Versatic Acid 10によるPrおよびNdの抽出におよぼす添加剤の効果

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  • Effect of Additive Agents on the Extraction of Pr and Nd with Versatic Acid 10
  • Versatic Acid10 ニ ヨル Pr オヨビ Nd ノ チュウシュツ

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The effect of additive agents on the extraction Pr and Nd was investigated by using Versatic Acid 10 as an extractant. Tri-octyl phosphine oxide(TOPO), 2-ethylhexanal oxime (EHO), di-hexyl sulfoxide(DHSO), di-hexyl sulfide(DHS), bis-2-ethylhexyl acetamide (BEHAA), TBP, LIX 63 and Alamin 308 were used as additives. The mechanism of Pr extraction was examined and the effect of diluent on the extraction was also studied for the Versatic Acid 10/EHO system.<BR>The extraction of Pr and Nd decreased by the use of additives except TOPO and LIX 63 owing to an interaction between Versatic Acid 10 and additives in the organic phase. Although the extraction decreased by the addition of EHO, BEHAA and DHSO, the separation factor of Pr and Nd was promoted due to a synergistic effect. The separation factors were 1.86, 1.83 and 1.50 for Versatic Acid 10/EHO, Versatic Acid 10/BEHAA and Versattc Acid 10/DHSO systems, respectively, instead of 1.22 for the extraction with Versatic Acid 10. The excess addition of EHO did not cause an increase in the separation factor. For the Versatic Acid 10/EHO system, the extracted species of Pr was found to be PrR3·3HR·EHO·H2O and the extraction equilibrium was expressed as<BR>(This article is not displayable. Please see full text pdf.) <BR>\oindentwhere H2R2 and HR were the dimeric and monomeric forms of Versatic Acid 10. The diluent affected the extraction and separation factor of Pr and Nd. The extraction decreased by the use of diluents of a high dielectric constant, while the separation factor increased with an increase in the dielectric constant.

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  • 日本金属学会誌

    日本金属学会誌 51 (7), 645-650, 1987

    公益社団法人 日本金属学会

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