Document Detail


Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water.
MedLine Citation:
PMID:  18500780     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Li-li Lu; Xiu-yang Lu; Nan Ma
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of Zhejiang University. Science. B     Volume:  9     ISSN:  1673-1581     ISO Abbreviation:  -     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-05-26     Completed Date:  2008-07-24     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101236535     Medline TA:  J Zhejiang Univ Sci B     Country:  China    
Other Details:
Languages:  eng     Pagination:  401-6     Citation Subset:  IM    
Affiliation:
Institute of Pharmaceutical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China.
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MeSH Terms
Descriptor/Qualifier:
Catalysis
Hydrolysis
Kinetics
Tannins / chemistry*
Temperature
Chemical
Reg. No./Substance:
0/Tannins
Comments/Corrections

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