scholarly journals A facile method for the simultaneous recovery of rare-earth elements and transition metals from Nd–Fe–B magnets

2020 ◽  
Vol 22 (4) ◽  
pp. 1105-1112 ◽  
Author(s):  
Xuan Xu ◽  
Saso Sturm ◽  
Zoran Samardzija ◽  
Janez Scancar ◽  
Katarina Markovic ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metals ◽  
Rare Earth Elements ◽  
Closed Loop ◽  
Selective Precipitation ◽  
Precipitation Procedure

A closed loop of recovering rare-earth elements and transition metals from Nd–Fe–B magnets with the total re-use of the electrolyte using a facile electrolysis-selective precipitation procedure.

Rare earth recovery from end-of-life motors employing green chemistry design principles

2016 ◽  
Vol 18 (3) ◽  
pp. 753-759 ◽  
Author(s):  
H. M. Dhammika Bandara ◽  
Kathleen D. Field ◽  
Marion H. Emmert
Keyword(s):  
Rare Earth ◽  
Green Chemistry ◽  
Rare Earth Elements ◽  
End Of Life ◽  
Recovery Rate ◽  
Design Principles ◽  
Selective Dissolution ◽  
Selective Precipitation ◽  
Efficient Process ◽  
Efficient Separation

This manuscript describes the development of an efficient process for the recovery of rare earth elements from materials mixtures such as in motors with a recovery rate of >80%. Selective dissolution enables efficient separation of steel and copper and selective precipitation of RE salts is the key for obtaining pure RE products.

New preparation and recycling procedure to recover rare earth elements from magnets by using a closed loop treatment

2016 ◽  
Vol 125 (4) ◽  
pp. 204-210 ◽  
Author(s):  
P. Stuhlpfarrer ◽  
S. Luidold ◽  
H. Schnideritsch ◽  
H. Antrekowitsch
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Closed Loop

scholarly journals Content and Distribution of Transition Metals and Rare Earth Elements in Magnetically and Mechanically Separated Brown Coal Ash

2013 ◽  
Vol 18 (3) ◽  
pp. 365-369 ◽  
Author(s):  
Sh.R. Malikov ◽  
V.P. Pikul ◽  
N.M. Mukhamedshina ◽  
V.N. Sandalov ◽  
S. Kudiratov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metals ◽  
Rare Earth Elements ◽  
Brown Coal ◽  
Coal Ash

Ferromagnetism in GaN doped with transition metals and rare-earth elements: A review

2018 ◽  
Vol 56 (4) ◽  
pp. 1570-1577 ◽  
Author(s):  
M. Shakil ◽  
Abrar Hussain ◽  
M. Zafar ◽  
Shabir Ahmad ◽  
M.I. Khan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metals ◽  
Rare Earth Elements

scholarly journals Nd(III) and Gd(III) Sorption on Mesoporous Amine-Functionalized Polymer/SiO2 Composite

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1049
Author(s):  
Khalid A. M. Salih ◽  
Mohammed F. Hamza ◽  
Hamed Mira ◽  
Yuezhou Wei ◽  
Feng Gao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
High Selectivity ◽  
Chemical Properties ◽  
Rare Earth Ions ◽  
High Tech ◽  
Low Grade ◽  
Selective Precipitation ◽  
Composite Support ◽  
Functionalized Mesoporous Silica

The strong demand for rare-earth elements (REEs) is driven by their wide use in high-tech devices. New processes have to be developed for valorizing low-grade ores or alternative metal sources (such as wastes and spent materials). The present work contributed to the development of new sorbents for the recovery of rare earth ions from aqueous solutions. Functionalized mesoporous silica composite was synthesized by grafting diethylenetriamine onto composite support. The physical and chemical properties of the new sorbent are characterized using BET, TGA, elemental analysis, titration, FTIR, and XPS spectroscopies to identify the reactive groups (amine groups: 3.25 mmol N g−1 and 3.41 by EA and titration, respectively) and their mode of interaction with Nd(III) and Gd(III). The sorption capacity at the optimum pH (i.e., 4) reaches 0.9 mmol Nd g−1 and 1 mmol Gd g−1. Uptake kinetics are modeled by the pseudo-first-order rate equation (equilibrium time: 30–40 min). At pH close to 4–5, the sorbent shows high selectivity for rare-earth elements against alkali-earth elements. This selectivity is confirmed by the efficient recovery of REEs from acidic leachates of gibbsite ore. After elution (using 0.5 M HCl solutions), selective precipitation (using oxalate solutions), and calcination, pure rare earth oxides were obtained. The sorbent shows promising perspective due to its high and fast sorption properties for REEs, good recycling, and high selectivity.

scholarly journals Examples of ordered or disordered ternary intermetallics containing rare earth elements and transition metals

2013 ◽  
Vol 69 (a1) ◽  
pp. s128-s129
Author(s):  
E. Gaudin ◽  
J. L. Bobet ◽  
S. Tencé ◽  
S. Couillaud ◽  
B. Chevalie
Keyword(s):  
Rare Earth ◽  
Transition Metals ◽  
Rare Earth Elements
Sign in / Sign up

Export Citation Format

Share Document