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Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid
Li, Fujian1,2,3; Yan, Junjun1,4; Zhang, Xiangping1,2; Wang, Na1,4; Dong, Haifeng1,2; Bai, Lu1,2; Gao, Hongshuai1,2
2021-08-04
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume60Issue:30Pages:11241-11250
AbstractAluminum, as an associated metal with rare-earth resources, is a common impurity in rare-earth separation products. In the traditional P507-kerosene-HCl system, tremendous aluminum impurity (8875 mg/L herein) is often enriched in GdCl3 solutions because of the similar extraction sequence during rare-earth separation. In this work, a new amine-group-functionalized ionic liquid (IL) was developed to remove trace aluminum impurity from high-purity GdCl3 solutions, overcoming the drawbacks of strong hydrophilicity and complicated compositions of the organic phase, as well as other impurities introduced and tremendous saline wastewater produced inevitably. Methyltrioctylammonium hydroxide (N1888OH), instead of the water soluble ammonium hydroxide (NH4OH), was used to dissociate the dimer of sec-octylphenoxy acetic acid (CA12) and synthesize cation- and anion-bifunctionalized IL [N1888][CA12]. The separation factor of Al/Gd was as high as 36. The influences of pH, salting-out agent, extraction time, temperature, and stripping efficiency on the extraction efficiency were evaluated. The result showed that high-purity GdCl3 solution was obtained with low aluminum impurity of 10 ppm after five-stage countercurrent extraction. Due to the weak interaction between the metal and IL, very dilute HCl solution (0.07 mol/L) and NaOH solution (0.07 mol/L) were in favor of metal stripping and IL regeneration.
DOI10.1021/acs.iecr.1c00870
Language英语
WOS KeywordRARE-EARTHS ; SOLVENT-EXTRACTION ; SEPARATION ; EFFICIENT ; RECOVERY ; ACID ; STRATEGY
Funding ProjectNational Natural Science Foundation of China[22008244] ; National Natural Science Foundation of China[22078323] ; Key Research Program of Chinese Academy of Sciences[ZDRWCN-2021-3-1-12] ; Special research assistant of CAS ; Innovation Academy for Green Manufacture[IAGM2020DB03]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Special research assistant of CAS ; Innovation Academy for Green Manufacture
WOS IDWOS:000683727000031
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49899
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Xiangping
Affiliation1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, CAS Key Lab Green Proc & Engn, Inst Proc Engn,State Key Lab Multiphase Complex S, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
4.Zhengzhou Univ, Coll Chem & Engn, Zhengzhou 450001, Peoples R China
Recommended Citation
GB/T 7714
Li, Fujian,Yan, Junjun,Zhang, Xiangping,et al. Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2021,60(30):11241-11250.
APA Li, Fujian.,Yan, Junjun.,Zhang, Xiangping.,Wang, Na.,Dong, Haifeng.,...&Gao, Hongshuai.(2021).Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,60(30),11241-11250.
MLA Li, Fujian,et al."Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 60.30(2021):11241-11250.
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