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Evolution of Scandium Recovery Technology to Increase ...

After scandium(III) phosphate precipitation, the recovery and subsequent purification of the remaining REEs on the [Hbet-STFSI-PS-DVB] column were also examined, and resulted in a higher purity of ...

AU620948B2 - Recovery of scandium, yttrium and lanthanides ...

We report on the separation and recovery of scandium(III) from sulfate solutions using solvent extraction and a membrane transport system utilizing newly synthesized amic acid extractants. Scandium(III) was quantitatively extracted with 50 mmol dm–3 N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]glycine (D2EHAG) or N-[N,N-di(2 …

Separation and purification of scandium by solvent ...

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 pressure, a neutralizing step (S2) for adding a neutralizing agent to the ...

extraction of scandium - Chalk & Cork

Jun 01, 2011· Purification. 1. Introduction. Scandium is the 31st abundant element in the Earth's crust, with an average crustal abundance of 22 ppm (Hedrick, 2010b). Because it readily substitutes the major elements such as iron and aluminium, scandium rarely occurs in concentrated quantities, but distributes sparsely in trace amounts in rocks consisting of ...

US4965053A - 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 pressure, a neutralizing step (S2) for adding a neutralizing agent to the ...

AU2014263634B2 - Method for recovering scandium - Google ...

The separation and recovery of scandium and titanium from hydrolyzed sulfuric acid solution of titanium dioxide production using solvent extraction was investigated. Get Price. ... Separation and purification of scandium by solvent extraction and related technologies: …

US5019362A - Ion exchange method for the purification of ...

The current study puts the emphasis on developing a pyro-hydrometallurgical process, called acid baking–water leaching, to recover scandium and neodymium from blast furnace slag produced by the ironmaking industry. In this process, the feed is mixed with concentrated sulfuric acid, digested at 200–400 °C, and leach

US10570480B2 - Method for recovering scandium - Google Patents

Test results show scandium leaching recovery of 95.12% and the acid leaching residue with Sc2O3 content of 8.12 g/t are obtained, while the extraction of scandium is obvious.

(PDF) Extraction of scandium from scandium-rich material ...

[15] Thus it urges the further purification for selective recovery of scandium from the above leach liquor. Though, there have been ample of studies for recovery of Sc form various sources with ...

Separation and purification of scandium by solvent ...

Scandium Recovery Sources & Technology . Page 4 Scandium Performance Vs. Cost Dilemma For Against Cost Cost Cost Cost Cost Cost Cost Weight Reduction ... Refining Purification Manufacturing Recycled Product End use By-Products SCANDIUM PRODUCERS End …

Method for recovering scandium values from leach solutions ...

[10] Wang W W, Cheng C Y. Separation and purification of scandium by solvent extraction and related technologies: a review[J]. Journal of Chemical Technology and Biotechnology, 2011, 86(10): 1237. DOI: 10.1002/jctb.2655

Why Scandium Solvent Extraction Is Better Than Traditional ...

To recover the trace scandium from the waste acid, a process combining pre-enrichment and purification steps via solvent extraction using the extractant of bis-(2-ethylhexyl) phosphoric acid was ...

Recovery of scandium from white waste acid generated from ...

AU620948B2 AU45972/89A AU4597289A AU620948B2 AU 620948 B2 AU620948 B2 AU 620948B2 AU 45972/89 A AU45972/89 A AU 45972/89A AU 4597289 A AU4597289 A AU 4597289A AU 620948 B2 AU620948 B2 AU 620948B2 Authority AU Australia Prior art keywords scandium residue lanthanides yttrium chloride Prior art date 1988-12-30 Legal status (The legal status is an assumption and is not a …

Extraction of scandium from scandium-rich material derived ...

A study was carried out for recovery of scandium from KOH sub-molten salt (SMS) leaching cake of fergusonite. Major metals in the cake were rare earths (RE), K, Th, U and Ca, and minor metals were ...

AU2014263634B2 - Method for recovering scandium - Google ...

The invention provides a method for recovering scandium from an acidic solution containing scandium. The method having [a] a precipitation step wherein sodium sulfate is added into the acidic solution containing scandium to obtain a precipitate of a scandium double sulfate; [b] a neutralization step wherein pure water is added to the precipitate of a scandium double sulfate to dissolve the ...

Research on Scandium Recovery and Extraction Process ...

To recover the trace scandium from the waste acid, a process combining pre-enrichment and purification steps via solvent extraction using the extractant of bis-(2-ethylhexyl) phosphoric acid was ...

Selective extraction and recovery of scandium from sulfate ...

The invention provides a method for recovering scandium from an acidic solution containing scandium. The method having [a] a precipitation step wherein sodium sulfate is added into the acidic solution containing scandium to obtain a precipitate of a scandium double sulfate; [b] a neutralization step wherein pure water is added to the precipitate of a scandium double sulfate to dissolve the ...

Recovery of scandium and neodymium from blast furnace slag ...

[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 ...

Why Scandium Solvent Extraction Is Better Than Traditional ...

A study was carried out for recovery of scandium from KOH sub-molten salt (SMS) leaching cake of fergusonite. Major metals in the cake were rare earths (RE), K, Th, U and Ca, and minor metals were ...

Separation and Recovery of Scandium from Sulfate Media by ...

If there are significant amounts of uranium, thorium and rare earths in the ore body being leached, these can be concentrated up along with the scandium, requiring a secondary purification step. Scandium Recovery Using D2EHPA. The use of D2EHPA (di-2-ethylhexyl phosphoric acid) for recovery of scandium from solution has been known for many years.

From trace to pure: Recovery of scandium from the waste ...

Mar 01, 2018· The results showed that scandium and aluminum were difficult to separate using nitrogen-phosphorus-containing ampholite resins, with recovery of only 50% of scandium from bauxite residue at pH 0.9–1.5. Several extractants like P204, P507 and P350 are generally used to recover scandium from aqueous solution.

From trace to pure: Recovery of scandium from the waste ...

Aug 01, 2020· 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 concentrate. The scandium concentrate was generated from titanium white waste acid by extraction in a factory. The effects of the acidity, salting-out agent, extraction ...

(PDF) Separation and Recovery of Scandium from Sulfate ...

Recovery, 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.

Purification of scandium from concentrate generated from ...

This method maximizes recovery of scandium while maintaining purity. 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.

Recovery of scandium and neodymium from blast furnace slag ...

The current study puts the emphasis on developing a pyro-hydrometallurgical process, called acid baking–water leaching, to recover scandium and neodymium from blast furnace slag produced by the ironmaking industry. In this process, the feed is mixed with concentrated sulfuric acid, digested at 200–400 °C, and leach