三辛基胺(TOA)和三(2-乙基己基)胺(TEHA)在硫酸溶剂萃取中的比较*

IF 1.8 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Solvent Extraction and Ion Exchange Pub Date : 2023-06-21 DOI:10.1080/07366299.2023.2225067
A. Heidari, S. Shahini, Davoud Haghshenas Fatmehsari, E. Keshavarz Alamdari
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引用次数: 0

摘要

摘要研究了三辛基胺(TOA)和三(2-乙基己基)胺(TEHA)两种胺在硫酸萃取体系中的行为,考察了不同浓度的萃取剂和改性剂以及硫酸萃取温度。研究发现,TOA对硫酸的萃取能力较高,对温度的依赖性较小。然而,当使用TOA时,初始硫酸浓度的增加导致酸提取百分比的下降,而在TEHA的情况下没有观察到这种下降。该研究还说明了使用辛醇作为改性剂的必要性,TOA和TEHA需要不同的最低水平。此外,辛醇对TEHA–H2SO4萃取系统中硫酸的萃取水平有积极影响,这可以被认为是容易汽提负载有机相的优势。斜率分析法表明,提取1摩尔硫酸需要超过1摩尔的TOA,而1摩尔的TEHA可以吸收2摩尔的硫酸。FTIR光谱分析证实了TOA参与硫酸的提取,并提供了对所形成化学键的深入了解。总的来说,该研究提供了对硫酸溶剂萃取的全面了解,并有助于优化工业应用的萃取工艺。
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A Comparison Between Trioctylamine (TOA) and Tris(2-Ethylhexyl) Amine (TEHA) in Solvent Extraction of Sulfuric Acid*
ABSTRACT The study investigated the behavior of two amines, Trioctylamine (TOA) and Tris(2-Ethylhexyl) amine (TEHA), in the sulfuric acid extraction system, with varying concentrations of extractants and modifiers, as well as the temperature of the sulfuric acid extraction. The study found that TOA had a higher ability in the extraction of sulfuric acid and was less dependent on temperature. However, an increase in the initial sulfuric acid concentration resulted in a drop in acid extraction percentage when TOA was employed, while such a drop was not observed in the case of TEHA. The study also illustrated the necessity of using Octanol as a modifier, with different minimum levels required for TOA and TEHA. Additionally, Octanol showed a positive effect on the extraction level of sulfuric acid in the TEHA – H2SO4 extraction system, which can be considered an advantage in the facile stripping of the loaded organic phase. The slope analysis method revealed that more than 1 mol of TOA is necessary to extract 1 mol of sulfuric acid, while 1 mol of TEHA can absorb 2 mol of sulfuric acid. FTIR spectra analysis confirmed TOA's participation in the extraction of sulfuric acid and provided insights into the chemical bonds formed. Overall, the study provides a comprehensive understanding of the solvent extraction of sulfuric acid and can be useful in optimizing the extraction process for industrial applications.
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来源期刊
CiteScore
4.40
自引率
5.00%
发文量
15
审稿时长
8.4 months
期刊介绍: Solvent Extraction and Ion Exchange is an international journal that publishes original research papers, reviews, and notes that address all aspects of solvent extraction, ion exchange, and closely related methods involving, for example, liquid membranes, extraction chromatography, supercritical fluids, ionic liquids, microfluidics, and adsorption. We welcome submissions that look at: The underlying principles in solvent extraction and ion exchange; Solvent extraction and ion exchange process development; New materials or reagents, their syntheses and properties; Computational methods of molecular design and simulation; Advances in equipment, fluid dynamics, and engineering; Interfacial phenomena, kinetics, and coalescence; Spectroscopic and diffraction analysis of structure and dynamics; Host-guest chemistry, ion receptors, and molecular recognition.
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