摘要
研究和探讨柠檬酸提取的化学过程,论述了反萃取剂Na2CO3与溶质柠檬酸的最终化学计量比并非是化学反应比3∶2而是1∶1,甚至更低,也就是说,在反萃取相中不仅存在C6H5O73-,而且存在HC6H5O72-或H2C6H5O7-.提高反萃取剂的浓度对溶质提取有利.为深入研究该技术提供了理论依据.
The transfer mass process of citric acid extraction by supported liquid membrane （SLM） is discussed through experiment. The actual stoicheiometrical ratio of chemical reaction between stripping agent Na2CO3 and solute citric acid is not 3 ： 2 but 1 ： 1 or less, that is, there exits not only C6H507^3- but also HC6H5O7^2- or H2C6H5O7^- in strip phase. Besides, raising concentration of stripping agent Na2CO3 can facilitate citric acid transfer. The results provide theoretical basis for further application of SLM.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2007年第5期5-7,12,共4页
Membrane Science and Technology
关键词
支撑液膜
柠檬酸
传质机理
supported liquid membrane（SLM）
citric acid
transfer mass mechanism
