Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6658972 | Hydrometallurgy | 2018 | 7 Pages |
Abstract
A systematic investigation was conducted on the extraction of boric acid from salt lake brine using 2-butyl-1-n-octanol dissolved in sulfonated kerosene. The extraction parameters, including the concentration of extractant, phase ratio and pH value of the brine, were optimized. The salting-out effects of the extraction process were investigated in the presence of AlCl3, MgCl2 and NaCl, and an empirical equation was subsequently proposed. The positive salting-out effects were observed on the extraction of boric acid in the order of AlCl3â¯>â¯MgCl2â¯>â¯NaCl. Thermodynamic modeling results indicate that the extraction process is exothermic. To evaluate the feasibility of the process, a multi-stage countercurrent extraction and stripping process was performed under the optimized operating conditions. The results showed an overall boric acid extraction efficiency of 99.35% and a stripping efficiency of 99.63%, and the overall boric acid recovery and the purity of the stripping solution both exceeded 98%. The results of this study reveal a potential industrial application of the boric acid extraction process.
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Authors
Xiaowu Peng, Lijuan Li, Dong Shi, Licheng Zhang, Huifang Li, Feng Nie, Fugen Song,