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separation rare selective

separation rare selective

Separation of rare gases and chiral molecules by selective

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. Likewise, ch

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Size-Selective Separation of Rare Earth Elements Using

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials ACS Appl Mater Interfaces. 2019 Jul 3;11(26):23681-23691. doi: 10.1021/acsami.9b04183. Epub 2019 Jun 18. Authors Yimu Hu 1

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Selective separation of rare earth ions from aqueous

Nov 01, 2017 Separation of rare earth ions (RE 3+) from aqueous solution is a tricky problem due to their physico-chemical similarities of properties.In this study, we investigate the influence of the functionalized ligands on the adsorption efficiency and selective adsorption of La 3+, Nd 3+, Gd 3+ and Y 3+ from aqueous solution using Magnetite (Fe 3 O 4) nanoparticles (NPs) functionalized with citric

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Selective separation of rare earths from spent Nd-Fe-B

The research presents an effective approach to achieve the selective separation of rare earth elements (REEs) from waste Nd-Fe-B magnets. Investigations show that the use of a two-stage roasting process can significantly reduce the amount of ammonium sulfate required and improve the separation efficiencies of REEs.

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Selective separation of rare-earth metal ions from aqueous

Sep 15, 2019 The prospects of the electroflotation method for selective separation of rare-earth metal ions (Ce 4+ and La 3+) from aqueous solutions in a flow-type plant are described.The separation process proceeds most effectively in sodium sulfate and sodium nitrate solutions at pH value of 5.0.

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Rationally designed rare earth separation by selective

A simple, environmentally benign, and efficientchemical separation of rare earth oxalates (CSEREOX) within two rare earth element (REE) subgroups has been developed. The protocol allows for selective solubilization of water-insoluble oxalates of rare earth elements, and results in efficient REE extraction even at low initial

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Selective recovery and separation of rare earth elements

Jan 01, 2021 Adsorption is a feasible alternative for the recovery and separation of rare earth metals due to its environmentally-friendly characteristics, low cost, tuneable selectivity towards REEs, and applicability at low initial concentrations . In recent years, porous adsorbent materials, such as zeolites, silica gel, activated carbon, ion-exchange

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Rare earth separations by selective borate crystallization

Mar 14, 2017 In the application perspective, since the scheme of selective borate crystallization has been demonstrated to be effective for lanthanide separation in our study, the optimizations on the

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Separation of rare gases and chiral molecules by selective

Jul 20, 2014 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

get price

Size-Selective Separation of Rare Earth Elements Using

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials ACS Appl Mater Interfaces. 2019 Jul 3;11(26):23681-23691. doi: 10.1021/acsami.9b04183. Epub 2019 Jun 18. Authors Yimu Hu 1

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Selective Crystallization of Rare-Earth Ions into Cationic

For rare-earth separation, selective crystallization into metal-organic frameworks (MOFs) offers new opportunities. Especially important is the development of MOF platforms with high selectivity toward target ions. Here we report a MOF platform (CPM-66) with low-coordination-number environment for r

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Separation of rare gases and chiral molecules by selective

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. Likewise, chiral molecules are important building blocks for pharmaceuticals, but chiral enantiomers, by

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US6093376A Selective separation of rare earth elements

A method is disclosed to separate the heavy rare earth elements Lu through Sm plus Y by an ion-exchange process called selective elution. Mixed rare earths are saturated onto a loading column containing sulfonic resin. Iminodiacetic resin in a separation column is conditioned into the hydrogen and ammonium form before it is saturated with rare earth retaining ion.

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Selective separation of bovine hemoglobin using magnetic

Selective separation of heme proteins and peptides from complicated biological samples before comprehensive identification and characterization of intact biomolecules which are low stoichiometry is indispensable for ongoing proteomics. Here, three magnetic mesoporous rare-earth silicate (rare-earth

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Separation and recovery of rare earths by in situ

Jun 01, 2020 Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts Author links open overlay panel Yujian Zhou a Stephen Schulz a Leonard F. Lindoy b Hao Du c Shili Zheng c Marco Wenzel a Jan J. Weigand a

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Selective Extraction of Rare Earth Elements from Permanent

Jun 24, 2015 The yttrium-- rare earth concentrates were obtained from Fergusonite ore, Gadolinite ore, and a by-product from an ion-exchange resin separation process. In each case the mixture in terms of oxide was composed of from 50 to 60% yttrium and 5 to 15% heavy rare earths with the light rare earth fraction constituting the remaining material.

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Selective separation of rare earth elements by ion

Apr 17, 1998 EDTA quantitatively strips the light rare earth from sulfonic resin. This difference in chemical affinity between iminodiacetic resin and EDTA for the heavy and light rare-earth elements gives selective elution two separation equilibriums and may account for the excellent segregation achieved by this resin-eluent combination.

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Unusual seeding mechanism for enhanced performance in

Mar 07, 2017 Due to the increasing demand of Rare Earth Elements (REE or RE), new and more efficient techniques for their extraction are necessary, suitable for

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Rationally designed rare earth separation by selective

A simple, environmentally benign, and efficient chemical separation of rare earth oxalates (CSEREOX) within two rare earth element (REE) subgroups has been developed. The protocol allows for selective solubilization of water-insoluble oxalates of rare earth elements, and results in efficient REE ext

get price

Size-Selective Separation of Rare Earth Elements Using

Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials ACS Appl Mater Interfaces. 2019 Jul 3;11(26):23681-23691. doi: 10.1021/acsami.9b04183. Epub 2019 Jun 18. Authors Yimu Hu 1

get price

Separation of rare gases and chiral molecules by selective

Oct 31, 2014 OSTI.GOV Journal Article: Separation of rare gases and chiral molecules by selective binding in porous organic cages

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Rationally designed rare earth separation by selective

A simple, environmentally benign, and efficient chemical separation of rare earth oxalates (CSEREOX) within two rare earth element (REE) subgroups has been developed. The protocol allows for selective solubilization of water-insoluble oxalates of rare earth elements, and results in efficient REE extraction e

get price

"Rationally designed rare earth separation by selective

A simple, environmentally benign, and efficient chemical separation of rare earth oxalates (CSEREOX) within two rare earth element (REE) subgroups has been developed. The protocol allows for selective solubilization of water-insoluble oxalates of rare earth elements, and results in efficient REE extraction even at low initial concentrations (<5%) from processed magnet wastes.

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Selective Separation of Light and Heavy Rare Earth

Different separation techniques such as solvent extraction, ion exchange, and precipitation are often used for recovery of rare earth elements (REEs) from pregnant leach solutions obtained from acid leaching. Solvent extraction is generally accepted as the most appropriate commercial technology for separating REEs due to the need to be able to handle larger volumes of diluted pregnant solutions.

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Selective Extraction of Rare Earth Elements from Permanent

Jun 24, 2015 The yttrium-- rare earth concentrates were obtained from Fergusonite ore, Gadolinite ore, and a by-product from an ion-exchange resin separation process. In each case the mixture in terms of oxide was composed of from 50 to 60% yttrium and 5 to 15% heavy rare earths with the light rare earth fraction constituting the remaining material.

get price

Selective separation of rare earth elements by ion

Apr 17, 1998 EDTA quantitatively strips the light rare earth from sulfonic resin. This difference in chemical affinity between iminodiacetic resin and EDTA for the heavy and light rare-earth elements gives selective elution two separation equilibriums and may account for the excellent segregation achieved by this resin-eluent combination.

get price

Technique for Enhanced Rare Earth Separation Science

Sep 29, 2000 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 chemistry of the rare earth elements and in the vapor pressures of rare earth di- and trihalides are exploited for separation. Experimental proof of concept is provided for the binary systems

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Extraction and separation of heavy rare earth elements: A

1 天前 Rare earth elements (REEs) include the 15 lanthanides from lanthanum (La) to lutetium (Lu) with atomic numbers of 57–71, accompanied by chemically similar yttrium (Y) and scandium (Sc),.Among the 17 elements, Sc and other elements have no close symbiotic relationship in natural minerals, while promethium (Pr) is the product of natural nuclear fission in uranium ore.

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Unusual seeding mechanism for enhanced performance in

Mar 07, 2017 Due to the increasing demand of Rare Earth Elements (REE or RE), new and more efficient techniques for their extraction are necessary, suitable for

get price