Preparation of rare earth oxalate ultrafine particles in emulsion liquid membrane system using carboxylic acid as cation carrier

被引:15
作者
Hirai, T [1 ]
Okamoto, N [1 ]
Komasawa, I [1 ]
机构
[1] Osaka Univ, Grad Sch Engn Sci, Dept Sci & Chem Engn, Toyonaka, Osaka 5608531, Japan
关键词
fine particle; rare earth oxalate; emulsion liquid membrane; extraction; precipitation;
D O I
10.1252/jcej.31.474
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The preparation of oxalate particles of Y and Pr is carried out by using an emulsion liquid membrane (ELM, W/O/W emulsion) system, consisting of Span 83 (sorbitan sesquioleate) as a surfactant and VA-IO (2-methyl-2-ethyl heptanoic acid) as an extractant (cation carrier). The rare earth ions are extracted from the external water phase and are stripped into the internal water phase to precipitate by the reaction with oxalic acid. Oxalate particles, 20-60 nm in size, are obtained for both rare earth elements, together with a smaller amount of submicron-sized spherical aggregates. This result is rather different from that obtained in the ELM system employing EHPNA (2-ethylhexylphosphonic acid mono-2-ethylhexyl ester) as an extractant, where oxalate particles of heavier rare earths such as Y are hardly obtained. Calcination of the resulting particles easily gives Y2O3 particles of about 50 mm in size and Pr6O11 particles of submicron-size.
引用
收藏
页码:474 / 477
页数:4
相关论文
共 8 条
  • [1] The preparation of calcium carbonate in an emulsified liquid membrane
    Davey, RJ
    Hirai, T
    [J]. JOURNAL OF CRYSTAL GROWTH, 1997, 171 (1-2) : 318 - 320
  • [2] Preparation of spherical oxalate particles of rare earths in emulsion liquid membrane system
    Hirai, T
    Okamoto, N
    Komasawa, I
    [J]. AICHE JOURNAL, 1998, 44 (01) : 197 - 206
  • [3] Preparation of copper oxalate fine particles using emulsion liquid membrane system
    Hirai, T
    Nagaoka, K
    Okamoto, N
    Komasawa, I
    [J]. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1996, 29 (05) : 842 - 850
  • [4] Biomimetic synthesis of calcium carbonate particles in a pseudovesicular double emulsion
    Hirai, T
    Hariguchi, S
    Komasawa, I
    Davey, RJ
    [J]. LANGMUIR, 1997, 13 (25) : 6650 - 6653
  • [5] PRECIPITATION STRIPPING OF NEODYMIUM FROM CARBOXYLATE EXTRACTANT WITH AQUEOUS OXALIC-ACID SOLUTIONS
    KONISHI, Y
    ASAI, S
    MURAI, T
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1993, 32 (05) : 937 - 942
  • [6] PREPARATION OF MONOSIZED ULTRAFINE PARTICLES OF PRECIOUS METALS UTILIZING AN EMULSION-TYPE LIQUID MEMBRANE TECHNIQUE
    MAJIMA, H
    HIRATO, T
    AWAKURA, Y
    HIBI, T
    [J]. METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1991, 22 (04): : 397 - 404
  • [7] PRECIPITATION STRIPPING OF SAMARIUM OXALATE FROM ORGANIC SOLUTION CONTAINING ACID TYPE EXTRACTANT BY OXALIC-ACID
    SANUKI, S
    SUGIYAMA, A
    TUNEKAWA, M
    KADOMACHI, K
    ARAI, K
    [J]. JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1994, 58 (11) : 1271 - 1278
  • [8] THE PRECIPITATION OF SOLIDS IN A LIQUID MEMBRANE EMULSION - THE CONTROL OF PARTICLE-SIZE
    YANG, M
    DAVIES, GA
    GARSIDE, J
    [J]. POWDER TECHNOLOGY, 1991, 65 (1-3) : 235 - 242