Extraction of Rare-Earth Elements from Chloride Solutions …
Abstract The extraction of rare-earth elements (REEs) from chloride solutions (0.01 M HCl + 0.1 M NaCl) in hexane–propanol–water ternary systems using a Cyanex 572 extractant is studied. A change in the component ratio is shown to have a significant effect on both the partition coefficients of REEs and their separation factors. …
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Life Cycle Assessment of Representative Individual Light Rare Earth
Light rare earth chlorides typically consist of lanthanum chloride, cerium chloride, praseodymium chloride and neodymium chloride. As the public concern on the issues of emission reduction and energy saving during the past decades, it is valuable to evaluate and analyze the comprehensive environmental impact caused by the rare earth …
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Neo Water Technologies
Rare earth chloride products have been used in over 50 facilities, from 0.02 MGD to 45 MGD in size, in states such as Wisconsin, ia, Pennsylvania, New York, Minnesota, Vermont, Ohio, Illinois, Indiana, Texas, Washington, and …
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OBSERVATIONS ON THE RARE EARTHS. XXIX. THE …
Über die Jodide der Ceriterdenelemente und die Neubestimmung der Schmelzpunkte der Chloride. Zeitschrift für anorganische und allgemeine Chemie 1929, 185 (1), 49-64.
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Extraction of rare earth metals (REMs) from chloride …
Present report delt with the studies on complexation of rare earth metals (REMs) present in chloride leach liquor of monazite with phosphoric extractant, di-2-ethylhexyl phosphoric acid (D2EHPA). Further, the co-ordination chemistry was studied by determining the complex formation, its structure and validation with standard …
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Separation of uranium and thorium from rare earths for rare earth …
Rare earth double salts first are converted to the corresponding RE hydroxide, and then are selectively dissolved by HCl, leaving thorium in the solid residue. Very small amounts of thorium and uranium in the rare earth chloride solution are removed by ion exchange (IX). The resin used is not disclosed. Download : Download full-size …
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An experimental study of the solubility of rare earth chloride …
The solubilities of the rare earth chlorides REECl 3, where REE = (La, Nd, Er), were measured in HCl bearing water vapor from 350 to 425 °C with water partial pressures ranging from 8 to 170 bar. Solubility data were fit to the Pitzer-Pabalan quasi-chemical model in order to extract thermodynamic parameters for the formation of the …
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Boosting the extraction of rare earth elements from chloride medium …
In addition, three weakly coordinating rare-earth chloride ions were involved in the rare-earth-containing complex according to the electroneutrality principle. Therefore, the extraction mechanism of Y(III) by ILs could be represented by the following equations: (10) Y aq 3 + + 1.5 N 444 Bn MA org + 3 Cl aq − = N 444 Bn 1.5 Y MA 1.5 Cl 3 org ...
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Safety Data Sheet
Synonyms: Rare Earth Chloride CAS Number: Proprietary Product Use: Aqueous phosphorous reduction media for waste water treatment Manufacturer/Supplier Identification: Neo Chemicals & Oxides, LLC 8101 E. Prentice Avenue, Suite 525 Greenwood Village, CO 80111 Telephone: +1 (303) 843-8040 Facsimile: +1 (303) 843 …
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Rare Earth Chlorides
Scandium Chloride Powder, Yttrium Chloride Powder, Lanthanum Chloride, Cerium Chloride, Praseodymium Chloride, Neodymium Chloride, Samarium Chloride, Europium Chloride, Gadolinium …
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Numerical Simulation on the Device of Rare Earth Oxide
Based on the industrial applications of jet pyrolysis technology and it being used for the production of rare earth oxides, the paper hopes to find out an efficient, economic, and environmental friendly new technology which is suitable for production of rare earth oxides. In this paper, a chloride pyrolysis water model is designed, and …
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Rare Earth Chemicals Suppliers
Manufacturer of rare earth chemicals for the aerospace, agricultural, automotive, laboratory, military, mining, oil field and wastewater treatment industries. Processes include chemical and physical vapor deposition, electrolysis, electroplating, spray, vibratory and distillation. High purity specifications range from 99 to 99.9999 % …
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Selective Separation of Rare Earth Chlorides Utilizing Vapor Phase
The objective of this research is to evaluate an alternative method for separating and recovering rare earth chlorides (RECl). Recent research demonstrated that rare earth oxides can be successfully converted to rare earth chlorides using ammonium chloride (NH 4 Cl) as the chloritizing agent [2, 3]. The conversion proceeds according to …
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Rare Earth Metals Metallurgy | SpringerLink
In chloride electrolysis process, the rare earth chloride is dissociated into rare earth ion (RE 3+) and chlorine ion (Cl-) in a chloride-fused salt. Under the effect of DC electric field, the rare earth ions move toward the cathode and obtain electrons at the cathode, so as to precipitate liquid metal. The chlorine ions move toward the anode ...
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Processes | Free Full-Text | Solubility of Rare Earth …
Processes | Free Full-Text | Solubility of Rare Earth Chlorides in Ternary Water-Salt Systems in the Presence of a Fullerenol—C60 (OH)24 Nanoclusters at 25 °C. Models of …
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Rare Earth Technology in Wastewater Treatment
Rare earth chloride is 100 times less acidic than other coagulants. Rare earth chloride replaces other coagulants with a dose volume 25% or less. These two mechanisms combine to result in a reduction of acid addition of 300-500 times. Rare earth chloride reduces chemical alkalinity consumption by
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Rare Earth Chloride Materials | Rare Earth Chloride Supplier | Rare …
Rare Earth Chloride. Chloride is a salt compound formed by the combination of negatively charged chloride ions and positively charged cations of other elements. Rare earth chlorides are salts formed by the combination of rare earth elements and chlorine. The common rare earth chlorides are YCl3, LaCl3, CeCl3, NdCl3, GdCl3, TbCl3, HoCl3, …
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Extraction of Rare-Earth Elements from Chloride and Nitrate …
The extraction of rare-earth elements (REEs) from chloride (0.01 M HCl + 0.1 M NaCl) and nitrate (0.01 M HNO3 + 0.1 M NaNO3) solutions in ternary hexane–isopropanol–water systems with the use of di(2-ethylhexyl)phosphoric acid (D2EHPA) as an extragent is studied. It is shown that the extractability of rare-earth …
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Aqueous Rare-Earth Chloride Solutions
Preparation of Solutions The rare-earth chloride solutions were prepared by dis solution of the appropriate oxide in hydrochloric acid. The rare-earth oxides were obtained from the rare-earth separation group of the Ames Laboratory of the Atomic Energy Commission. Purity of the oxides was established by emission spectro graphic analysis ...
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Processes | Free Full-Text | Solubility of Rare Earth Chlorides …
The solubility in triple water-salt systems containing NdCl3, PrCl3, YCl3, TbCl3 chlorides, and water-soluble fullerenol C60(OH)24 at 25 °C was studied by isothermal saturation in ampoules. The analysis for the content of rare earth elements was carried out by atomic absorption spectroscopy, for the content of fullerenol—by electronic …
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Boosting the extraction of rare earth elements from …
Boosting the extraction of rare earth elements from chloride medium by novel carboxylic acid based ionic liquids - ScienceDirect. Journal of Molecular Liquids. …
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Thermodynamics of crystal hydrates of rare-earth metal …
Work of desolvation values for rare-earth-metal perchlorate, chloride, and nitrate electrolytes across the rare-earth-metal series from 0.1 to 1 m are relatively uniform and are in the sequence of perchlorates > chlorides > nitrates. Changes in T..delta..S in this region are in the sequence of perchlorates > nitrate > chlorides and reveal a ...
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The dehydration schemes of rare-earth chlorides
The dehydration schemes of rare-earth chlorides. V. Hong, J. Sundström. Published 24 November 1997. Chemistry, Materials Science. Thermochimica Acta. View …
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PREPARATION OF RARE-EARTH CHLORIDE SOLUTIONS
Abstract. A chemical process for preparing solutions of trivalent rare-earth chlorides from sulfate solutions obtained by treating bastnasite concentrate is described. The chief irapurity in the fical solution is cerium, and this element is less than 1 percent of the rare-earth oxides. The solution is used directly in the separation of rare ...
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Journal of Applied Polymer Science | Wiley Online Library
Coordination copolymerization of butadiene and isoprene with rare earth chloride–alcohol–aluminum trialkyl catalytic systems ... and monomer reactivity ratios for catalytic systems containing various rare earth elements in III-B family and different solvents were determined.
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Review of efficient recycling and resource utilization for rare earth
The molten salt electrolysis method includes rare earth fluoride (REF 3-LiF-RE 2 O 3) and rare earth chloride (RECl 3-MeCl x) two systems. Fig. 3 shows the electrolysis production process of rare earth molten salt. Compared to the latter, the fluoride system has the advantages of higher current efficiency and metal yield, stable electrolyte …
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Reduction of Rare Earth Elements Through Electrochemical …
The rare earth precursors (e.g., oxide, fluoride or chloride) must be purified before reduction as minor impurities that are more noble will also be reduced and cannot be easily removed. This purification step is accomplished through mineral processing and hydrometallurgy using leaching, solvent extraction, and ion exchange.
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Isopiestic determination of the activity coefficients of some …
Isopiestic Studies on Rare Earth Chloride Quaternary System (H2O + LaCl3 + PrCl3 + NdCl3) and Ternary Subsystems. Journal of Chemical & Engineering Data 2013, 58 (9) ... IUPAC-NIST Solubility Data Series. 87. Rare Earth Metal Chlorides in Water and Aqueous Systems. Part 1. Scandium Group (Sc, Y, La).
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Rare earth elements in chloride-rich groundwater, Palo Duro …
Rare earth element (REE) data for groundwater samples from the Deep-Basin Brine aquifer of the Palo Duro Basin, Texas, USA, illustrates the potential use of REE for inferring groundwater flow paths through different geologic materials. The REE content of the groundwaters range over 2.5 orders of magnitude and are depleted by 10 2 to 10 5 ...
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