Toward mechanistic understanding of highly extraction efficiency for boron from Salt Lake brine: kinetics, mass transfer, and modeling

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-03-27 DOI:10.1002/jctb.7852

Yajing Wang, Jisheng Li, Caixiong Quan, Shiying Di, Siqi Jiang, Zhiyuan Wang, Ningning Wang, Jiahui Zhang, Xin Guo, Yufeng Hu

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引用次数: 0

Abstract

BACKGROUND

The kinetic study of boron extraction from Salt Lake brine is the essence and mechanism of solvent extraction process. A thorough understanding of the kinetic competition between desired Ionic liquid (IL)-isooctyl alcohol (2-EH) extraction processes and any detrimental diffusion resistance is required to achieve high extraction efficiency of boron in Salt Lake brine.

RESULTS

The extraction experiments of boron from Salt Lake brine with highly extraction efficiency (93.6%) in 3-dodecyl-1-methylimidazolium hydrogen sulfate ([C₁₂mim][HSO₄])-2-EH extraction system was performed in a constant interfacial area stirred Lewis cell. The work uniquely employs a laminar constant interface surface cell as the research object, offering a more precise measurement of the extraction kinetics compared to traditional methods. Furthermore, the impacts of key parameters such as extraction temperature, stirring speed, phase interface area, and the initial concentrations of boron [C₁₂mim][HSO₄] and 2-EH were thoroughly examined, revealing their significant influence on extraction efficiency.

CONCLUSION

The results showed that the extraction process mainly occurred in the two-phase interfacial region and was controlled by aqueous diffusion reaction. The activation energy was determined to be about 23.90 kJ·mol⁻¹. Meanwhile, thermodynamic parameters (ΔH, ΔS, and ΔG) revealed that the extraction of boron was an endothermic and non-spontaneous process. According to data analysis, boron extraction is approximately first-order, and a novel rate equation and extraction mechanism are proposed. The results will provide referential values for the development of more efficient separation processes. © 2025 Society of Chemical Industry (SCI).

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盐湖卤水中硼高萃取效率的机理研究：动力学、传质和建模

盐湖卤水萃取硼的动力学研究是溶剂萃取工艺的实质和机理。为了提高盐湖卤水中硼的萃取效率，需要深入了解离子液体(IL)-异辛醇（2-EH）萃取工艺之间的动力学竞争和任何有害的扩散阻力。结果采用3-十二烷基-1-甲基咪唑硫酸氢([C12mim][HSO4])-2-EH萃取体系在恒界面搅拌Lewis池中萃取盐湖卤水中的硼，萃取效率高达93.6%。这项工作独特地采用层流恒定界面表面细胞作为研究对象，与传统方法相比，提供了更精确的提取动力学测量。进一步考察了萃取温度、搅拌速度、相界面面积、硼[C12mim][HSO4]和2-EH初始浓度等关键参数对萃取效率的影响，揭示了它们对萃取效率的显著影响。结论萃取过程主要发生在两相界面区，受水扩散反应控制。经测定，其活化能约为23.90 kJ·mol−1。同时热力学参数（ΔH， ΔS， ΔG）表明硼的提取是一个吸热非自发过程。根据数据分析，硼的萃取近似为一阶，并提出了新的萃取速率方程和萃取机理。研究结果将为开发更高效的分离工艺提供参考价值。©2025化学工业学会（SCI）。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.