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Separation of Rare Earths from Other Metal Ions by Anion

 · Anion exchange separation of thorium from the rare earth elements in an acetone-nitric acid medium. Journal of Inorganic and Nuclear Chemistry 1966 28 (1) . DOI 10.1016/(66). F.W.E. Strelow.

The separation of the rare earths by ion exchange

 · the separation of Ce snd Y in niacro amounts 53 Table 2. The per cent Y eluted before cerium bre kthrough 54 Table 3. Separation of 10 rag Y and 250 mg Ce by elution with 5 per cent citrate column length 160 cm flov rate 5 ctr./min pH 2 77. 55 Table 4. Separation between the trro band maxima of Ce and Y in a 600 cm. column 59 Table 5.

Separation of Radionuclides from a Rare Earth-Containing

The demand for rare earth elements (REEs) has increased rapidly due to their diverse applications in many industries 1 2 3 4 5 .Although the global reserves for rare earths were estimated as 130 million metric tons finding highly concentrated rare earth deposits for economically viable extraction processes remain a challenge 7 8 .Hence to meet the demand extracting rare earths from

APPARATUS AND METHOD FOR RECOVERING RARE EARTH

A rare earth metal recovery apparatus and a rare earth metal recovery method each of which can recover a rare earth metal from a rare earth magnet and enabled the extraction of the rare earth metal from the rare earth magnet with molten magnesium the separation between magnesium having the extracted rare earth metal contained therein and a residual component i.e. a Fe-B alloy of the rare

Highly efficient separation of rare earths from nickel and

The ionic liquid rare earth ratios at maximal loading of the ionic liquid were determined by the extraction of the rare earths from aqueous solutions containing 37.0 g L −1 lanthanum and 163.0 g L −1 nickel or 104.8 g L −1 samarium and 202.5 g L −1 cobalt respectively and

TECHNICAL FEASIBILITY OF SELECTIVELY SEPARATING

 · selected rare earth halides (bromides and chlorides) using a volatilization and condensation technique. Initially optimum chloridizing and bromidizing roast parameters were secured in studies performed on reagent grade rare earth oxide samples and subsequently confirmed in tests performed on mineral ore and concentrate samples.

Magnetic separation and extraction of rare metals using

Earth rocks (the molar concentration of iron about 1 10 mol/L) were recovered on the collecting plate and the magnetic separation of substances by Fe concentration was also realized. That is the team confirmed that separation and extraction of most substances in nature were possible in principle by using only small-sized permanent magnets.

Rare-Earth Separation Using BacteriaHarvard University

 · Rare-Earth Separation Using Bacteria William D. Bonificio and David R. Clarke Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University 29 Oxford Street Cambridge Massachusetts 02138 United States S Supporting Information ABSTRACT The rare-earth elements are critical to many green

RARE EARTH ELEMENTS

 · As part of its RD D technology portfolio NETL has initiated the Rare Earth Elements from Coal and Coal By-Products RD D Program which focuses on developing element (REE) separation and recovery rare earth technologies addressing the current global REE separations market and process economics and demonstrating

Rare-earth separation using bacteriaPendidikan Kimia

 · 2 18 ABSTRACT 19 20 The rare-earth elements are critical to many green energy technologies but are difficult to 21 separate from one another because of their chemical similarity. We demonstrate an alternative 22 biogenic method based on lanthanide adsorption to the bacteria Roseobacter sp. AzwK-3b 23 immobilized on an assay filter followed by subsequent desorption as a

Separation of Particles of Rare Earth Oxides by

A major challenge in chemical engineering is the separation and purification of materials especially of rare earth compounds. It has been reported that a dielectrophoretic (DEP) apparatus can be used for separating rare earth oxides. The DEP capture of REOs on screen electrode was observed with microscope. The concentration of ROEs was determined using a nephelometer and ICP-OES before

Separation of Rare Earth Elements (REE) by Ion Interaction

 · The possibility of rare earth elements (REE) separation by ion interaction chromatography (IIC) employing their complexes with diglycolic acid (ODA) in anion exchange mode has been studied theoretically and experimentally. Calculations assuming that only trivalent complex is significantly uptaken by the stationary phase indicated that at at pH 4–6 the retention in the lanthanide series

(PDF) Separation and Solidification of Rare Earth Nuclides

The separated was solidified into a homogeneous and fine-grained form at using LIP (Lead Iron Phosphate) as a solidification agent. The final waste volume was reduced below about 10 through the

Quantitative separation of small amounts of rare earths

 · rare-earth impurities in the yttrium carrier. A simultaneous separation from the rare earths of the common element impurities present in the thorium has been accomplished. A high degree of compensation for procedural errors is achieved by the use of a pure rare earth as both the carrier in the separation

US Patent Application for SEPARATION OF RECYCLED

 · Extraction of rare earths from end-of-use machinery having rare earth magnets provides a closed-loop process towards recycling rare earths from comingled devices having embedded magnets such as motors generators and disk drives. A low temperature process selectively leaches the magnet material from mixed scrap containing shredded fragments of the machinery which includes other

Technique for Enhanced Rare Earth Separation Science

 · A process is demonstrated for the efficient separation of rare earth elements using a combination of selective reduction and vacuum distillation of halides. The large differences in the redox

CRITICAL MINERALS SUSTAINABILITY PROGRAM

 · and demonstration (RD D) program that has focused on the extraction separation recovery and purification of rare earth elements (REE) and critical minerals (CM) from coal-based resources which include run-of-mine coal coal refuse (mineral

Chromatographic Techniques for Rare Earth Elements

 · The present capability of rare earth element (REE) analysis has been achieved by the development of two instrumental techniques. The efficiency of spectroscopic methods was extraordinarily improved for the detection and determination of REE traces in various materials. On the other hand the determination of REEs very often depends on the preconcentration and separation of REEs and

CMI Technologies with Reuse and Recycling Ames

 · Separation of Rare Earth Elements Recovered from Scrap Permanent Magnets This invention describes a method for economic dismantlement of electric machines and other apparatus to recover critical rare earth elements and other value streams such as copper printed circuit boards aluminum steels wire etc. This process ingests entire

Separation/Preconcentration Techniques for Rare Earth

The main aim of this chapter exactly characterizes the contribution. The analytical chemistry of the rare earth elements (REEs) very often is highly complicated and the determination of a specific element is impossible without a sample pre-concentration. Sample preparation can be carried out either by separation of the REEs from the matrix or by concentrating the REEs. The separation of REEs

Rare-earth recycling using a functionalized ionic liquid

 · Rare-earth recycling using a functionalized ionic liquid for the selective dissolution and revalorization of Y 2 O 3 Eu 3 from lamp phosphor waste . D. Dupont and K. Binnemans Green Chem. 2015 17 856 DOI 10.1039/C4GC02107J This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

Quantitative separation of small amounts of rare earths

 · rare-earth impurities in the yttrium carrier. A simultaneous separation from the rare earths of the common element impurities present in the thorium has been accomplished. A high degree of compensation for procedural errors is achieved by the use of a pure rare earth as both the carrier in the separation

RARE EARTH ELEMENTS

 · As part of its RD D technology portfolio NETL has initiated the Rare Earth Elements from Coal and Coal By-Products RD D Program which focuses on developing element (REE) separation and recovery rare earth technologies addressing the current global REE separations market and process economics and demonstrating

Counter current extraction separation of rare earth traces

The discontinuous counter current extraction separation of radioactive traces of rare earth elements from each other was successfully performed by using a 96 stage automatic microscale counter current apparatus. Choice of the optimum composition of the aqueous phase (var. HNO3 conc.) and organic phase di-(2-ethylhexyl) phosphoric acid (HDEHP) in toluene was made on the basis of the results

Separation of individual rare earths by liquid-liquid

 · 9. Separation factor as a function of rare earth concentration . 20 10. Effect of nitric acid on rare earth equilibrium 21 11. Equilibrium diagram for rare earth nitrates-tributyl phosphate-water system 22 12. Operating lines and equilibrium line for the rare earth nitrates-tributyl phosphate-water system 25

TECHNICAL FEASIBILITY OF SELECTIVELY SEPARATING

 · selected rare earth halides (bromides and chlorides) using a volatilization and condensation technique. Initially optimum chloridizing and bromidizing roast parameters were secured in studies performed on reagent grade rare earth oxide samples and subsequently confirmed in tests performed on mineral ore and concentrate samples.

Process Shin-Etsu Rare Earth

Shin-Etsu Chemical started researching rare earths in 1961 and soon after we started using the solvent extraction method ( 1) for separation and purification of rare earths. Color televisions were widely used in the 1960s and rare earths were used for these televisions.

CMI Technologies with Reuse and Recycling Ames Laboratory

 · Separation of Rare Earth Elements Recovered from Scrap Permanent Magnets This invention describes a method for economic dismantlement of electric machines and other apparatus to recover critical rare earth elements and other value streams such as copper printed circuit boards aluminum steels wire etc. This process ingests entire

(PDF) Technique for Enhanced Rare Earth Separation

 · A process is demonstrated for the efficient separation of rare earth elements using a combination of selective reduction and vacuum distillation of halides. The large differences in the redox

SEPARATION OF AMERICIUM FROM RARE EARTHS

 · SEPARATION OF AMERICIUM FROM RARE EARTHS 1. SCOPE 1.1. This is a method for separation of americium (and curium) from rare earths prior to alpha spectrometry source preparation. 1.2. This method does not address all aspects of safety quality control calibration or instrument set-up. However enough detail is given

An overview on membrane strategies for rare earths

 · Publication numbers on each rare earth element by membrane separation during the past thirty years (based on data mainly obtained and analyzed from Web of Science until Dec. 29th 2017). REA3 are polymers in aggregation state which have bad miscibility in organic solvents. Such phenomenon is not common in light REEs.

Technique for Enhanced Rare Earth Separation

 · other rare earths (e.g. Sc La Ce Pr) (9). The vapor pressure of rare earth dihalides is lower than that of the corresponding trihalides by one to two orders of magnitude (10–12). Thus preferential reduction of a component in a mixture of rare earth trichlorides can markedly affect its volatility and provide a method for its separation.

Extraction Separation Purification of Rare Earth Elements

 · Preliminary separatory funnel tests using 0.2 M amine in an immiscible organic liquid and an equal volume of 0.2 M rare-earth sulfate solution (pH 1) showed that the primary amines gave the highest extraction of rare-earth elements. A study of separation factors gave results that varied from 1.2 for Nd-Pr pairs to 12 for Ce (III)-Yb (III) pairs.