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

doi:10.1016/j.cplett.2021.138510

	Solvent extraction of lithium from hydrochloric acid leaching solution of high-alumina coal fly ash
	Rui, Hongming; Zhang, Licheng; Li, Lijuan; Zhu, Lixia
第一作者	Rui, Hongming
	2021-05-16
发表期刊	CHEMICAL PHYSICS LETTERS
ISSN	0009-2614
卷号	771
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.
DOI	10.1016/j.cplett.2021.138510
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34178
专题	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).