(PDF) Studying the extraction of scandium (III) by …
This study aims to optimize the extraction efficiency of Sc(III) by dicyclohexano-18-crown-6 (DC18C6) and kryptofix 2.2.2 (K 2.2.2) macrocyclic compounds as novel extractants using response ...
Characterization of Bauxite Residue from a Press Filter …
The present study aimed at the scandium extraction from bauxite residue by H2SO4 and H3PO4 leaching. The use of H2O2 was evaluated to avoid silica gel formation. The effect of time, temperature ...
A systematic study on extraction and separation of scandium …
Table 3 summarizes the most recent studies and research on the scandium recovery from the RM. [162] An interesting study by Rout et al. [163] looked into how hollow fiber-supported liquid ...
Scandium Extraction from Nickel Processing Waste Using …
Scandium is a rare-earth element. Although it is as abundant in the Earth's crust as lead, it is rarely concentrated. Therefore, it is obtained as a byproduct when mining other metals or from scrap processing of end-of-life products.1,2,3,4,5,6 Scandium is usually recovered using hydrometallurgical processes that include leaching, precipitation, …
The biogeochemical cycling of iron, copper, nickel, …
Scandium displayed similar trends to Fe, reinforcing the limited observations of the physicochemical similarities between these two elements in seawater. Overall, this study highlights distinct impacts of photochemical processes, scavenging, and biological effects on marine trace metal cycling in an environment characterized by seasonal …
Study on highly efficient separation of zirconium from scandium …
1. Introduction. Sc is classified as a rare earth element due to its similar properties with lanthanides. The abundance of Sc is not low, ranked the 31th in the earth, but the scarcity of independent Sc minerals and the similar properties of Sc with other elements (e.g., zirconium, thorium, titanium, etc.) makes the extraction and purification …
New insights on scandium separation from scandium …
The main findings of the scandium separation mechanism show that Sc-bearing minerals can effectively decompose and release scandium element after …
Solvent extraction of scandium from chlorination system …
employed to extract Sc3+ from the leaching solution of Fe3+ free. With the. organic phase containing 5 vol% EHP AEH, phase volume ratio O/A of 1:5, at pH 0.3, nearly 99% scandium is extracted ...
Studying the extraction of scandium(III) by macrocyclic
This study aims to optimize the extraction efficiency of Sc(III) by dicyclohexano-18-crown-6 (DC18C6) and kryptofix 2.2.2 (K 2.2.2) macrocyclic compounds as novel extractants using response surface methodology (RSM). Additionally, it was intended to design a method for recovering Sc from an aqueous model solution using …
A Process Flowsheet for the Extraction of Niobium, Titanium …
Scandium is primarily deported in dolomite, with lesser quantities in pyrochlore and biotite. The process flowsheet recovers separate niobium, titanium, and scandium products. Scandium is extracted from whole ore hydrochloric acid leach solutions using solvent extraction and is further refined through a re-leach and …
Scandium Solvent Extraction | SpringerLink
It is important to understand that at low pH values, in strong sulfate solutions, the scandium will be present as a scandium sulfate complex ion. When stripped from the organic phase with chloride-based solutions, the scandium strips as a complex chloride ion. It is therefore important to keep the chloride ion activity high in the strip solution.
Scandium – Leaching and Extraction Chemistry
Scandium (Sc) is the lightest of REE. It has atomic number 21, thus being the neighbor of calcium (Ca). Unlike calcium, which is the fifth most abundant element in the Earth's crust, Scandium is scarce, but still more abundant than lead, tin, silver etc. Scandium has the electron configuration [Ar]3s 2 3d 1.This immediately indicates that …
Scandium Recovery Methods from Mining, …
A study involving P204 as an extractant and tributyl phosphate (TBP) as a modifier to recover scandium from HCl-leaching solutions of magnesium, aluminum, and …
US Patent for Process for separating scandium from complex …
Separating scandium (Sc) from complex salt mixtures is accomplished via a process which includes evaporation, dissolution, solvent extraction, precipitation, and calcination. The preferred process steps provide selective separation of Sc and REE (rare earth elements i.e., lanthanides+yttrium) salts from other salt contaminants and enrichment of ...
A critical review on separation and extraction of …
This review demonstrates many outstanding research achievements have been reported in recent years that solvent extraction technology occupies a dominant …
Experimental Study on Extraction of Scandium from
The scandium concentrate used in the leaching experiment was obtained from the rare earth ore containing scandium in Yunnan Province, the sample used in experiment is leaching liquid containing ...
Scandium Solvent Extraction | Request PDF
Scandium Solvent Extraction. January 2019. DOI: 10.1007/978-3-030-05864-7_174. In book: Light Metals 2019 (pp.1395-1401) Authors: Nigel Jeffrie Ricketts. Altrius Engineering Services. To read the ...
A review on solvent extraction of scandium
Tris (2-ethylhexyl) phosphate was used to separate Sc (III) and Y (III) from salicylate medium. The best extraction condition was studied and the result showed …
Extraction of Scandium from Critical Elements …
Abstract. Scandium is one of the most valuable rare-earth elements, and its extraction is centralized in China. For this reason, the search for new scandium …
Extraction of scandium from red mud by modified activated …
About 95 % of scandium is separated from the complex feedstock prepared from industrial waste bauxite residue, and the selectivity of scandium is more than 200 times higher than that of aluminum. Adsorption isotherm and kinetic studies are performed, and the experimental data are in good agreement with the Langmuir isotherm model …
Recovery of scandium from various sources: A critical …
Highlights. •. A review of scandium extraction by hydrometallurgical route is presented. •. A discussion of factors affecting scandium extraction/recovery towards …
Scandium extraction by neutral organo-phosphorus
Kinetic study of scandium extraction by TVEX from hydrochloric solutions with different acidity shows (Fig. 1 Fig. 2) that 90% of equilibrium Sc extraction is achieved in 120 min both for TVEX–DIOMP and TVEX–TBP.Values of the scandium diffusion coefficient in TVEX grains are given in Table 1.Aqueous phase acidity negligibly …
Extractive Separation of Scandium from Rare Earth …
extractants and their compounds, study of the complex-forming properties of reagents. The goal of this work was to study the extraction patterns and possible separation of …
Separation and Extraction of Scandium from Titanium …
The solvent extraction method for extracting scandium from titanium dioxide waste acid is usually accompanied by co-extraction of titanium. In this paper, the scandium and titanium separation of the Sc(III) and Ti(IV)-loaded organic phase and the recovery of scandium were studied. A new scrubbing agent containing Na3Cit and …
Separation and purification of scandium by solvent …
Separation and purification of scandium by solvent extraction and related technologies: a review - Wang - 2011 - Journal of Chemical Technology & Biotechnology …
(PDF) Scandium extraction from multicomponent systems …
The product of crystallization from sulfuric solution used for treating poor scandium concentrate produced from red mud is a mixture of polymorphs of the composition NH4Sc (SO4)2. Co-precipitated ...
High purity scandium extraction from red mud by novel
Full or partial utilization or recycling of red mud could reduce the harmful effect on the environment. Scandium is the most valuable ingredient of red mud, yet it's extraction is poorly commercialized due to its high cost. The new efficient extraction technologies promise an ensured supply of scandium and a significant drop in cost.
Recovery of scandium from red mud by leaching with titanium white waste
1. Introduction. With the rapid development of science and technology, scandium (Sc) and its compounds have been widely used in various fields such as in new materials, Al Sc alloys, electronics, metal halide lamps, aerospace, transportation industries, catalyst ceramics, and solid oxide fuel cells (Wang et al., 2011).Scandium is a rare …
Recovery of scandium from silicate minerals by high …
Due to the limitation of scandium only existing in a few areas, researchers have been looking for new sources to extract scandium. 8 Scandium is also a rare element with an average abundance of only 0.22 × 10 −4 wt% in the earth's crust, resulting in a complex and pricey metallurgical process. 9 Ores with a scandium content range of …
Development of Scandium-Recovery Process from Titanium …
Since 2015, JX Nippon Mining & Metals has been developing a process for scandium recovery from the residue of a titanium -smelting process. The process consists of the following steps: scandium concentrating by classification or neutralization, selective scandium leaching, impurity removal by neutralization, solvent extraction of scandium …