ジ-2-エチルヘキシル-リン酸による塩酸溶液からの液-液抽出 Liquid-Liquid Extraction of Molybdenum (VI) from Hydrochloric Acid Solutions by Di-(2-Ethylhexyl)-Phosphoric Acid

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The extraction of molybdenum (VI) from hydrochloric acid solutions by di-(2-ethylhexyl)-phosphoric acid (DEHPA, HX) in kerosene and benzene has been investigated under different conditions. The infrared, nuclear magnetic resonance and electronic absorption spectra measurements were made of the organic extracts. As the results, it is found that the extraction of molybdenum(VI) at low aqueous acidity ([HC1] ≤ 3 mol dm<SUP>-3</SUP>) is governed by a cation-exchange reaction and at higher acidity ([HC1] ≥ 3 mol dm<SUP>-3</SUP>) by a solvating reaction : at low acidity, MoO<SUb>2</SUb><SUP>2+</SUP>(aq) + 2(HX)<SUb>2</SUb>(org)↔MoO<SUb>2</SUb>X<SUb>4</SUb>H<SUb>2</SUb>(org) + 2H<SUP>+</SUP> (aq) ; at higher acidity, MoO<SUb>2</SUb>Cl<SUb>2</SUb>(aq) + (HX)<SUb>2</SUb>(org)↔MoO<SUb>2</SUb>Cl<SUb>2</SUb>·2HX(org). Accordingly the monomeric complexes MoO<SUb>2</SUb>X<SUb>4</SUb>H<SUb>2</SUb> and MoO<SUb>2</SUb>Cl<SUb>2</SUb>·2HX, indicating the coordination number of six for molybdenum as the octahedral structure, are formed in the extraction from aqueous solutions at low and higher acidities, respectively.

収録刊行物

  • Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan  

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan 123(1), 39-44, 2007-01-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10018749174
  • NII書誌ID(NCID)
    AA12188381
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    18816118
  • NDL 記事登録ID
    8729131
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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