Distribution Behaviors of Light Rare Earths by Di-(2-ethylhexyl) 2-Ethylhexyl Phosphonate in Kerosene under the Action of a Self-Salting-Out Effect

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	Distribution Behaviors of Light Rare Earths by Di-(2-ethylhexyl) 2-Ethylhexyl Phosphonate in Kerosene under the Action of a Self-Salting-Out Effect
	Zhao, Junmei 1; Huo, Fang 1; Pan, Feng 1; Li, Deqian 2; Liu, Huizhou 1
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2014-01-29
卷号	53 期号:4 页码:1598-1605
关键词	solvent-extraction nitric-acid nitrate medium cyanex 272 cerium(iv) lanthanides separation dehehp recovery fluorine(i)
ISSN号	0888-5885
其他题名	Ind. Eng. Chem. Res.
中文摘要	Neutral organophosphates have been used for the extraction and separation of rare earths, usually with the addition of an extra salting-out reagent to achieve the necessary high ionic strength. In this work, we propose a novel approach to extraction from rare earth solutions with fairly high concentrations without an extra salting-out reagent. The distribution behaviors of La, Pr, and Nd in a nitrate solution extracted with di-(2-ethylhexyl) 2-ethylhexyl phosphonate (DEHEHP) in kerosene under the action of a self-salting-out effect were investigated, including the extraction mechanism, extracted species, extraction isotherms, and effects of acidity and temperature. The obtained results show that the extraction species probably is RE(NO3)(3)center dot 1.5DEHEHP according to the slope analysis method and the saturation extraction method. Considering the other coexisting light rare earths, such as Ce and Sm, the separation factors were also examined through a comparison of the two commercial extractants P350 and TBP. The extraction selectivity for DEHEHP under the action of the self-salting-out effect is much higher than that of TBP but just slightly below that of P350. Finally, it can be concluded that the current system using DEHEHP as an extractant under the action of the self-salting-out effect shows good prospects for the purification of La from other light rare earths.
英文摘要	Neutral organophosphates have been used for the extraction and separation of rare earths, usually with the addition of an extra salting-out reagent to achieve the necessary high ionic strength. In this work, we propose a novel approach to extraction from rare earth solutions with fairly high concentrations without an extra salting-out reagent. The distribution behaviors of La, Pr, and Nd in a nitrate solution extracted with di-(2-ethylhexyl) 2-ethylhexyl phosphonate (DEHEHP) in kerosene under the action of a self-salting-out effect were investigated, including the extraction mechanism, extracted species, extraction isotherms, and effects of acidity and temperature. The obtained results show that the extraction species probably is RE(NO3)(3)center dot 1.5DEHEHP according to the slope analysis method and the saturation extraction method. Considering the other coexisting light rare earths, such as Ce and Sm, the separation factors were also examined through a comparison of the two commercial extractants P350 and TBP. The extraction selectivity for DEHEHP under the action of the self-salting-out effect is much higher than that of TBP but just slightly below that of P350. Finally, it can be concluded that the current system using DEHEHP as an extractant under the action of the self-salting-out effect shows good prospects for the purification of La from other light rare earths.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	SOLVENT-EXTRACTION ; NITRIC-ACID ; NITRATE MEDIUM ; CYANEX 272 ; CERIUM(IV) ; LANTHANIDES ; SEPARATION ; DEHEHP ; RECOVERY ; FLUORINE(I)
收录类别	SCI
原文出处	://WOS:000330598800033
语种	英语
WOS记录号	WOS:000330598800033
公开日期	2014-05-06
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/8076]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Junmei,Huo, Fang,Pan, Feng,et al. Distribution Behaviors of Light Rare Earths by Di-(2-ethylhexyl) 2-Ethylhexyl Phosphonate in Kerosene under the Action of a Self-Salting-Out Effect[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(4):1598-1605.
APA	Zhao, Junmei,Huo, Fang,Pan, Feng,Li, Deqian,&Liu, Huizhou.(2014).Distribution Behaviors of Light Rare Earths by Di-(2-ethylhexyl) 2-Ethylhexyl Phosphonate in Kerosene under the Action of a Self-Salting-Out Effect.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(4),1598-1605.
MLA	Zhao, Junmei,et al."Distribution Behaviors of Light Rare Earths by Di-(2-ethylhexyl) 2-Ethylhexyl Phosphonate in Kerosene under the Action of a Self-Salting-Out Effect".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.4(2014):1598-1605.