Extracting Li+ from high Na/Li solution and comparing the affinity of nonylphenol oxygen anion to Na+ and Li+

被引:13
作者
Zhao, Ruzhen [1 ,2 ]
Ying, Ziwen [1 ,2 ]
Sun, Hao [1 ,2 ]
Wei, Qifeng [1 ,2 ]
Ren, Xiulian [1 ,2 ]
机构
[1] Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150000, Peoples R China
[2] Harbin Inst Technol Weihai, Sch Marine Sci & Technol, Weihai 264200, Peoples R China
关键词
Solvent extraction; Saponification; Lithium extraction; High Na; Li ratio; Separation; ELECTRONIC POPULATION ANALYSIS; MOLECULAR WAVE FUNCTIONS; LITHIUM; GEOMETRY; OVERLAP;
D O I
10.1016/j.seppur.2023.124189
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Lithium extraction has become a hot topic because of global efforts to control carbon emissions. However, the efficient separation of Li/Na is a great challenge. In this study, the lithium carbonate precipitation mother liquor with Li+ content of 1.7910 g/L and Na+ content of 111.2438 g/L was used as the raw material solution. Due to its high Na/Li ratio, we found that the affinity of nonylphenol oxygen anion with Li+ is stronger than that with Na+ through quantum chemical analysis. And through the optimization of the effects of saponification degree, pH, temperature, and phase ratio, after twelve rounds of a five-stage countercurrent extraction, the ELi (%) reached 99% and the maximum & beta;Li/Na reached 114799.73. After scrubbing with 0.5 mol/L HCl + 0.5 g/L LiCl solution and stripping with 2 mol/L HCl solution, Li+ and Na+ could be effectively separated. This study proved that nonylphenol oxygen anion had a significant effect on the extraction of Li+, and could effectively separate Li+ from Na+, which brings a new idea for the treatment of high Na/Li solution.
引用
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页数:10
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