脂肪酸-聚醚胺-CO<sub>2</sub>相行为及萃取性能研究

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摘要研究了脂肪酸-聚醚胺-水络合溶剂在CO₂触发开关作用下的相分离行为、开关性能及萃取水溶液中铜离子效能。通过辛酸-癸酸、辛酸-月桂酸、癸酸-月桂酸3种憎水性低共熔溶剂DES和辛酸、癸酸与聚醚胺D230水溶液配伍构建了系列开关型溶剂，并考察了不同脂肪酸与不同浓度聚醚胺D230水溶液配伍形成均相溶液的CO₂响应性能。实验发现，聚醚胺D230水溶液质量分数为10%、13%和15%时，极性逆转导致体系的相行为变化有所不同。借助脂肪酸-聚醚胺-水络合溶剂，实现了脂肪酸DES均相萃取水溶液中铜离子以及与水相的非均相分离萃取模式。实验结果表明，质量分数10%聚醚胺D230水溶液与脂肪酸组合具有良好的CO₂开关相行为，癸酸-月桂酸DES萃取铜离子的效果最佳。实验表明铜离子萃取率达到92.7%。

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	韩桂强
	李敏
	李甜
	孟祥浩
	冯树波

关键词：脂肪酸聚醚胺 CO₂响应性低共熔溶剂均相萃取非均相分离铜离子

Abstract： The CO₂-triggered phase separation behaviors,switching performance and efficiency of extracting copper ions from aqueous solutions for fatty acid-polyetheramide-water complex solvents were investigated. A series of switchable solvents were constructed by pairing three types of hydrophobic low eutectic solvents DES,caprylic acid-decanoic acid,capric acid-lauric acid and decanoic acid-lauric acid with polyetheramine D230 aqueous solution. The CO₂-triggered response performance of different fatty acids with different concentrations of polyetheramine D230 aqueous solution to form homogeneous solutions was investigated,respectively. It was found that the shuttling back and forth of the polarity of the complex solvents exhibited different phase behaviors for 10%,13% and 15% aqueous polyetheramine D230 solutions. With the aid of a fatty acid-polyetheramine-water complex solvent,an extraction mode was achieved for the homogeneous extraction of copper ions from aqueous solutions by fatty acid DES and afterward the heterogeneous separation from the aqueous phase. The experimental results showed that the combination of 10% polyetheramine D230 aqueous solution with fatty acids had good CO₂-switching phase behaviour and the capric acid-lauric acid DES exhibited a best performance of extracting copper ions. The extraction ratio of copper ions reached 92.7%.

Keywords： fatty acid polyether amine CO₂ responsiveness hydrophobic deep eutectic solvent homogeneous phase extraction heterogeneous phase separation copper ions

Received 2021-11-05;

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Corresponding Authors: 冯树波,教授,E-mail:fengsb@263.net。 Email: fengsb@263.net

About author: 韩桂强(1994-),男,硕士研究生,现从事清洁能源与绿色化工研究。

引用本文:

韩桂强, 李敏, 李甜, 孟祥浩, 冯树波.脂肪酸-聚醚胺-CO₂相行为及萃取性能研究[J]. 化学工业与工程, 2022,39(6): 62-68

HAN Guiqiang, LI Min, LI Tian, MENG Xianghao, FENG Shubo.Study on the phase behaviors fatty acid-polyether amine-carbon dioxide complex solvent and its extracting ability[J]. Chemcial Industry and Engineering, 2022,39(6): 62-68

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