反萃取条件对支撑液膜法提取有机酸的影响

Effect of the Stripping Conditions on the Separation of Organic Acid by Supported Liquid-membranes

摘要:

采用支撑液膜法分离提取混合液中的有机酸,通过反萃取工艺条件优化,探讨支撑液膜法提取有机酸的可行性。结果表明,由疏水微滤膜组件、萃取剂、有机溶剂和反萃取剂组成的支撑液膜体系可以有效实现有机酸的分离提取。最佳反萃取条件为:提取时间为360 min,反萃取相pH值为9,反萃取剂为NaHCO3,反萃取剂质量浓度为20g/L,浓缩倍数为2.0。支撑液膜可以较好实现混合液中有机酸的同步提取和浓缩。

Abstract:

The subject mainly through optimizing anti-extraction program,study the feasibility of the technology of extracting organic acid from anaerobic acid mixture by supported liquid membranes.The experiments showed the supported liquid membranes system which composed as the following: hydrophobic polypropylene hollow fiber membrane,the extractive solvent,the organic solvent and the anti-extractive solvent can be efficiency extracted organic acid.The best condition in the system is that: extraction reaction time is 360 minters,NaHCO3 in the anti-extraction is 20 g/L,pH is 9,concentrate ratio is 2.0.The technology of extracting and concentrating organic acid from anaerobic acid mixture by supported liquid membranes can be preferably realized.