Enhancing separation of titanium and iron by three-liquid-phase extraction with 1,10-phenanthroline as additive

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	Enhancing separation of titanium and iron by three-liquid-phase extraction with 1,10-phenanthroline as additive
	Xie, Keng 1,2,3; Huang, Kun 1; Yang, Liangrong 1; Liu, Huizhou 1
刊名	JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
	2012-07-01
卷号	87 期号:7 页码:955-960
关键词	three-liquid-phase extraction 1 10-phenanthroline separation of titanium and iron from magnesium complexation hydrogen-bonding interaction
ISSN号	0268-2575
其他题名	J. Chem. Technol. Biotechnol.
中文摘要	BACKGROUND: A three-liquid-phase system (TLPS) composed of an organic solvent-rich top phase, a polymer-rich middle phase and a salt-rich bottom phase is a newly emerging separation medium. Due to low affinity of the polymer-rich phase for metals it is necessary and important to search for a suitable complexing agent that has a definite affinity for the polymer-rich middle phase and a high selectivity for the metal ion of interest. RESULTS: Addition of 1,10-phenanthroline (phen) is effective in enhancing the separation of titanium and iron from magnesium in the TLPS consisting of trialkylphosphine oxide (TRPO)-PEG 2000-(NH4)2SO4. Hydrogen-bonding interactions between PEG 2000 and phen molecules are the driving force for anchoring tri(phen)-iron(II) sulfate complexes in the middle phase. Under the conditions (pH = 1.5, molar ratio of phen to iron(II) = 3.4:1), nearly 86% of titanium was extracted into the top phase while 100% of iron(II) was distributed in the middle phase, without any interference between the metal species. The separation factor of titanium and iron in the upper two phases was greater than 20 000. CONCLUSIONS: A single step of extraction and separation of titanium and iron from magnesium was realized in the TRPO-PEG 2000-(NH4)2SO4 TLPS with phen as additive. It highlights the effectiveness of TLPS in dealing with multi-metal solutions and suggests a potential use of TLPS in the separation of iron and other target metals. As iron is ubiquitous the separation of iron is often needed in both analytical processes and the hydrometallurgical industry. Copyright (c) 2012 Society of Chemical Industry
英文摘要	BACKGROUND: A three-liquid-phase system (TLPS) composed of an organic solvent-rich top phase, a polymer-rich middle phase and a salt-rich bottom phase is a newly emerging separation medium. Due to low affinity of the polymer-rich phase for metals it is necessary and important to search for a suitable complexing agent that has a definite affinity for the polymer-rich middle phase and a high selectivity for the metal ion of interest. RESULTS: Addition of 1,10-phenanthroline (phen) is effective in enhancing the separation of titanium and iron from magnesium in the TLPS consisting of trialkylphosphine oxide (TRPO)-PEG 2000-(NH4)2SO4. Hydrogen-bonding interactions between PEG 2000 and phen molecules are the driving force for anchoring tri(phen)-iron(II) sulfate complexes in the middle phase. Under the conditions (pH = 1.5, molar ratio of phen to iron(II) = 3.4:1), nearly 86% of titanium was extracted into the top phase while 100% of iron(II) was distributed in the middle phase, without any interference between the metal species. The separation factor of titanium and iron in the upper two phases was greater than 20 000. CONCLUSIONS: A single step of extraction and separation of titanium and iron from magnesium was realized in the TRPO-PEG 2000-(NH4)2SO4 TLPS with phen as additive. It highlights the effectiveness of TLPS in dealing with multi-metal solutions and suggests a potential use of TLPS in the separation of iron and other target metals. As iron is ubiquitous the separation of iron is often needed in both analytical processes and the hydrometallurgical industry. Copyright (c) 2012 Society of Chemical Industry
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences ; Technology
类目[WOS]	Biotechnology & Applied Microbiology ; Chemistry, Multidisciplinary ; Engineering, Chemical
研究领域[WOS]	Biotechnology & Applied Microbiology ; Chemistry ; Engineering
关键词[WOS]	AQUEOUS BIPHASIC SYSTEMS ; PARTITIONING BEHAVIOR ; 2-PHASE SYSTEMS ; WASTE-WATER ; IONS ; FE(III) ; TI(IV) ; CATIONS ; MG(II) ; ACID
收录类别	SCI
原文出处	://WOS:000305061200012
语种	英语
WOS记录号	WOS:000305061200012
公开日期	2013-11-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6327]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xie, Keng,Huang, Kun,Yang, Liangrong,et al. Enhancing separation of titanium and iron by three-liquid-phase extraction with 1,10-phenanthroline as additive[J]. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,2012,87(7):955-960.
APA	Xie, Keng,Huang, Kun,Yang, Liangrong,&Liu, Huizhou.(2012).Enhancing separation of titanium and iron by three-liquid-phase extraction with 1,10-phenanthroline as additive.JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,87(7),955-960.
MLA	Xie, Keng,et al."Enhancing separation of titanium and iron by three-liquid-phase extraction with 1,10-phenanthroline as additive".JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY 87.7(2012):955-960.