脂肪酸-聚醚胺-CO_(2)相行为及萃取性能研究  

Study on the phase behaviors fatty acid-polyether amine-carbon dioxide complex solvent and its extracting ability

作　　者：韩桂强 李敏 李甜 孟祥浩 冯树波[1] HAN Guiqiang;LI Min;LI Tian;MENG Xianghao;FENG Shubo(College of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050018

出　　处：《化学工业与工程》2022年第6期62-68,共7页Chemical Industry and Engineering

摘　　要：研究了脂肪酸-聚醚胺-水络合溶剂在CO_(2)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CO_(2)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CO_(2)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%。The CO_(2)-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 CO_(2)-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 CO_(2)-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%.

关 键 词：脂肪酸 聚醚胺 CO_(2)响应性 低共熔溶剂 均相萃取 非均相分离 铜离子 

分 类 号：TQ028.32[化学工程] TQ413[环境科学与工程—环境工程] X701