Extraction and separation of molybdenum and vanadium using bis(2-ethylhexyl)monothiophosphoric acid and bis(2-ethylhexyl)phosphoric acid.
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- Hirai Takayuki
- Department of Chemical Engineering, Osaka University
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- Hashimoto Takuji
- Department of Chemical Engineering, Osaka University
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- Tsuboi Izumi
- Department of Chemical Engineering, Osaka University
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- Hino Akira
- Department of Chemical Engineering, Osaka University
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- Komasawa Isao
- Department of Chemical Engineering, Osaka University
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The extraction of molybdenum and vanadium from weak-acidic sulfate and chloride media by bis(2-ethylhexyl)monothiophosphoric acid (D2EHTPA) and bis(2-ethylhexyl)phosphoric acid (D2EHPA) was investigated. The cationic species of the metals, such as MoO22+, were extracted by both extractants. In the case of vanadium, the supplied VO3– was reduced to VO2+ by contact with the organic phase containing D2EHTPA, and this extractant was partially oxidized to disulfide. While molybdenum was found to be more extractable than vanadium by both extractants, the separation factor of the metals by using D2EHTPA was greater than in the case using D2EHPA, especially when VO3– was used as feed. The oxidized D2EHTPA containing disulfide enhanced the extractability of molybdenum and vanadium. However, the separation factor of the metals decreased with the formation of disulfide. It is important to reduce V(V) to VO2+ prior to extraction in order to minimize the oxidation of D2EHTPA for separation and repeated use of the extractant.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 28 (1), 85-90, 1995
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204565451904
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- NII論文ID
- 130000021226
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- NII書誌ID
- AA00709658
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- COI
- 1:CAS:528:DyaK2MXktFWgt7Y%3D
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- ISSN
- 18811299
- 00219592
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可