Electrochemical separation of Dy and Nd from Nd magnet scrap in amolten LiCl-KCl

Hirokazu Konishi; Hideki Ono; Eiichi Takeuchi; Toshiyuki Nohira; Tetsuo Oishi

doi:10.1007/978-3-319-48214-9_33

Electrochemical separation of Dy and Nd from Nd magnet scrap in amolten LiCl-KCl

Hirokazu Konishi, Hideki Ono, Eiichi Takeuchi, Toshiyuki Nohira, Tetsuo Oishi

Materials Design and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

The Dy-Nd-Pr-Ni alloy sample was prepared by cathodic potentiostatic electrolysis at 0.65 V (vs. Li⁺/Li) for 1 h using a Ni plate in a molten LiCl-KCl-DyCl₃-NdCl₃-PrCl₃ system at 723 K. The highest mass ratio (Dy/Nd+Pr) in the alloy sample was observed to be 50 at 0.65 V. Anodic potentiostatic electrolysis at 2.20 V for 12 h was conducted using the Nd-Fe-B magnet electrode in a molten LiCl-KCl system. All elements were almost dissolved from the magnet, and the original form of the magnet disintegrated. After anodic potentiostatic electrolysis at 2.20 V, cathodic potentiostatic electrolysis was conducted at 1.00 V for 5 h using a Mo plate in order to remove the dissolved Fe from the bath. Finally, cathodic potentiostatic electrolysis was conducted at 0.65 V for 12 h using a Ni plate. The mass ratio of Dy/Nd in the alloy sample was determined to be about 18.

Original language	English
Title of host publication	EPD Congress 2015
Publisher	Springer International Publishing
Pages	287-294
Number of pages	8
ISBN (Electronic)	9783319482149
ISBN (Print)	9781119082453
DOIs	https://doi.org/10.1007/978-3-319-48214-9_33
State	Published - 2016/01/01

Keywords

Electrolysis
Molten salt
Rare earth
Separation

ASJC Scopus subject areas

General Engineering
General Materials Science

Access to Document

10.1007/978-3-319-48214-9_33

Cite this

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title = "Electrochemical separation of Dy and Nd from Nd magnet scrap in amolten LiCl-KCl",

abstract = "The Dy-Nd-Pr-Ni alloy sample was prepared by cathodic potentiostatic electrolysis at 0.65 V (vs. Li+/Li) for 1 h using a Ni plate in a molten LiCl-KCl-DyCl3-NdCl3-PrCl3 system at 723 K. The highest mass ratio (Dy/Nd+Pr) in the alloy sample was observed to be 50 at 0.65 V. Anodic potentiostatic electrolysis at 2.20 V for 12 h was conducted using the Nd-Fe-B magnet electrode in a molten LiCl-KCl system. All elements were almost dissolved from the magnet, and the original form of the magnet disintegrated. After anodic potentiostatic electrolysis at 2.20 V, cathodic potentiostatic electrolysis was conducted at 1.00 V for 5 h using a Mo plate in order to remove the dissolved Fe from the bath. Finally, cathodic potentiostatic electrolysis was conducted at 0.65 V for 12 h using a Ni plate. The mass ratio of Dy/Nd in the alloy sample was determined to be about 18.",

keywords = "Electrolysis, Molten salt, Rare earth, Separation",

author = "Hirokazu Konishi and Hideki Ono and Eiichi Takeuchi and Toshiyuki Nohira and Tetsuo Oishi",

note = "Publisher Copyright: {\textcopyright} 2016 by The Minerals. Metals & Materials Society.",

year = "2016",

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day = "1",

doi = "10.1007/978-3-319-48214-9_33",

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T1 - Electrochemical separation of Dy and Nd from Nd magnet scrap in amolten LiCl-KCl

AU - Konishi, Hirokazu

AU - Ono, Hideki

AU - Takeuchi, Eiichi

AU - Nohira, Toshiyuki

AU - Oishi, Tetsuo

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The Dy-Nd-Pr-Ni alloy sample was prepared by cathodic potentiostatic electrolysis at 0.65 V (vs. Li+/Li) for 1 h using a Ni plate in a molten LiCl-KCl-DyCl3-NdCl3-PrCl3 system at 723 K. The highest mass ratio (Dy/Nd+Pr) in the alloy sample was observed to be 50 at 0.65 V. Anodic potentiostatic electrolysis at 2.20 V for 12 h was conducted using the Nd-Fe-B magnet electrode in a molten LiCl-KCl system. All elements were almost dissolved from the magnet, and the original form of the magnet disintegrated. After anodic potentiostatic electrolysis at 2.20 V, cathodic potentiostatic electrolysis was conducted at 1.00 V for 5 h using a Mo plate in order to remove the dissolved Fe from the bath. Finally, cathodic potentiostatic electrolysis was conducted at 0.65 V for 12 h using a Ni plate. The mass ratio of Dy/Nd in the alloy sample was determined to be about 18.

AB - The Dy-Nd-Pr-Ni alloy sample was prepared by cathodic potentiostatic electrolysis at 0.65 V (vs. Li+/Li) for 1 h using a Ni plate in a molten LiCl-KCl-DyCl3-NdCl3-PrCl3 system at 723 K. The highest mass ratio (Dy/Nd+Pr) in the alloy sample was observed to be 50 at 0.65 V. Anodic potentiostatic electrolysis at 2.20 V for 12 h was conducted using the Nd-Fe-B magnet electrode in a molten LiCl-KCl system. All elements were almost dissolved from the magnet, and the original form of the magnet disintegrated. After anodic potentiostatic electrolysis at 2.20 V, cathodic potentiostatic electrolysis was conducted at 1.00 V for 5 h using a Mo plate in order to remove the dissolved Fe from the bath. Finally, cathodic potentiostatic electrolysis was conducted at 0.65 V for 12 h using a Ni plate. The mass ratio of Dy/Nd in the alloy sample was determined to be about 18.

KW - Electrolysis

KW - Molten salt

KW - Rare earth

KW - Separation

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U2 - 10.1007/978-3-319-48214-9_33

DO - 10.1007/978-3-319-48214-9_33

M3 - 章

AN - SCOPUS:85028836462

SN - 9781119082453

SP - 287

EP - 294

BT - EPD Congress 2015

PB - Springer International Publishing

ER -

Electrochemical separation of Dy and Nd from Nd magnet scrap in amolten LiCl-KCl

Abstract

Keywords

ASJC Scopus subject areas

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