Full Text:   <1828>

CLC number: R914

On-line Access: 

Received: 2007-12-03

Revision Accepted: 2008-03-24

Crosschecked: 0000-00-00

Cited: 4

Clicked: 4090

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
1. Reference List
Open peer comments

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

http://doi.org/10.1631/jzus.B0730098


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.

@article{title="Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water",
author="Li-li LU, Xiu-yang LU, Nan MA",
journal="Journal of Zhejiang University Science B",
volume="9",
number="5",
pages="401~406",
year="2008",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B0730098"
}

%0 Journal Article
%T Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water
%A Li-li LU
%A Xiu-yang LU
%A Nan MA
%J Journal of Zhejiang University SCIENCE B
%V 9
%N 5
%P 401~406
%@ 1673-1581
%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0730098

TY - JOUR
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


Abstract: 
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

Reference

[1] Akiya, N., Savage, P.E., 2002. The roles of water for chemical reactions in high-temperature water. Chem. Rev., 102(8):2725-2750.

[2] Chen, J.H., Zhang, Z.H., Wang, Y.M., Bi, L.W., Wu, Z.S., Wu, D.M., 1995. Study on direct alkaline hydrolysis to manufacture gallic acid from tara powder. Chem. Ind. Forest Prod., 15(1):1-8 (in Chinese).

[3] Eckert, C.A., Liotta, C.L., Bush, D., Brown, J.S., Hallett, J.P., 2004. Sustainable reactions in tunable solvents. J. Phys. Chem. B, 108(47):18108-18118.

[4] Lee, W.M., 2000. Process Using Hydroxylamine-Gallic Acid Composition. US Patent No. 6,276,372.

[5] Liu, Q.Z., Zhang, K.K., 2002. Determination of gallic acid in Chinese gallnut by high performance liquid chromatography. Chin. Trad. Herb. Drugs, 33(5):427-428 (in Chinese).

[6] Lu, J., Brown, J.S., Boughner, E.C., Liotta, C.L., Eckert, C.A., 2002. Solvatochromic characterization of near-critical water as a benign reaction medium. Ind. Eng. Chem. Res., 41(12):2835-2841.

[7] Lu, X.Y., He, L., Zheng, Z.S., Cai, L., 2003. Green chemical progress in near-critical water. Chem. Ind. Eng. Progr., 22(5):477-481 (in Chinese).

[8] Nakamura, Y., Tsuji, S., Tonogai, Y., 2003. Method for analysis of tannic acid and its metabolites in biological samples: application to tannic acid metabolism in the rat. J. Agric. Food Chem., 51(1):331-339.

[9] Nolen, S.A., Liotta, C.L., Eckert, C.A., Glaser, R., 2003. The catalytic opportunities of near-critical water: a benign medium for conventionally acid- and base-catalyzed condensations for organic synthesis. Green Chem., 5(5):663-669.

[10] Sasaki, M., Fang, Z., Fukushima, Y., Adschiri, T., Arai, K., 2000. Dissolution and hydrolysis of cellulose in subcritical and supercritical water. Ind. Eng. Chem. Res., 39(8):2883-2890.

[11] Shahrzad, S., Bitsch, I., 1998. Determination of gallic acid and its metabolites in human plasma and urine by high-performance liquid chromatography. J. Chromatogr. B: Biomed. Sci. Appl., 705(1):87-95.

[12] Wang, Z.D., 1995. An important fine chemicals-gallic acid. Nat. Gas Chem. Ind., 20(1):38-43 (in Chinese).

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - Journal of Zhejiang University-SCIENCE