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Title: Aqueous thermal degradation of gallic acid

Abstract

Aqueous thermal degradation experiments show gallic acid, a naturally occurring aromatic carboxylic compound, decomposes rapidly at temperatures between 105/sup 0/ and 150/sup 0/C, with an activation energy of 22.9 or 27.8 kcal/mole, depending on pH of the starting solution. Pyrogallol is the primary product identified, indicating degradation via decarboxylation and a carbanion transition state. Relatively rapid degradation of vanillic, phthalic, ellagic and tannic acids has also been observed,suggesting that these and perhaps other aromatic acids could be short-lived in deep formation waters.

Authors:
; ; ;
Publication Date:
Research Org.:
Princeton Univ., NJ (USA)
OSTI Identifier:
5065374
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geochim. Cosmochim. Acta; (United States); Journal Volume: 52:2
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; GALLIC ACID; ACTIVATION ENERGY; THERMAL DEGRADATION; PHTHALIC ACID; TANNIC ACID; ACTIVATION ANALYSIS; DECARBOXYLATION; MAGMATIC WATER; PH VALUE; PYROGALLOL; TEMPERATURE EFFECTS; AROMATICS; CARBOXYLIC ACIDS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; DEVELOPERS; DICARBOXYLIC ACIDS; ENERGY; GROUND WATER; HYDROGEN COMPOUNDS; HYDROXY ACIDS; HYDROXY COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHENOLS; POLYPHENOLS; WATER; 580400* - Geochemistry- (-1989)

Citation Formats

Boles, J.S., Crerar, D.A., Grissom, G., and Key, T.C. Aqueous thermal degradation of gallic acid. United States: N. p., 1988. Web. doi:10.1016/0016-7037(88)90089-0.
Boles, J.S., Crerar, D.A., Grissom, G., & Key, T.C. Aqueous thermal degradation of gallic acid. United States. doi:10.1016/0016-7037(88)90089-0.
Boles, J.S., Crerar, D.A., Grissom, G., and Key, T.C. Mon . "Aqueous thermal degradation of gallic acid". United States. doi:10.1016/0016-7037(88)90089-0.
@article{osti_5065374,
title = {Aqueous thermal degradation of gallic acid},
author = {Boles, J.S. and Crerar, D.A. and Grissom, G. and Key, T.C.},
abstractNote = {Aqueous thermal degradation experiments show gallic acid, a naturally occurring aromatic carboxylic compound, decomposes rapidly at temperatures between 105/sup 0/ and 150/sup 0/C, with an activation energy of 22.9 or 27.8 kcal/mole, depending on pH of the starting solution. Pyrogallol is the primary product identified, indicating degradation via decarboxylation and a carbanion transition state. Relatively rapid degradation of vanillic, phthalic, ellagic and tannic acids has also been observed,suggesting that these and perhaps other aromatic acids could be short-lived in deep formation waters.},
doi = {10.1016/0016-7037(88)90089-0},
journal = {Geochim. Cosmochim. Acta; (United States)},
number = ,
volume = 52:2,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 1988},
month = {Mon Feb 01 00:00:00 EST 1988}
}