气候变化领域集成服务门户(CCPortal): Ionic liquid for selective extraction of lithium ions from Tibetan salt lake brine with high Na/Li ratio

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DOI	10.1016/j.desal.2023.117274
	Ionic liquid for selective extraction of lithium ions from Tibetan salt lake brine with high Na/Li ratio
	Li, Rujie; Wang, Yangyang; Chen, Linli; Duan, Wenjing; Ren, Zhongqi; Zhou, Zhiyong
发表日期	2024
ISSN	0011-9164
EISSN	1873-4464
卷号	574
英文摘要	beta-Diketones are often used to separate brine with a high sodium-to-lithium ratio but cannot be widely used because of their high toxicity and water solubility. In this work, a functionalized ionic liquid was synthesized from 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 1-hexyl-3-methylimidazolium chloride, which was verified by FT-IR and 1H NMR spectroscopy. An organic phase system was formed with this ionic liquid as the extractant and 2-octanone as the diluent, which had the advantage of achieving good extraction and separation performances without co-extractant. In addition, the brine used in this work is the real Chaka salt lake brine in Tibet, which provides a reference value for industrial application of separation of metal ions. The experimental conditions were optimized and the single-stage extraction efficiency of Li+ reached up to 94 %. Using LiCl solution and HCl as the washing and stripping reagents, the washing efficiency of Na+ and stripping efficiency of Li+ were above 98 % and 99 %, respectively. The raffinate was used to regenerate the organic phase, which reduced the use of alkaline reagents. Over 10 cycles of the extraction process, the extraction efficiency of Li+ maintained at approximately 86 %. The extraction mechanism was identified as ionic association using slope analysis and ultraviolet and infrared measurements.
关键词	Liquid -liquid extraction Ionic liquid Sodium -lithium ratio Tibetan brine Extraction efficiency
英文关键词	SOLVENT-EXTRACTION; METAL-IONS; SEPARATION; SODIUM; MAGNESIUM; PHOSPHATE; RECOVERY; REMOVAL
WOS研究方向	Engineering, Chemical ; Water Resources
WOS记录号	WOS:001156132100001
来源期刊	DESALINATION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283698
作者单位	Beijing University of Chemical Technology
推荐引用方式 GB/T 7714	Li, Rujie,Wang, Yangyang,Chen, Linli,et al. Ionic liquid for selective extraction of lithium ions from Tibetan salt lake brine with high Na/Li ratio[J],2024,574.
APA	Li, Rujie,Wang, Yangyang,Chen, Linli,Duan, Wenjing,Ren, Zhongqi,&Zhou, Zhiyong.(2024).Ionic liquid for selective extraction of lithium ions from Tibetan salt lake brine with high Na/Li ratio.DESALINATION,574.
MLA	Li, Rujie,et al."Ionic liquid for selective extraction of lithium ions from Tibetan salt lake brine with high Na/Li ratio".DESALINATION 574(2024).