Separation of citric and lactic acids in aqueous solutions by solvent extraction and liquid membrane processes

被引：65
|
作者：
Juang, RS
Huang, RH
Wu, RT
机构：
[1] Department of Chemical Engineering, Yuan-Ze University, Nei-Li
来源：
JOURNAL OF MEMBRANE SCIENCE | 1997年 / 136卷 / 1-2期
关键词：
separation; citric acid; lactic acid; solvent extraction; supported liquid membranes; tri-n-octylamine;
D O I：
10.1016/S0376-7388(97)00176-2
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The use of solvent extraction (SX) and supported liquid membrane (SLM) for the separation of citric and lactic acids in aqueous solutions were studied. Experiments were carried out as a function of the total acid concentration, the concentration ratio of the acids, and the concentration of extractant tri-n-octylamine (TOA). In SLM systems, the effects of temperature and strip-phase composition were also examined. It was shown that the equilibrium distribution of SX of each acid was greatly affected in the presence of the other. In addition, the competitive transport of the acids in SLM was explained from the kinetics of SX. Separation factors based on SX distribution and SLM transport were defined and used to optimize conditions for effective separation.
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页码：89 / 99
页数：11
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