Study of Structure of Industrial Acid Hydrolysis Lignin, Oxidized in the H2O2-H2SO4 System

Products of oxidation of industrial acid hydrolysis lignin in the H ₂O ₂-H ₂SO ₄ system were studied using ¹³C NMR (in solution and solid state), MALDI-MS, and MS(ESI) techniques. Oxidation of hydrolysis lignin leads to the opening of aromatic rings of lignin, yielding carboxylic groups. Alkyl aryl...

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Bibliographic Details
Published in:Journal of wood chemistry and technology 2016-07, Vol.36 (4), p.259-269
Main Authors: Evstigneyev, Edward I., Yuzikhin, Oleg S., Gurinov, Andrey A., Ivanov, Alexandr Yu, Artamonova, Tatiana O., Khodorkovskiy, Mikhail A., Bessonova, Elena A., Vasilyev, Aleksander V.
Format: Article
Language:English
Subjects:
Acid hydrolysis lignin
Acids
Lignin
MALDI-MS
MS(ESI)
NMR
Oxidation
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Summary:Products of oxidation of industrial acid hydrolysis lignin in the H ₂O ₂-H ₂SO ₄ system were studied using ¹³C NMR (in solution and solid state), MALDI-MS, and MS(ESI) techniques. Oxidation of hydrolysis lignin leads to the opening of aromatic rings of lignin, yielding carboxylic groups. Alkyl aryl ether linkages (β-O-4-bonds) between lignin phenyl propane units are not significantly affected by the oxidation. The structure of oxidized hydrolysis lignin is proposed. The basic structural unit of oxidized hydrolysis lignin is a muconic acid derivative.
ISSN:1532-2319
0277-3813
1532-2319
DOI:10.1080/02773813.2015.1137945