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题名:
Salting-out induced three-liquid-phase separation of Pt(IV), Pd(II) and Rh(III) in system of S201-acetonitrile-NaCl-water
作者: Zhang, Chao1,2; Huang, Kun1; Yu, Pinhua1,2; Liu, Huizhou1
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
出版日期: 2011-07-12
卷号: 80, 期号:1, 页码:81-89
关键词: Acetonitrile ; Three-liquid-phase extraction (TLPE) ; PGMs ; Salting-out ; Microheterogeneity
收录类别: SCI
WOS记录号: WOS:000292857300011
DOI: 10.1016/j.seppur.2011.04.011
通讯作者: Huang, K
文章类型: Article
英文摘要: Salting-out induced three-liquid-phase system (TLPS) of diisopentyl sulfide (S201)-acetonitrile-NaCl-water was explored to extract and separate platinum, palladium and rhodium with one-step method. The influences of phase-forming behaviors of TLPS on partition of platinum-group metal (PGM) ions were investigated by changing the phase-forming salt and its concentration, HCl concentration in equilibrating salt aqueous phases and the initial volume ratio of acetonitrile to aqueous NaCl solution. Experimental results indicated Pd(II), Pt(IV) and Rh(III) were selectively concentrated into the 5201 organic top phase, acetonitrile-rich middle phase and NaCl aqueous bottom phase respectively. The three-liquid-phase partition of platinum metal ions occurred with the salting-out induced two-phase splitting of acetonitrile-water mixtures. A micro-mechanism model is proposed to explain the influence of salting-out induced phase splitting behavior of three-liquid-phase system on mass transfer of PGM ions. Appearance of microscopic molecular aggregates accounts for the micro-phase enrichment of platinum metal ions. The competition of two opposite processes, salting-out induced dehydration of acetonitrile molecules in aqueous solutions while strong re-hydration of salting-out acetonitrile molecules in separated acetonitrile-rich phase, plays an important role in affecting the phase-forming behaviors and three-liquid-phase mass transfer of different platinum metal ions. (C) 2011 Elsevier B.V. All rights reserved.
WOS标题词: Science & Technology ; Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
关键词[WOS]: WATER-ACETONITRILE MIXTURES ; AQUEOUS BIPHASIC SYSTEMS ; INDUCED PHASE-SEPARATION ; PLATINUM-GROUP METALS ; EXTRACTION SYSTEMS ; POLYETHYLENE-GLYCOL ; SOLVATION ; PALLADIUM ; PYRIDINECARBOXAMIDES ; FERMENTATION
语种: 英语
ISSN号: 1383-5866
Citation statistics:
内容类型: 期刊论文
版本: 出版稿
URI标识: http://ir.ipe.ac.cn/handle/122111/4693
Appears in Collections:湿法冶金清洁生产技术国家工程实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Chao,Huang, Kun,Yu, Pinhua,et al. Salting-out induced three-liquid-phase separation of Pt(IV), Pd(II) and Rh(III) in system of S201-acetonitrile-NaCl-water[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2011,80(1):81-89.
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