Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by A336NO_3 using the single drop technique

CAS OpenIR

	Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by A336NO_3 using the single drop technique
	Xiaoqin Wang 1; Kun Huang 1; Wenjuan Cao 2; Pan Sun 2; Weiyuan Song 2; Huizhou Liu 2
	2020
Source Publication	中国化学工程学报:英文版
ISSN	1004-9541
Volume	28.0 Issue:005 Pages:1326
Abstract	The kinetics and the difference for Pr(Ⅲ)and Nd(Ⅲ)extraction from nitrate aqueous solution using trialkylmethylammonium nitrate(A336NO3)as extractant were investigated by the single drop technique.The dependence of the extraction rate of Pr(Ⅲ)and Nd(Ⅲ)on the concentrations of free Pr(Ⅲ)and Nd(Ⅲ)ions,the concentrations of Na NO3 and H+in aqueous solutions,and the concentrations ofA336NO3in kerosene solutions were discussed and the corresponding extraction rate equations for Pr(Ⅲ)and Nd(Ⅲ)were obtained.These equations demonstrated that the reaction rate constant of Pr(Ⅲ)withA336NO3was double than that of Nd(Ⅲ).The effect of the addition of diethylenetriaminepentaacetic acid(DTPA)on the difference in the extraction rate of Pr(Ⅲ)and Nd(Ⅲ)byA336NO3was also investigated.It was revealed that the difference in the complex formation rates of Pr(Ⅲ)and Nd(Ⅲ)with DTPA made a significant impact on the difference in the extraction rates of Pr(Ⅲ)and Nd(Ⅲ)withA336NO3.The ratio of extraction rates of Pr(Ⅲ)to Nd(Ⅲ)withA336NO3was in proportion to the ratio of complex formation rates of Pr(Ⅲ)to Nd(Ⅲ)with DTPA.The extraction rate difference for Pr(Ⅲ)and Nd(Ⅲ)withA336NO3increased due to a higher complex formation rate constant of DTPA with the free and un-complexed Nd(Ⅲ)ions in the aqueous nitrate solution than that with Pr(Ⅲ)ions.Therefore,the addition of DTPA in the aqueous nitrate solution is an effective method to intensify the separation of Pr(Ⅲ)and Nd(Ⅲ)in kinetics.The study on the extraction mechanism indicated that both the extraction of Pr(Ⅲ)and Nd(Ⅲ)byA336NO3were diffusion controlled,and the reactions obeyed SN2 mechanism.The present work highlights a possible approach to strengthen the kinetic separation of Pr(Ⅲ)and Nd(Ⅲ).
Keyword	Praseodymium Neodymium A336NO3 Kinetics Single drop technique
Language	英语
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/47471
Collection	中国科学院过程工程研究所
Affiliation	1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing 2.CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences 3.中国科学院大学
Recommended Citation GB/T 7714	Xiaoqin Wang,Kun Huang,Wenjuan Cao,et al. Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by A336NO_3 using the single drop technique[J]. 中国化学工程学报:英文版,2020,28.0(005):1326.
APA	Xiaoqin Wang,Kun Huang,Wenjuan Cao,Pan Sun,Weiyuan Song,&Huizhou Liu.(2020).Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by A336NO_3 using the single drop technique.中国化学工程学报:英文版,28.0(005),1326.
MLA	Xiaoqin Wang,et al."Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by A336NO_3 using the single drop technique".中国化学工程学报:英文版 28.0.005(2020):1326.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院过程工程研究所机构知识库