Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash

doi:10.1016/j.cplett.2021.138510

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源综合利用工程技术中心

	Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash
	Rui, Hongming; Zhang, Licheng; Li, Lijuan; Zhu, Lixia
刊名	CHEMICAL PHYSICS LETTERS
	2021-05-16
卷号	771
ISSN号	0009-2614
DOI	10.1016/j.cplett.2021.138510
英文摘要	The present work used solvent extraction method to extract lithium from hydrochloric acid leaching solution of high-alumina coal fly ash. In extraction stage, the optimum conditions were explored, at 20 ? and O/A = 1:4, using 70%(Vol.) tributyl phosphate-30%(Vol.) sulfonated kerosene-0.36 mol/L Fe3+ as extractant, extraction of lithium could reach 99% by two-stage extraction. In scrubbing stage, 95% of Al3+ in loaded organic phase was scrubbed with 6 mol/L HCl at O/A = 40:1, then 97% of Ca2+ in the loaded organic phase was scrubbed by threestage countercurrent scrubbing with 5.5 mol/L LiCl + 0.5 mol/L HCl at O/A = 30:1. In stripping stage, 99% of Li+ in scrubbed organic phase was stripped by five-stage countercurrent stripping with 6 mol/L HCl at O/A = 10:1. In regeneration stage, 2 mol/L NaOH was used as regenerant to remove free acid and exchange H+ of extractive compound. There were no third phase, emulsification and solid deposition during the whole experiment. The structure of extractive compound was determined by slope method, and extracted complex ratio of Li+, Fe3+, and TBP was 1:1:1. The extraction process was found to be exothermic and spontaneous by thermodynamic study.Therefore, it?s a promising method to recover lithium from hydrochloric acid leaching solution of highalumina coal fly ash by TBP-FeCl3-sulfonated kerosene extraction system.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34178]
专题	青海盐湖研究所_盐湖资源综合利用工程技术中心
推荐引用方式 GB/T 7714	Rui, Hongming,Zhang, Licheng,Li, Lijuan,et al. Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash[J]. CHEMICAL PHYSICS LETTERS,2021,771.
APA	Rui, Hongming,Zhang, Licheng,Li, Lijuan,&Zhu, Lixia.(2021).Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash.CHEMICAL PHYSICS LETTERS,771.
MLA	Rui, Hongming,et al."Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash".CHEMICAL PHYSICS LETTERS 771(2021).