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2016-6-11 The elutions of rare earths from the column were tried with increasing normality of HCl from 0.15 to 6 N acids. The eluted fractions of 2 ml in each tube were analysed by γ-ray spectrometric technique. A flow chart of the rare earths separation procedure and the γ-ray spectrometric analysis has been shown in Fig. 1.
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2011-3-9 The weathered crust elution-deposited rare earth ores that exist only and are discovered in China (Chi and Tian, 2008), are the main resources of mid-heavy rare earth in the world (Kingsnorth and Harries-Rees, 1993, Yasuo and Masaharu, 2006), The rare earth in the ore mainly exists with the ion phase adsorbed on clay minerals (Ruan et al., 2005), which can be leached by electrolyte solution
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2020-3-24 The rare-earth elements are concentrated by eluting the sample solution through a chromatographic column filled with Dowex 50W-X8,200-400 mesh ion- exchange resin.
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2021-5-1 Rare earth elements (REE) consist of lanthanides, scandium and yttrium. These precious metals are essential elements for modern technology. Global demand has been predicted to increase considerably in the foreseeable future (Goodenough et al., 2018). This growing demand will likely pose challenges for a REE supply chain dominated by China, which produces approximately 90% of REE
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2020-10-13 macro quantities from rare earth mixtures. The method consists of eluting a band of mixed rare earths, adsorbed on a cation-exchange resin, through a second cation-exchange resin bed in the copper II or iron III stateo Copper was found to be far superior to iron. The eluant consists of an ammonia-buffered solution of EDTA
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2020-10-13 quantities of the rare earths and actinides. Freiling and Bunney (10) have reported optimum conditions for rare-earth separations with ammonium lactate as the eluting agent. Cunninghame et al. (11) have also reported separations of the rare earths with lactate solutions. Stewart (12) reported separations of rare-earth tracers with an ammonia-buffered
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2018-3-7 A solution of mixed REE (i.e., mixed-rare-earth band) is saturated on the sulfonic resin in another column called the loading column. An eluent (i.e., EDTA) with a greater chemical attraction for the retaining ion than any REE in the mix band is
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2020-5-6 When separation of yttrium from dysprosium is considered sufficient, rare earth-EDTA complex is eluted off the leading column to tanks where it is precipitated with oxalic acid, filtered, dryed, and calcined. We have produced ton quantities of the pure heavy rare earth
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Rare earth elements (REE) are present at low concentrations (hundreds of ppm) in phosphoric acid solutions produced by the leaching of phosphate ores by sulfuric acid. The strongly acidic and complexing nature of this medium, as well as the presence of metallic impurities (including iron and uranium), require the development of a particularly cost effective process for the selective recovery of REE.
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Boosting often overlooked long wavelength emissions of rare-earth nanoparticles for NIR-II fluorescence imaging of orthotopic glioblastoma. Biomaterials. 2019 Oct;219:119364.
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1973-5-16 Separations of several adjacent rare earth pairs were investigated in order to compare the effectiveness of two eluting agents: α-hydroxyisobutyric acid (αHIBA) and α-hydroxy-α-methylbutyric acid (αHαMBA). The latter was found to be superior
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2021-2-11 Recovery of rare earth elements from phosphogypsum waste in resin-in-leach process by eluting with biodegradable complexing Hydrometallurgy ( IF 3.338) Pub Date : 2021-02-02, DOI: 10.1016 Santeri Kurkinen, Sami Virolainen, Tuomo Sainio
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2016-6-11 Individual separation of rare earth isotopes from lanthanum to lutetium has been carried out using reverse phase partition chromatography and analyzed by γ-ray spectrometric technique. HDEHP from FLUKA and BDH on inert support celite has been used as extracting agent, whereas hydrochloric acid of different molarities was used as eluting agent.
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2020-10-13 separation of rare earths in macro-quantities ; however, both have been used effectively for the separation of tracer quantities of the rare earths and actinides. Freiling and Bunney (10) have reported optimum conditions for rare-earth separations with ammonium lactate as the eluting agent.
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2020-10-13 eluting a band of mixed rare earths, adsorbed on a cation-exchange resin, through a second cation-exchange resin bed in the copper II or iron III stateo Copper was found to be far superior to iron. ... rare earth like 5dl 6s2 outermost electronic configuration and consequently is included in the rare earth family by most authors.
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Authors: Sisson, D H; Mode, V A Publication Date: Thu Mar 21 00:00:00 EDT 1974 Research Org.: California Univ., Livermore (USA). Lawrence Livermore Lab. OSTI Identifier:
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Rare earth elements (REE) are present at low concentrations (hundreds of ppm) in phosphoric acid solutions produced by the leaching of phosphate ores by sulfuric acid. The strongly acidic and complexing nature of this medium, as well as the presence of metallic impurities (including iron and uranium), require the development of a particularly cost effective process for the selective recovery ...
Read More2018-3-7 Potential increases in overall demand and purity requirements of rare-earth elements (REE) prompted the U.S. Bureau of Mines (USBM) to investigate new technology for separating these elements. REE, as defined by the USBM, include a
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2014-12-12 Rare earth elements have significant effects on the high temper- ... Actually, a drug-eluting magnesium stent [24] and a magnesium screw consisting of MgYREZr (a mate-rial similar to WE43) that contains >90 wt.% magnesium [25] are already in clinical use. Despite the remarkable progress which was achieved in the
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Mito-Tracker Green，也称MitoTracker Green，是一种线粒体(mitochondria)绿色荧光探针，可以用于活细胞线粒体特异性荧光染色。 Mito-Tracker Green为采用Molecular Probes公司的carbocyanine进行了荧光标记的一种Mito-Tracker， 也称Benzoxazolium, 2-[3-[5,6 ...
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A brief review is given of the results of work done on the complex formation and complex elution of rare earths from ion exchangers is preseated. The type, structure, solubility velocity, stability, and stability range of the complexes formed were studied. (J.S.R.)
Read More2021-2-11 Recovery of rare earth elements from phosphogypsum waste in resin-in-leach process by eluting with biodegradable complexing Hydrometallurgy ( IF 3.338) Pub Date : 2021-02-02, DOI: 10.1016 Santeri Kurkinen, Sami Virolainen, Tuomo Sainio
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2020-8-6 The rare-earth elements are concentrated by eluting the sample solution through a chromatographic column filled with Dowex 50W-X8,200-400 mesh ion- exchange resin. The elution is performed with 2N HCl until strontium has come off the column, and then with 6N HC1 to obtain the rare-earths. No attempt is made to separate the rare-earths cleanly ...
Read More2017-3-8 The separation of rare earth elements by ion exchange was studied. The new eluting agent consists of an aqueous solution of diammonium hydrogencitrate and an aqueous ammoniaacetic acid mixture; the two solutions were mixed in definite ratios. Using a column of Dowex 50 W resin, the separation of Sm, Nd, Pr, Ge and La was successfully achieved.
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2017-3-8 The separation of rare earth elements by ion exchange was studied. The new eluting agent consists of an aqueous solution of diammonium hydrogencitrate and an
Read More2020-10-13 separation of rare earths in macro-quantities ; however, both have been used effectively for the separation of tracer quantities of the rare earths and actinides. Freiling and Bunney (10) have reported optimum conditions for rare-earth separations with ammonium lactate as the eluting agent.
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2018-8-15 to three column volumes of the eluting solution through the column. EDTA [disodium dlhydrogen (ethylenedinitrilo) tetraacetate dihydratej The EDTA was Baker Chemical Company "Analyzed Reagent". Metal ion solutions Stock solutions of the elements used were prepared 0.05M in metal ion. The rare earth solutions were prepared
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2019-5-26 The heavy rare-earth ions are known to have a higher affinity for the coordinating groups than the light rare-earth ions but an additional difference in selectivity was observed between the different nanoparticles. The separation of pairs of rare-earth ions was found to be dependent on the substrate, namely the density of EDTA groups on the ...
Read MoreOF THE DISCLOSURE A process for the separation of yttrium from mixtures of yttrium and rare earth metals by eluting the ions through the hydrogen form of a cation exchange resin with aqueous solutions of hydroxyethylethylenediamine triacetic acid (HEDTA) and wherein the resin and elu trient solution are maintained at elevated temperatures in the range of about 32 to 95 C. is described.
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2021-3-11 Rare earth elements (REE) are elements that drive the development of new technologies in many sectors, including green energy. However, the supply chain of REE is subject to a complex set of technical, environmental, and geopolitical constraints. Some of these challenges may be circumvented if REE are recovered from naturally abundant alternative sources, such as saline waters and brines.
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