scholarly journals The Analysis of Price Fluctuation Cycle of Rare Earth Neodymium Oxide and Dysprosium Oxide

2019 ◽  
Author(s):  
Binqing Yang ◽  
Xianping Zhang ◽  
Pengwei Xu
Keyword(s):  
Rare Earth ◽  
Neodymium Oxide ◽  
Dysprosium Oxide ◽  
Price Fluctuation

scholarly journals Environmentally friendly comprehensive hydrometallurgical method development for neodymium recovery from mixed rare earth aqueous solutions using organo-phosphorus derivatives

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Verónica Cristina Arellano Ruiz ◽  
Rambabu Kuchi ◽  
Pankaj Kumar Parhi ◽  
Jin-Young Lee ◽  
Rajesh Kumar Jyothi
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Method Development ◽  
Neodymium Oxide ◽  
Selective Extraction ◽  
Extractant Concentration ◽  
Cyanex 272 ◽  
Extraction Behavior ◽  
Technology Applications ◽  
Hydrometallurgical Method

Abstract Rare earth elements (REEs) have obtained a greatest significant in human lives owing to their important roles in various high technology applications. The present method development was deal technology important REEs such as neodymium, terbium and dysprosium, selective extraction with possible separation and recovery studies, successfully. The chloride mediated mixed aqueous solution containing 1500 mg/L each of REEs such as Nd, Tb and Dy was subjected at selective separation of Nd from other associated REEs. Three organo-phosphorous based commercial extracting agents such as Cyanex 272, PC 88A and D2EHPA, were employed for the extraction, possible separation and recovery of rare earth elements. A comparative extraction behavior of all these three extractants as function of time, pH influence, extractant concentration, temperature and diluents were systematically investigated. The extraction tendency of organo-phosphorus reagents towards the extraction of either of the REEs follows of the sequence as: D2EHPA > PC 88A > Cyanex 272. The thermodynamic behavior of either of the extractants on liquid–liquid extraction processing of REEs was investigated and thermodynamic calculations were calculated and presented. Substantial recovery of neodymium oxalate followed by its calcined product as neodymium oxide was ascertained from XRD study and SEM–EDS analysis.

scholarly journals Activation of NF-κB signaling in rare earth neodymium oxide particle-induced acute lung injury

2015 ◽  
Vol 4 (6) ◽  
pp. 1587-1596 ◽  
Author(s):  
Suhua Wang ◽  
Yanrong Gao ◽  
Lihua Huang ◽  
Shanshan Zheng ◽  
Chunxia Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Acute Lung Injury ◽  
Lung Injury ◽  
Signaling Pathway ◽  
Lung Inflammation ◽  
Oxide Particle ◽  
Neodymium Oxide ◽  
Activation Mechanism ◽  
Acute Lung Inflammation

The activation mechanism of the NF-κB signaling pathway in Nd2O3exposure-induced acute lung inflammation and pneumoconiosis.

The Hydrogen–Oxygen Reaction on Lanthanide Oxides. I. Hydrogen and Oxygen Adsorption on Some Lanthanide Oxides

1972 ◽  
Vol 50 (4) ◽  
pp. 490-496 ◽  
Author(s):  
John F. Read
Keyword(s):  
High Temperatures ◽  
Metal Ion ◽  
Hydrogen Adsorption ◽  
Freundlich Isotherm ◽  
Isosteric Heat ◽  
Neodymium Oxide ◽  
Oxygen Adsorption ◽  
Lanthanide Oxides ◽  
Dysprosium Oxide ◽  
Temperature Ranges

Hydrogen and oxygen adsorption have been measured on neodymium oxide and dysprosium oxide from 77 to 771 °K up to equilibrium pressures of approximately 6 Torr. In addition, hydrogen adsorption measurements have been made on samarium oxide and gadolinium oxide from 77 °K to approximately 100 °K. The adsorption is effectively instantaneous in all cases except for oxygen adsorption on neodymium oxide at 491 and 541 °K. Adsorption appears to be dissociative for all cases studied except for hydrogen adsorption on neodymium oxide at all temperatures and for hydrogen adsorption on dysprosium oxide at high temperatures. For neodymium oxide and dysprosium oxide three types of adsorption are observed in different temperature ranges. At low temperatures, the adsorption is probably physical; at intermediate temperatures, it is either physical, or chemical on isolated double sites; and at high temperatures it is chemical. In general, the Freundlich isotherm gives the highest correlation between calculated and experimental data. The isosteric heat of adsorption and the equilibrium uptake of hydrogen increase as the ionic radius of the metal ion decreases.

scholarly journals The gyromagnetic ratio for paramagnetic substances. III.—Results on salts of the rare earth group

1932 ◽  
Vol 135 (826) ◽  
pp. 276-281 ◽  
Keyword(s):  
Rare Earth ◽  
Magnetic Moment ◽  
Gyromagnetic Ratio ◽  
Orbital Moment ◽  
Dysprosium Oxide ◽  
Magnetic Susceptibilities ◽  
Splitting Factor ◽  
Increased Sensitivity ◽  
Paramagnetic Substance ◽  
The Rare Earth

In a previous paper (referred to in what follows as I) a method for measuring the gyromagnetic ratio for paramagnetic substances was described, together with the results of experiments on a strongly paramagnetic substance, dysprosium oxide. The ratio of the angular momentum produced by a given change of magnetic moment gives the Landé splitting factor, which in the case of the Dy +++ ion was found to be 1·28. This indicates that the magnetic moment is composed of both orbital and spin contributions, and agrees well with the theoretical value of 1·33 for the state 6 H 15/2 deduced by Hund as being the most probable for this ion. In a further contribution (II), the apparatus was used for similar measurements on some salts of the iron group, an account being given of the means used to obtain the necessary increased sensitivity. The results, taken as a whole, show that the only tenable view advanced to explain the magnetic susceptibilities of ions of this group is that of Stoner, i. e ., that the spin and orbital moments are quantised separately relative to the field axis, and further, the orbital moment may be wholly or partially suppressed by the fields of neighbouring ions. The present paper deals with measurements on some oxides of the rare earth group. The apparatus used was identical with that designed for increased sensitivity and described in II, so that no further description is necessary.

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