Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid

doi:10.1021/acs.iecr.1c00870

	Removal of Trace Aluminum Impurity for High-Purity GdCl3 Preparation using an Amine-Group-Functionalized Ionic Liquid
	Li, Fujian 1,2,3; Yan, Junjun 1,4; Zhang, Xiangping 1,2; Wang, Na 1,4; Dong, Haifeng 1,2; Bai, Lu 1,2; Gao, Hongshuai 1,2
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2021-08-04
卷号	60 期号:30 页码:11241-11250
ISSN号	0888-5885
DOI	10.1021/acs.iecr.1c00870
英文摘要	Aluminum, 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.
资助项目	National 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关键词	RARE-EARTHS ; SOLVENT-EXTRACTION ; SEPARATION ; EFFICIENT ; RECOVERY ; ACID ; STRATEGY
WOS研究方向	Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000683727000031
资助机构	National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Special research assistant of CAS ; Innovation Academy for Green Manufacture
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49898]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Xiangping
作者单位	1.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
推荐引用方式 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.