Published 2020 | Version v1
Journal article Metadata-only

Preliminary study on separation of Dy and Nd by multi-step extraction using TDdDGA

Creators

  • 1. Japan Atomic Energy Agency, Tokai, Ibaraki (Japan)
  • 2. Yokohama National University, Yokohama, Kanagawa (Japan)
  • 3. National Institute of Technology, Tokyo College, Hachioji, Tokyo (Japan)

Description

Mutual separation technique of Dy and Nd in Nd magnets is studied. Dy is more valuable than Nd, and therefore, Dy should be isolated and reused. Lanthanide elements can be extracted thoroughly by using diglycolamide (DGA) extractants, and we use this reagent to recover and isolate Dy. N,N,N',N'-TetradodecylDGA (TDdDGA) has a relatively high separation factor (SF) between Dy and Nd (SF: over 10) in the HNO3 extraction system, so multi-step extraction using TDdDGA is applied to mutually separate them. In the present study, by using the condition, four extraction steps, organic phase: 0.1 M TDdDGA in n-dodecane, aqueous phase: 0.3 M HNO3, 92% Dy can be recovered with 0.7% co-extraction of Nd. (author)

Availability note (English)

Available from DOI: https://doi.org/10.15261/serdj.27.63

Additional details

Identifiers

DOI
10.15261/serdj.27.63;

Publishing Information

Journal Title
Solvent Extraction Research and Development, Japan (Online)
Journal Volume
27
Journal Issue
1
Journal Page Range
p. 63-67
ISSN
2188-4765

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
52072973
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AMBIENT TEMPERATURE; CONCENTRATION RATIO; DODECANE; DYSPROSIUM; HYDROMETALLURGY; ICP MASS SPECTROSCOPY; ISOTOPE SEPARATION; NEODYMIUM; NITRIC ACID; PERMANENT MAGNETS; SOLVENT EXTRACTION
Descriptors DEC
ALKANES; DIMENSIONLESS NUMBERS; ELEMENTS; EQUIPMENT; EXTRACTION; EXTRACTIVE METALLURGY; HYDROCARBONS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; MAGNETS; MASS SPECTROSCOPY; METALLURGY; METALS; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; RARE EARTHS; SEPARATION PROCESSES; SPECTROSCOPY

Optional Information

Notes
10 refs., 4 figs.