Isolation and purification of glycyrrhizic acid with solvent extraction

Solvent extraction of glycyrrhizic acid (GA) from liquorice leaching solution was studied with tributyl phosphate, trialkylphosphine oxide, n-hexanol and 2-ethyl-hexanol as extractants. The results showed that GA was easily extracted into the organic phase in molecular state by the formation of hydr...

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Published in:Separation and purification technology 2005-08, Vol.44 (3), p.189-196
Main Authors: Niu, Guo-guang, Xie, Yu-chun, Lou, Jian-feng, Liu, Hui-zhou
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Crystallization, leaching, miscellaneous separations
Exact sciences and technology
Glycyrrhizic acid
Liquid-liquid extraction
Liquorice
Purification
Solvent extraction
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container_title Separation and purification technology
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creator Niu, Guo-guang
Xie, Yu-chun
Lou, Jian-feng
Liu, Hui-zhou
description Solvent extraction of glycyrrhizic acid (GA) from liquorice leaching solution was studied with tributyl phosphate, trialkylphosphine oxide, n-hexanol and 2-ethyl-hexanol as extractants. The results showed that GA was easily extracted into the organic phase in molecular state by the formation of hydrogen bond. pH was the key factor influencing the selectivity during extraction and stripping. The extraction mechanism was studied with transmitting electron microscopy and analysis of solute distribution. It was deduced that glycyrrhizic acid was extracted into the organic solvent in the form of molecular aggregation rather than as single molecules.
doi_str_mv 10.1016/j.seppur.2004.05.011
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subjects Applied sciences
Chemical engineering
Crystallization, leaching, miscellaneous separations
Exact sciences and technology
Glycyrrhizic acid
Liquid-liquid extraction
Liquorice
Purification
Solvent extraction
title Isolation and purification of glycyrrhizic acid with solvent extraction
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