Aqueous thermal degradation of gallic acid

Journal Article · Mon Feb 01 00:00:00 EST 1988 · Geochim. Cosmochim. Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(88)90089-0· OSTI ID:5065374

Boles, J S; Crerar, D A; Grissom, G; Key, T C

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.

• Research Organization: Princeton Univ., NJ (USA)
• OSTI ID: 5065374
• Journal Information: Geochim. Cosmochim. Acta; (United States), Vol. 52:2
• Country of Publication: United States
• Language: English

Related Subjects

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)