TY  - JOUR
AU  - Chung, Hanwen
AU  - Prasakti, Laras
AU  - Stopić, Srećko
AU  - Feldhaus, Dominic
AU  - Cvetković, Vesna S.
AU  - Friedrich, Bernd
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6107
AB  - The results obtained from the work on a concept of a recycling process for NdFeB magnets
to recover rare earth elements for remanufacturing similar magnets are presented. This paper
investigates the viability of extracting rare earth metals from magnet recycling-derived oxide (MRDO) by means of molten salt electrolysis. The MRDO was produced from spent NdFeB magnets through oxidation in air and subsequently carbothermic reduction under an 80 mbar Ar gas atmosphere. This MRDO contained roughly 33 wt.% Nd and 10 wt.% Pr. The electrochemical reduction process of the MRDO on molybdenum electrodes in NdF3 + LiF and NdF3 + PrF3 + LiF fused salts systems was investigated by cyclic voltammetry and chronoamperometry measurements. The resulting electrolytes and electrodes were examined after potentiostatic deposition by scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray diffraction (XRD) analysis. The electrodeposited metals appeared to accumulate on the cathode and X-ray diffraction analysis confirmed the formation of metallic Nd and Pr on the working substrate. The suitability of the obtained alloy intended for the remanufacturing of NdFeB magnets was then evaluated.
PB  - MDPI
T2  - Metals
T1  - Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)
VL  - 13
IS  - 3
SP  - 559
DO  - https://doi.org/10.3390/met13030559
ER  - 

@article{
author = "Chung, Hanwen and Prasakti, Laras and Stopić, Srećko and Feldhaus, Dominic and Cvetković, Vesna S. and Friedrich, Bernd",
year = "2023",
abstract = "The results obtained from the work on a concept of a recycling process for NdFeB magnets
to recover rare earth elements for remanufacturing similar magnets are presented. This paper
investigates the viability of extracting rare earth metals from magnet recycling-derived oxide (MRDO) by means of molten salt electrolysis. The MRDO was produced from spent NdFeB magnets through oxidation in air and subsequently carbothermic reduction under an 80 mbar Ar gas atmosphere. This MRDO contained roughly 33 wt.% Nd and 10 wt.% Pr. The electrochemical reduction process of the MRDO on molybdenum electrodes in NdF3 + LiF and NdF3 + PrF3 + LiF fused salts systems was investigated by cyclic voltammetry and chronoamperometry measurements. The resulting electrolytes and electrodes were examined after potentiostatic deposition by scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray diffraction (XRD) analysis. The electrodeposited metals appeared to accumulate on the cathode and X-ray diffraction analysis confirmed the formation of metallic Nd and Pr on the working substrate. The suitability of the obtained alloy intended for the remanufacturing of NdFeB magnets was then evaluated.",
publisher = "MDPI",
journal = "Metals",
title = "Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)",
volume = "13",
number = "3",
pages = "559",
doi = "https://doi.org/10.3390/met13030559"
}

Chung, H., Prasakti, L., Stopić, S., Feldhaus, D., Cvetković, V. S.,& Friedrich, B.. (2023). Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part). in Metals
MDPI., 13(3), 559.
https://doi.org/https://doi.org/10.3390/met13030559

Chung H, Prasakti L, Stopić S, Feldhaus D, Cvetković VS, Friedrich B. Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part). in Metals. 2023;13(3):559.
doi:https://doi.org/10.3390/met13030559 .

Chung, Hanwen, Prasakti, Laras, Stopić, Srećko, Feldhaus, Dominic, Cvetković, Vesna S., Friedrich, Bernd, "Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)" in Metals, 13, no. 3 (2023):559,
https://doi.org/https://doi.org/10.3390/met13030559 . .

TY  - CONF
AU  - Cvetković, Vesna S.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6345
AB  - Our contribution, made in joint research efforts of ICTM Institute, University of Belgrade 
with IME Institute, Aachen University, to the molten salt electrolysis within the field of recycling 
rare earth metals from end-of-life NdFeB magnets containing significant amounts of rare earth 
elements, was focused on the Nd-Pr alloy formation that could be fed directly back to the vacuum 
alloying step in the production of the new NdFeB magnets. In order to make extracting of individual 
rare earth metals for reuse in magnets or other materials economically viable, additional knowledge 
onto the electrodeposition of Nd and Pr from molten fluoride electrolyte had to be acquired. We 
started the investigation with the reaction mechanism of Nd electrodeposition and 
continued with simultaneous electrodeposition processes of neodymium and praseodymium.
PB  - Serbian Society of Corrosion and Materials Protection (UISKoZaM)
C3  - Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
T1  - Towards sustainable rare earth elements recovery
SP  - PLENARY-20
EP  - PLENARY-26
UR  - https://hdl.handle.net/21.15107/rcub_cer_6345
ER  - 

@conference{
author = "Cvetković, Vesna S.",
year = "2023",
abstract = "Our contribution, made in joint research efforts of ICTM Institute, University of Belgrade 
with IME Institute, Aachen University, to the molten salt electrolysis within the field of recycling 
rare earth metals from end-of-life NdFeB magnets containing significant amounts of rare earth 
elements, was focused on the Nd-Pr alloy formation that could be fed directly back to the vacuum 
alloying step in the production of the new NdFeB magnets. In order to make extracting of individual 
rare earth metals for reuse in magnets or other materials economically viable, additional knowledge 
onto the electrodeposition of Nd and Pr from molten fluoride electrolyte had to be acquired. We 
started the investigation with the reaction mechanism of Nd electrodeposition and 
continued with simultaneous electrodeposition processes of neodymium and praseodymium.",
publisher = "Serbian Society of Corrosion and Materials Protection (UISKoZaM)",
journal = "Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia",
title = "Towards sustainable rare earth elements recovery",
pages = "PLENARY-20-PLENARY-26",
url = "https://hdl.handle.net/21.15107/rcub_cer_6345"
}

Cvetković, V. S.. (2023). Towards sustainable rare earth elements recovery. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
Serbian Society of Corrosion and Materials Protection (UISKoZaM)., PLENARY-20-PLENARY-26.
https://hdl.handle.net/21.15107/rcub_cer_6345

Cvetković VS. Towards sustainable rare earth elements recovery. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia. 2023;:PLENARY-20-PLENARY-26.
https://hdl.handle.net/21.15107/rcub_cer_6345 .

Cvetković, Vesna S., "Towards sustainable rare earth elements recovery" in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia (2023):PLENARY-20-PLENARY-26,
https://hdl.handle.net/21.15107/rcub_cer_6345 .

TY  - CONF
AU  - Cvetković, Vesna S.
AU  - Petrović, Nataša M.
AU  - Feldhaus, Dominic
AU  - Prasakti, Laras
AU  - Friedrich, Bernd
AU  - Jovićević, Jovan N.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6756
AB  - In the present work, we investigated the off-gas emission during the Nd and Pr electrodeposition from oxy- fluoride melts by the in-situ FTIR-spectrometry to understand the nature of the reactions taking place on the anode and the mechanisms behind them.
PB  - Skopje : Society of chemists and technologists of Macedonia
C3  - Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia
T1  - Greenhouse gas emission from the rare earth metals electrolysis
SP  - 141
EP  - 141
UR  - https://hdl.handle.net/21.15107/rcub_cer_6756
ER  - 

@conference{
author = "Cvetković, Vesna S. and Petrović, Nataša M. and Feldhaus, Dominic and Prasakti, Laras and Friedrich, Bernd and Jovićević, Jovan N.",
year = "2023",
abstract = "In the present work, we investigated the off-gas emission during the Nd and Pr electrodeposition from oxy- fluoride melts by the in-situ FTIR-spectrometry to understand the nature of the reactions taking place on the anode and the mechanisms behind them.",
publisher = "Skopje : Society of chemists and technologists of Macedonia",
journal = "Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia",
title = "Greenhouse gas emission from the rare earth metals electrolysis",
pages = "141-141",
url = "https://hdl.handle.net/21.15107/rcub_cer_6756"
}

Cvetković, V. S., Petrović, N. M., Feldhaus, D., Prasakti, L., Friedrich, B.,& Jovićević, J. N.. (2023). Greenhouse gas emission from the rare earth metals electrolysis. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia
Skopje : Society of chemists and technologists of Macedonia., 141-141.
https://hdl.handle.net/21.15107/rcub_cer_6756

Cvetković VS, Petrović NM, Feldhaus D, Prasakti L, Friedrich B, Jovićević JN. Greenhouse gas emission from the rare earth metals electrolysis. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia. 2023;:141-141.
https://hdl.handle.net/21.15107/rcub_cer_6756 .

Cvetković, Vesna S., Petrović, Nataša M., Feldhaus, Dominic, Prasakti, Laras, Friedrich, Bernd, Jovićević, Jovan N., "Greenhouse gas emission from the rare earth metals electrolysis" in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia (2023):141-141,
https://hdl.handle.net/21.15107/rcub_cer_6756 .