Nd/Dy Resolution by SPE-Based Elution Chromatography with Bis(2-ethylhexyl) Phosphate (HDEHP)-Impregnated Fiber-Packed Bed

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  • Sasaki Taka-aki
    Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
  • Uchiyama Shoichiro
    Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
  • Fujiwara Kunio
    Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University KJK Co., Ltd.
  • Sugo Takanobu
    KJK Co., Ltd.
  • Umeno Daisuke
    Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
  • Saito Kyoichi
    Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University

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Other Title
  • リン酸ビス（2-エチルヘキシル）（HDEHP）担持繊維充填カラムを用いた固相抽出法に基づく溶出クロマトグラフィーによるNdとDyの分離
  • リンサン ビス(2-エチルヘキシル)(HDEHP)タンジセンイ ジュウテン カラム オ モチイタ コソウ チュウシュツホウ ニ モトズク ヨウシュツクロマトグラフィー ニ ヨル Nd ト Dy ノ ブンリ

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Abstract

Bis(2-ethylhexyl) phosphate (HDEHP) as an acidic extractant was impregnated onto a polymer chain grafted onto a 6-nylon fiber at a density of 0.43 mol/kg-product. Neodymium and dysprosium ions loaded onto the fiber packed into a bed were separated by elution chromatography using 0.2, 0.3, and 1.5 M hydrochloric acid as an eluent. At various space velocities and loaded amounts, the HDEHP-impregnated fiber-packed bed exhibited a higher peak height and a narrower half width because of shorter diffusional mass-transfer path of ions and larger external area per volume. The leakage of HDEHP impregnated was found to be negligible.

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