Preparation and evaluation of high-purity La2O3

Gwang Seop Lee; Masahito Uchikoshi; Kouji Mimura; Minoru Isshiki

doi:10.1007/s11663-010-9348-6

Preparation and evaluation of high-purity La₂O₃

Gwang Seop Lee, Masahito Uchikoshi, Kouji Mimura, Minoru Isshiki

Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A separation procedure based on extraction chromatography using the di(2-ethylhexyl) phosphoric acid (D2EHPA) impregnated resin, anion exchange with DIAION SA 10 resin, and oxalate precipitation has been developed for the preparation of high-purity La₂O₃ in hydrochloric acid media at a high La concentration. The metallic impurities Ce, Pr, Nd, Sm, K, Mg, Ca, Zn, Cu, Co, Mn, Pb, Al, In, and Fe, but not Bi, were removed efficiently from La by extraction chromatography using a D2EHPA impregnated resin. The Bi was separated from the La by anion exchange (DIAION SA 10) separation. Thus, a high-purity LaCl₃ solution was obtained by anion exchange separation and extraction chromatography. La₂O₃ was prepared from the purified LaCl₃ solution by oxalate precipitation. Glow discharge mass spectrometry was applied for purity evaluation of the prepared La ₂O₃. The purity of the prepared La₂O ₃ was more than 99.9998 pct total rare earth oxide.

Original language	English
Pages (from-to)	509-519
Number of pages	11
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	41
Issue number	3
DOIs	https://doi.org/10.1007/s11663-010-9348-6
Publication status	Published - 2010 Jun

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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title = "Preparation and evaluation of high-purity La2O3",

abstract = "A separation procedure based on extraction chromatography using the di(2-ethylhexyl) phosphoric acid (D2EHPA) impregnated resin, anion exchange with DIAION SA 10 resin, and oxalate precipitation has been developed for the preparation of high-purity La2O3 in hydrochloric acid media at a high La concentration. The metallic impurities Ce, Pr, Nd, Sm, K, Mg, Ca, Zn, Cu, Co, Mn, Pb, Al, In, and Fe, but not Bi, were removed efficiently from La by extraction chromatography using a D2EHPA impregnated resin. The Bi was separated from the La by anion exchange (DIAION SA 10) separation. Thus, a high-purity LaCl3 solution was obtained by anion exchange separation and extraction chromatography. La2O3 was prepared from the purified LaCl3 solution by oxalate precipitation. Glow discharge mass spectrometry was applied for purity evaluation of the prepared La 2O3. The purity of the prepared La2O 3 was more than 99.9998 pct total rare earth oxide.",

author = "Lee, {Gwang Seop} and Masahito Uchikoshi and Kouji Mimura and Minoru Isshiki",

year = "2010",

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doi = "10.1007/s11663-010-9348-6",

language = "English",

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AU - Lee, Gwang Seop

AU - Uchikoshi, Masahito

AU - Mimura, Kouji

AU - Isshiki, Minoru

PY - 2010/6

Y1 - 2010/6

N2 - A separation procedure based on extraction chromatography using the di(2-ethylhexyl) phosphoric acid (D2EHPA) impregnated resin, anion exchange with DIAION SA 10 resin, and oxalate precipitation has been developed for the preparation of high-purity La2O3 in hydrochloric acid media at a high La concentration. The metallic impurities Ce, Pr, Nd, Sm, K, Mg, Ca, Zn, Cu, Co, Mn, Pb, Al, In, and Fe, but not Bi, were removed efficiently from La by extraction chromatography using a D2EHPA impregnated resin. The Bi was separated from the La by anion exchange (DIAION SA 10) separation. Thus, a high-purity LaCl3 solution was obtained by anion exchange separation and extraction chromatography. La2O3 was prepared from the purified LaCl3 solution by oxalate precipitation. Glow discharge mass spectrometry was applied for purity evaluation of the prepared La 2O3. The purity of the prepared La2O 3 was more than 99.9998 pct total rare earth oxide.

AB - A separation procedure based on extraction chromatography using the di(2-ethylhexyl) phosphoric acid (D2EHPA) impregnated resin, anion exchange with DIAION SA 10 resin, and oxalate precipitation has been developed for the preparation of high-purity La2O3 in hydrochloric acid media at a high La concentration. The metallic impurities Ce, Pr, Nd, Sm, K, Mg, Ca, Zn, Cu, Co, Mn, Pb, Al, In, and Fe, but not Bi, were removed efficiently from La by extraction chromatography using a D2EHPA impregnated resin. The Bi was separated from the La by anion exchange (DIAION SA 10) separation. Thus, a high-purity LaCl3 solution was obtained by anion exchange separation and extraction chromatography. La2O3 was prepared from the purified LaCl3 solution by oxalate precipitation. Glow discharge mass spectrometry was applied for purity evaluation of the prepared La 2O3. The purity of the prepared La2O 3 was more than 99.9998 pct total rare earth oxide.

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ER -

Preparation and evaluation of high-purity La₂O₃

Abstract

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