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Ion exchange method for the purification of scandium

Ion exchange method for the recovery of scandium: 1989-03-28: Rourke et al. 423/21.5: 4808384: Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material: 1989-02-28: Vanderpool et al. 423/21.5: 4765909: Ion exchange method for separation of scandium and thorium: 1988-08-23: Rourke et al. 423/21.5: 4718996

US5019362A Ion exchange method for the purification of

A process is disclosed for purifying scandium from an acid solution containing scandium and various impurities. The process involves mixing the acid solution with a chelating resin in the hydrogen form to from a slurry and packing the slurry in a short ion exchange column. The ion exchange column is rinsed with a mineral acid and the scandium is removed by passing diglycolic acid through the

US4965053A Ion exchange purification of scandium

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 order to maintain the scandium in the column while

Ion exchange method for the recovery of scandium GTE

The process is an ion-exchange method, an attractive unit operation from an engineering standpoint since a bank of two or more ion-exchange columns can process a feed stream. Furthermore, the selective nature of the proposed procedure minimizes the addition of chemical reagents to the solution before the ion-exchange step.

Ion exchange purification of scandium (Patent) DOE Patents

1990-10-23  A reactive ion exchange method for separation and recovery of values of uranium, neptunium, plutonium, or americium from substantially neutral aqueous systems of said metals comprises contacting said system with an effective amount of a basic anion exchange resin of copolymerized divinyl-benzene and styrene having quarternary ammonium groups

US4816233A Ion exchange method for the recovery of

A method of recovering quantitatively trace amounts of scandium from aqueous solutions containing large amounts of other metals consists of reducing any manganese and iron in the solution to the divalent states of manganese and iron. The solution is then adjusted to a pH from about 1.9 to about 2.1 and passed through a column of the ion exchange resin in the hydrogen form having an

Ion exchange purification of scandium Iowa State

Ion exchange method for the recovery of scandium: 1989-03-28: Rourke et al. 210/688: 4718996: Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material: 1988-01-12: Vanderpool: 751/1BE: 4718995: Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material: 1988-01-12: Vanderpool et al. 204

Purifying Scandium Chloride Solution by Ion Exchange

Abstract: 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. The results showed that when the pH value is 2 and contact time is 3 hours, the resin has great advantage on adsorbing Sc 3+ , Al 3 + and Fe 3+ , whereas the adsorption

Selective ion-exchange separation of scandium(III) over

2019-5-15  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,,,,,, . Ion-exchange chromatography has the advantage of high preconcentration factors,,,.

Ion-Exchange Methods of Scandium Recovery from the

2019-7-31  Abstract—The extraction of scandium from a nitric acid solution after pressure leaching of the hydrate cake that forms upon processing the ore of the Tomtor deposit is studied. The main technological laws of scandium sorption and extraction using various absorbers under static and dynamic conditions are investigated. To extract scandium, we recommend using phosphorus-containing cation

Purifying Scandium Chloride Solution by Ion Exchange

Abstract: 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. The results showed that when the pH value is 2 and contact time is 3 hours, the resin has great advantage on adsorbing Sc 3+ , Al 3 + and Fe 3+ , whereas the adsorption

Selective ion-exchange separation of scandium(III) over

2019-5-15  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,,,,,, . Ion-exchange chromatography has the advantage of high preconcentration factors,,,.

Selective ion-exchange separation of scandium(III) over

This method holds great potential for the recovery of Sc(III) from bauxite residue. efficient and cost-effective process to achieve the separation and purification of scandium. Insoluble salts of tetravalent metal ions are inorganic, acid-resistant ion exchangers with well-established preparation procedures, but their potential use in rare

Ion-Exchange Methods of Scandium Recovery from the

2019-7-31  Abstract—The extraction of scandium from a nitric acid solution after pressure leaching of the hydrate cake that forms upon processing the ore of the Tomtor deposit is studied. The main technological laws of scandium sorption and extraction using various absorbers under static and dynamic conditions are investigated. To extract scandium, we recommend using phosphorus-containing cation

Removal of impurities from scandium solutions by ion

2018-12-14  purification process is very complicated. There are three ways to extract scandium from the solution which contains a number of impurities. They are precipitation, solvent extraction and ion exchange. Precipitation can only separate scandium with some specific

Removal of impurities from scandium solutions by ion

A process of removing impurities, such as Fe, Zr, Ti, Al, Si, from scandium solution by ion exchange was proposed. Various resins’ selectivity was studied in scandium chloride solution. The results indicated that D851 resin had high selectivity of Sc at low acidity, and high selectivity of Zr at high acidity; D370 resin had high selectivity of Fe and Si in high acidity.

Ion-exchange chromatography method for the purification

The goal of this study was to provide practical strategies for purifying genomic DNA fraction from Mycobacterium bovis Bacillus Calmette-Guérin (BCG-DNA) by ion-exchange chromatography. A multistep process was developed to purify BCG-DNA. The process consisted of sonication, heating, trypsin digesti

Ion exchange method for separation of scandium and

A method for a quantitative separation of scandium from thorium comprises adsorption of both metals on a cation exchange resin followed by selective elution of scandium with an acidic solution of a chelating agent followed by the elution of thorium by a six normal hydrochloric acid solution.

Production and purification of Scandium-47: A potential

2016-12-1  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 added to distilled water and the resulting solution was

Ion exchange method for DNA purification KRISTYANNE

A method and materials are described for purification of DNA using ion exchange resins. This ion exchange method provides the means to remove salts and low molecular weight contaminants from DNA in solution without binding or removing the DNA of interest.

Selective ion-exchange separation of scandium(III) over

This method holds great potential for the recovery of Sc(III) from bauxite residue. efficient and cost-effective process to achieve the separation and purification of scandium. Insoluble salts of tetravalent metal ions are inorganic, acid-resistant ion exchangers with well-established preparation procedures, but their potential use in rare

Radiochemical purification of no-carrier-added scandium

A procedure, adaptable to large-scale remote operation, was developed to purify no-carrier-added (NCA) 47Sc from irradiated Ti targets. Methods based on extraction chromatography and cation-exchange chromatography were compared. Results of this comparison

Separation and purification of scandium by solvent

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. View

Selective recovery of vanadium and scandium by ion

Selective recovery of vanadium and scandium by ion exchange with D201 and solvent extraction using P507 from hydrochloric acid leaching solution of red mud Chemosphere . 2017 May;175:365-372. doi: 10.1016/j.chemosphere.2017.02.083.

Removal of impurities from scandium solutions by ion

A process of removing impurities, such as Fe, Zr, Ti, Al, Si, from scandium solution by ion exchange was proposed. Various resins’ selectivity was studied in scandium chloride solution. The

Separation and purification of scandium by solvent

2011-10-1  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. Their disadvantages originate from the high stripping acidity required for the former and the poor selectivity for the latter. Carboxylic

Production and purification of Scandium-47: A potential

2016-12-1  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 added to distilled water and the resulting solution was

Ion-exchange chromatography method for the purification

The goal of this study was to provide practical strategies for purifying genomic DNA fraction from Mycobacterium bovis Bacillus Calmette-Guérin (BCG-DNA) by ion-exchange chromatography. A multistep process was developed to purify BCG-DNA. The process consisted of sonication, heating, trypsin digesti

Ion Exchange Chromatographic Methods for Purification

2021-9-4  Ion Exchange Chromatography has been a critical unit operation for manufacturing of therapeutic antibodies. Cation and anion exchange chromatography are used extensively to remove process-related as well as product-related impurities to obtain the final product. In this chapter, we describe the methods for separating and purifying charge

US20020042506A1 Ion exchange method for DNA

A method and materials are described for purification of DNA using ion exchange resins. This ion exchange method provides the means to remove salts and low molecular weight contaminants from DNA in solution without binding or removing the DNA of interest.