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CLC number: R914

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Received: 2007-12-03

Revision Accepted: 2008-03-24

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Journal of Zhejiang University SCIENCE B 2008 Vol.9 No.5 P.401-406


Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water

Author(s):  Li-li LU, Xiu-yang LU, Nan MA

Affiliation(s):  Institute of Pharmaceutical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   luxiuyang@zju.edu.cn

Key Words:  High temperature liquid water, Gallotannin, Tara tannin, Non-catalyzed hydrolysis, Kinetics

Li-li LU, Xiu-yang LU, Nan MA. Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water[J]. Journal of Zhejiang University Science B, 2008, 9(5): 401-406.

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author="Li-li LU, Xiu-yang LU, Nan MA",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water
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%A Xiu-yang LU
%A Nan MA
%J Journal of Zhejiang University SCIENCE B
%V 9
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0730098

T1 - Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water
A1 - Li-li LU
A1 - Xiu-yang LU
A1 - Nan MA
J0 - Journal of Zhejiang University Science B
VL - 9
IS - 5
SP - 401
EP - 406
%@ 1673-1581
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0730098

high temperature liquid water (HTLW) has drawn increasing attention as an environmentally benign medium for organic chemical reactions, especially acid-/base-catalyzed reactions. Non-catalyzed hydrolyses of gallotannin and tara tannin in HTLW for the simultaneous preparation of gallic acid (GA) and pyrogallol (PY) are under investigation in our laboratory. In this study, the hydrolysis kinetics of gallotannin and tara tannin were determined. The reaction is indicated to be a typical consecutive first-order one in which GA has formed as a main intermediate and PY as the final product. Selective decomposition of tannin in HTLW was proved to be possible by adjusting reaction temperature and time. The present results provide an important basic data and reference for the green preparation of GA and PY.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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