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separation rare spectroscopy

Separation of Rare Earth Elements American Chemical Society

The story involves the discovery of emission spectroscopy by Gustav Robert Kirchhoff and Robert Wilhelm Bunsen, the development of the periodic table by Dmitri Ivanovich Mendeleev and Lothar Meyer, and the discovery of X-rays by Wilhelm Conrad Roentgen. The American Chemical Society designated the separation of rare earth elements by

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Separation of Rare Earths from the Transition Metals Using

An ionic-liquid-based aqueous two-phase system (iL-ATPS) consisting of an ionic liquid, tributylmethylammonium nitrate (N4441NO3), and NaNO3 aqueous solutions was developed for the extraction and separation of rare-earth ions, for example Nd(III), from transition-metal ions. The excellent selectivity of a green nonfluorinated ionic liquid and the low-viscosity feature of an aqueous two-phase

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Recent Advances in the Separation of Rare Earth Elements

1 Introduction The Need of New Sorbents for Rare Earth Separation. The rare earth elements (REEs), as defined by IUPAC, are a group of 17 elements including 15 lanthanides (Ln), scandium (Sc) and yttrium (Y). (TGA) and solid‐state NMR spectroscopy, as no significant change in the integrity of the organic units was observed.

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Recovery and Separation of Rare Earth Elements Using

Dec 09, 2014· Recycling rare earth elements (REEs) used in advanced materials such as Nd magnets is important for the efficient use of REE resources when the supply of several REEs is limited. In this work, the feasibility of using salmon milt for REE recovery and separation was examined, along with the identification of the binding site of REEs in salmon milt.

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Separation of rare gases and chiral molecules by selective

Abstract The separation of molecules with similar size and shape is an important technological challenge. For example, rare gases can pose either an economic opportunity or an environmental hazard and there is a need to separate these spherical molecules selectively at low concentrations in air.

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US3615173A Separation of rare earth elements by ion

Discuss; 229910052761 rare earth metals Inorganic materials 0.000 title abstract description 24; 238000000926 separation method Methods 0.000 title description 7; 238000005342 ion exchange Methods 0.000 title description 6; 150000001875 compounds Chemical class 0.000 claims abstract description 4; 239000011347 resins Substances 0.000 claims description 32; 229920005989 resins

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Selective extraction and column separation for 16 kinds of

The selective extraction and column separation rear earth elements (REEs) were investigated in the present work. Herein, the functional ligand of N, N-dioctyldiglycolic acid (DODGA) was synthesized and chemically grafted on the silica gel (SG) particles to give the novel material [email protected] The obtained [email protected] was fully characterized by NMR, BET (Brunauer-Emmett-Teller) N 2

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Recovery and separation of rare Earth elements using

Dec 09, 2014· Recycling rare earth elements (REEs) used in advanced materials such as Nd magnets is important for the efficient use of REE resources when the supply of several REEs is limited. In this work, the feasibility of using salmon milt for REE recovery and separation was examined, along with the identification of the binding site of REEs in salmon milt.

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Electrostatic Separation an overview ScienceDirect Topics

Errol G. Kelly, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. III.G.2 Theory of Electrostatic Separation. There are three distinct stages in electrostatic separation processes: particle charging, separation at the grounded surface, and separation caused by the trajectory of the particles. Particle charging can occur by three possible mechanisms: contacting of

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4: Spectroscopy, Separations, and Purifications Flashcards

A separation technique used to separate liquids with different boiling points. The mixture is heated slowly, and as the liquid with the lower boiling point changes to its gaseous form, it passes through a condenser, where it cools back into its liquid form.

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Rationally designed rare earth separation by selective

The process of fractional separation of rare earth by oxalate precipitation is also well-known, 12–14 but the efficiency of that process does not offer significant advantages over other methods like double sulphate or chromates salts precipitation. 15 The separation of rare earth oxalates in acidic 12 and basic 13 media is also established.

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Separation and preconcentration of the rare-earth elements

The abundance of rare-earth elements (REE) and yttrium in geological materials is generally low, and most samples contain elements that interfere in the determination of the REE and Y, so a separation and/or preconcentration step is often necessary. This is often achieved by ion-exchange chromatography with either nitric or hydrochloric acid.

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Accomplishing simple, solubility-based separations of rare

Dec 27, 2016· Rare earth metals, La–Lu, Sc, and Y, are essential components of electronic materials and permanent magnets in diverse technologies. But, their mining and separations chemistry are unsustainable and plagued with supply problems. Recycling of consumer materials containing rare earths is a promising new source of these critical materials but similarly requires efficient separations.

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Separation of rare gases and chiral molecules by selective

Abstract The separation of molecules with similar size and shape is an important technological challenge. For example, rare gases can pose either an economic opportunity or an environmental hazard and there is a need to separate these spherical molecules selectively at low concentrations in air.

More

US3615173A Separation of rare earth elements by ion

Discuss; 229910052761 rare earth metals Inorganic materials 0.000 title abstract description 24; 238000000926 separation method Methods 0.000 title description 7; 238000005342 ion exchange Methods 0.000 title description 6; 150000001875 compounds Chemical class 0.000 claims abstract description 4; 239000011347 resins Substances 0.000 claims description 32; 229920005989 resins

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Detailed study on simultaneous separation of rare earth

Dec 06, 2020· Separation of all rare earth elements (REEs) by capillary zone electrophoresis was investigated in a system of alpha-hydroxyisobutyric acid (HIBA)

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OSA Laser isotope separation of rare earth elements

The experimental results on the laser isotope separation of the neodimium, samarium, europium, gadolinium dysprosium and erbium by the selective two-step photoionization are given. The rare earth elements have been chosen for the investigation because they constitute a good series of the very similar but different atoms that are heavy enough and allow experiments to be carried out that are

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GB2560871A Separation of rare earth matals Google Patents

A method for extracting a rare earth metal from a mixture of one or more rare earth metals comprises contacting an acidic solution of the rare earth metal with a composition which comprises an ionic liquid to form an aqueous phase and a non-aqueous phase into which the rare earth metal has been selectively extracted; said ionic liquid has the formula: [Cat+][X-], wherein [Cat+] is [Y+]L1N(L2

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Europium and samarium separation using ion exchange

Journal of Electron Spectroscopy and Related Phenomena, Vol. 74, Issue 1 DOI: 10.1016/0368-2048(95)02349-6 The recovery of rare earth oxides from a phosphoric acid by-product.

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Chapter 16 Infrared Spectroscopy Chemistry

Nernst glower (rare earth oxides. 2. Glowbar (SiC rod) Detectors (must be stable, have fast cause charge separation internally) Instruments must have good focusing and collection optics!! Principles of FTIR Spectroscopy In FTIR analyses, Infrared light from the light source passes through a Michelson

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Solid-phase extraction and separation of heavy rare earths

A solid-phase extraction resin SIRs-P227/XAD-7HP was prepared by impregnating extractant P227 onto macroporous resin XAD-7HP beads. SIRs-P227/XAD-7HP beads were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS). The adsorption kinetics, particle size effect, adsorption isotherm

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Atomic Spectroscopy · Atomic Spectroscopy Press Limited

Journal Oveview: Atomic Spectroscopy (ISSN: 0195-5373/e-ISSN: 2708-521X, 2019 SCI IF=1.292) is a peer-reviewed international journal started in 1962 by Dr. Walter Slavin. Advancing the analytical

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Separation and preconcentration combined with glow

A method of glow discharge atomic emission spectroscopy (GD-AES) is described for the determination of rare earth elements (REEs) after separation and preconcentration by micro-column packed with immobilized 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) on microcrystalline naphthalene. The graphite electrode with solution residue on its surface was used as a cathode.

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The group separation of the rare-earth elements and

Demand is increasing for the determination of the rare-earth elements (REE) and yttrium in geologic materials. Due to their low natural abundance in many materials and the interferences that occur in many methods of determination, a separation procedure utilizing gradient strong-acid cation-exchange chromatography is often used to preconcentrate and isolate these elements from the host-rock

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