Removal of calcium and magnesium from lithium concentrated solution by solvent extraction method using D2EHPA

doi:10.1016/j.desal.2019.114306

	Removal of calcium and magnesium from lithium concentrated solution by solvent extraction method using D2EHPA
	Shi, Dong; Cui, Bin; Li, Lijuan; Xu, Min; Zhang, Yuze; Peng, Xiaowu; Zhang, Licheng; Song, Fugen; Ji, Lianmin
第一作者	Shi, Dong
	2020-04-01
发表期刊	DESALINATION
ISSN	0011-9164
卷号	479
摘要	In this work, a solvent extraction process for Ca2+ and Mg2+ removal from Li+ concentrated solution consisted of 30 g/L Li+, 1.5 g/L Ca2+ and 1.5 g/L Mg2+ was proposed, using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as extractant. The extraction process was a cation exchange mechanism, and the extraction sequence was Ca2+ > Mg2+ > Li+ > Nat Under the optimum condition of 66% saponification degree, 3/2 phase ratio and three-stage extraction, the extraction efficiency of Ca2+, Mg2+ and Li+ reached 99.00%, 98.57% and 15.28%, respectively. The extracted cations could be completely stripped by HCl solution, and the co-extracted Li+ could be selectively stripped and separated from Ca2+ and Mg2+ using higher concentration HCl solution at higher phase ratio. A whole removal process for Ca2+ and Mg2+ involving extraction, scrubbing, stripping and saponification sections was put forward, and the process stability was continuously tested on centrifugal extractors. Removal efficiency of Ca2+ and Mg2+ reached 99.05% and 98.48% respectively. Meanwhile, the loss ratio of Li+ was as low as 5.22%.
DOI	10.1016/j.desal.2019.114306
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/33958
专题	盐湖资源综合利用工程技术中心中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Shi, Dong,Cui, Bin,Li, Lijuan,et al. Removal of calcium and magnesium from lithium concentrated solution by solvent extraction method using D2EHPA[J]. DESALINATION,2020,479.
APA	Shi, Dong.,Cui, Bin.,Li, Lijuan.,Xu, Min.,Zhang, Yuze.,...&Ji, Lianmin.(2020).Removal of calcium and magnesium from lithium concentrated solution by solvent extraction method using D2EHPA.DESALINATION,479.
MLA	Shi, Dong,et al."Removal of calcium and magnesium from lithium concentrated solution by solvent extraction method using D2EHPA".DESALINATION 479(2020).

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