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Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by [A336][NO3] using the single drop technique
Wang, Xiaoqin1,2; Huang, Kun1,2; Cao, Wenjuan2,3; Sun, Pan2,3; Song, Weiyuan2,3; Liu, Huizhou2,3
2020-05-01
Source PublicationCHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
Volume28Issue:5Pages:1326-1333
AbstractThe kinetics and the difference for Pr(III) and Nd(III) extraction front nitrate aqueous solution using trialkylmethylammonium nitrate ([A336][NO3) 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 NaNO3 and H+ in aqueous solutions, and the concentrations of [A336][NO3] in 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) with [A336][NO3] was 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) by [A336][NO3] was 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) with [A336][NO3], The ratio of extraction rates of Pr(lII) to Nd(III) with [A336][NO3] was 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) with [A 336][NO3] increased 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) by [A336][NO3] were diffusion controlled, and the reactions obeyed S(N)2 mechanism. The present work highlights a possible approach to strengthen the kinetic separation of Pr(III) and Nd(III). (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
KeywordPraseodymium Neodymium [A336][NO3] Kinetics Single drop technique
DOI10.1016/j.cjche.2020.02.010
Language英语
WOS KeywordBIFUNCTIONAL IONIC LIQUID ; SOLVENT-EXTRACTION ; CHLORIDE MEDIUM ; NONEQUILIBRIUM EXTRACTION ; SELECTIVE EXTRACTION ; ACID ; SEPARATION ; MECHANISM ; KEROSENE ; COMPLEX
Funding ProjectNational Natural Science Foundation of China[51574213] ; National Natural Science Foundation of China[51074150] ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)[2012CBA01203]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)
WOS IDWOS:000555486000015
PublisherCHEMICAL INDUSTRY PRESS CO LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/41601
Collection中国科学院过程工程研究所
Corresponding AuthorHuang, Kun
Affiliation1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiaoqin,Huang, Kun,Cao, Wenjuan,et al. Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by [A336][NO3] using the single drop technique[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2020,28(5):1326-1333.
APA Wang, Xiaoqin,Huang, Kun,Cao, Wenjuan,Sun, Pan,Song, Weiyuan,&Liu, Huizhou.(2020).Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by [A336][NO3] using the single drop technique.CHINESE JOURNAL OF CHEMICAL ENGINEERING,28(5),1326-1333.
MLA Wang, Xiaoqin,et al."Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by [A336][NO3] using the single drop technique".CHINESE JOURNAL OF CHEMICAL ENGINEERING 28.5(2020):1326-1333.
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