3-羟基丙酸稀溶液的络合萃取

发布时间：2018-04-22 03:41

  本文选题：络合萃取 + -羟基丙酸　； 参考：《过程工程学报》2017年06期

【摘要】：以三辛胺为萃取剂,分别用正辛醇、二氯甲烷、乙酸乙酯、4-甲基-2-戊酮、正己烷、环己烷为稀释剂对3-羟基丙酸稀溶液进行络合萃取,分析了稀释剂对萃取的影响,讨论了温度、溶液p H、相比及络合剂体积分数对络合萃取相平衡分配系数的影响,利用傅立叶红外光谱仪测定了负载有机相中萃合物的结构,对三辛胺络合萃取3-羟基丙酸的机理进行了探讨.结果表明,正辛醇作稀释剂萃取效果最好,平衡分配系数高达4.46.以Na OH溶液进行反萃,3-羟基丙酸的反萃率为99.6%.
[Abstract]:Trioctylamine was used as extractant to extract 3-hydroxypropionic acid dilute solution with n-octanol, dichloromethane, ethyl acetate 4-methyl-2-pentanone, n-hexane and cyclohexane, respectively. The effects of temperature, solution pH, ratio and the volume fraction of complexing agent on the equilibrium partition coefficient of complexation extraction phase were discussed. The structure of the extractant in the loaded organic phase was determined by Fourier transform infrared spectroscopy (FTIR). The mechanism of complex extraction of 3-hydroxypropionic acid by trioctylamine was discussed. The results showed that the extraction efficiency of n-octanol as diluent was the best, and the equilibrium partition coefficient was as high as 4.46. The stripping rate of 3-hydroxypropionic acid from NaOH solution is 99.6.
【作者单位】： 中国科学院过程工程研究所绿色过程与工程重点实验室;中国科学院大学化学与化工学院;中国科学院青岛生物能源与过程研究所;
【基金】：山东泰山学者攀登计划资助项目(编号:tspd20150210) 国家自然科学基金资助项目(编号:21506221,21676283)
【分类号】：TQ028.32
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本文编号：1785472