for renewable and clean energy technologies, the need in rare earth metals is increasing. Scandium, which is often considered a rare earth element (REE), is a critical metal mainly used in …

The rare-earth elements denote a group of 17 elements that includes scandium, yttrium, and lanthanides (elements with atomic numbers 57–71). The term is not used because they are rare, since their concentration in the Earth's crust ranges from 150–220 ppm (copper is 55 ppm and zinc is 70 ppm, for instance), but due to their …

Feuling, R. J. Recovery of scandium, yttrium and lanthanides from titanium ore. (1991). Haslam, M. In Proceeding of ALTA 1999 Nickel/Cobalt Pressure Leaching & Hydrometallurgy Forum. (ALTA ...

Based on different stability of scandium and yttrium group sulfates, K 3 Sc(SO 4) 3 can be crystallized with scandium selective precipitation efficiency of 98% ... The enhanced selectivity of scandium recovery from a multi-component solution was evident by high values of separation coefficients, which achieved 4280 for separation …

Among elements in lower concentration, scandium and yttrium recovery percentage were close (8.96 and 8.81%, respectively), which indicates that both metals recovery is similar, although their concentrations are different. Iron and silicon are the elements in higher concentration (first and third) in BRM, and the irrecovery was 0.46 …

A pilot-plant process has been developed based on an innovative laboratory-scale method for the recovery of scandium that exists in economically interesting concentrations in red mud, the main ...

This work aimed at reviewing the literature on membrane applications to obtain critical metals—lithium (Li), cobalt (Co), and rare earth elements (scandium—Sc, …

At present, the main objects of scandium recovery in primary ores are phosphorite, some rare earth ores, mica ores, brown yttrium niobium ores and some tailings of titanium and iron …

DOI: 10.1016/J.HYDROMET.2017.10.026 Corpus ID: 102638367; Recovery of scandium from leaching solutions of tungsten residue using solvent extraction with Cyanex 572 @article{Nie2018RecoveryOS, title={Recovery of scandium from leaching solutions of tungsten residue using solvent extraction with Cyanex 572}, author={Huaping Nie and …

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. ... and titanium. Several elements are also present in minor concentrations, including scandium, yttrium, zirconium, and vanadium. Rare earth …

There is a dearth of data on rare earth elements (REE), yttrium and scandium in foods which extends also to baseline datasets for edible wild mushrooms, though this has started to change in the last decade. Concentrations and shale normalized patterns of REE and Y (REY) were studied by using inductively coupled …

Karavaiko et al. 32 studied the selectivity recovery scandium and yttrium ions from the acid solution by Saccharomyces cerevisiae and Aspergillus terreus via …

Feuling RJ (1991) Recovery of scandium, yttrium and lan-thanides from titanium ore. US Patent 5,049,363. 7. Gongyi G, Yuli C, Yu L (1988) Solvent extraction off scandium. from wolframite residue ...

Experimental study on extraction and recovery of scandium from tungsten residue [J]. Rare Metals and Cemented Carbides, 2015(5): 4–8. (in Chinese) ... PARISSAKIS G. Selective separation and determination of scandium from yttrium and lanthanides in red mud by a combined ion exchange/solvent extraction method [J]. …

Semantic Scholar extracted view of "Recovery of scandium from synthetic red mud leach solutions by solvent extraction with D2EHPA" by W. Wang et al. ... Selective separation and determination of scandium from yttrium and lanthanides in red mud by a combined ion exchange/solvent extraction method. M. Ochsenkühn-Petropulu, Th. …

The metals were recovered from organic phase by The same author (1991) wrote another patent (US 5039336) in stripping with a solutions containing hydrofluoric acid and phos- which the process for the recovery of scandium, yttrium and lan- phoric acid. thanides from zircon sand was described.

Yttrium and scandium, thanks to their chemical similarity to REE, are often considered in science and technology as belonging to the REE group. Though the REE market size is relatively small, these elements are critically important for some high-tech applications ... such streams are of interest as potential feeds for scandium recovery .

The process of claim 10, wherein said yttrium and lanthanides are leached by said acid with said scandium into said scandium-containing aqueous solution, which leaching is followed by contacting said aqueous solution with a polyalkyl -.phosphate-containing organic phase, to produce a scandium-containing organic phase and a yttrium and ...

The separation of yttrium has not been performed since the focus of the present study falls on opportunities in solvometallurgy for scandium recovery. However, it has been shown by the previous studies that yttrium can be well separated by gradient elution of the SILP with phosphoric acid. 17

Karavaiko et al. 32 studied the selectivity recovery scandium and yttrium ions from the acid solution by Saccharomyces cerevisiae and Aspergillus terreus via biosorption.

Bauxite residue is a high-iron waste of the alumina industry with significant contents of scandium, aluminum, and titanium. This study focuses on the recovery of Sc, Al, Ti, and Si from iron-depleted bauxite residue (IDBR) into valuable products. Iron depletion was carried out using reduction roasting followed by low-intensity magnetic …

@article{osti_4806474, title = {THE TECHNOLOGY OF SCANDIUM, YTTRIUM, AND THE RARE EARTH METALS. A LITERATURE SURVEY}, author = {Love, B}, abstractNote = {A survey has been made of the unclassified literature relating to the rare earth elements. The best available data were compiled from 939 references for the abundance and …

The leaching process with dilute HNO 3 was performed at pilot scale and optimized for the extraction of scandium from bauxite residue ( Ochsenkühn-Petropoulou et al., 2002 ). Xue et al. (2010) found that at a reaction temperature of 90 °C and an L/S ratio of 3:1, over 80% of the scandium in bauxite residue could be leached by H 2 SO 4.