Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
4084329
Reference Type
Journal Article
Title
OXIDATION OF BETA-O-4 LIGNIN MODEL DIMERS BY H2O2 CATALYZED BY COPPER PHENANTHROLINE
Author(s)
Halma, M; Lachenal, D; Deronzier, A; Marlin, N; Zarubin, M
Year
2011
Location
Tianjin
Book Title
16th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC
Volume
1
Page Numbers
233-237
Language
English
Web of Science Id
WOS:000394407800048
URL
http://
://WOS:000394407800048
Exit
Abstract
This work aims at elucidating some of the key steps of the oxidation pathways of lignin model compounds using Cu(II)-phenantroline as catalyst and hydrogen peroxide as oxidant. Phenolic and non-phenolic beta-O-4 dimeric phenyl propane structures were selected as lignin models since they represent the most abundant structures in lignin.
The compounds used in this work are not commercially available; therefore all of them were synthesized.
Oxidation reactions were carried out under alkaline conditions, at 80 degrees C for 3 h. The lignin model dimer (LMD) disappearance and some of the oxidation products were identified by HPLC analyses.
Products as acetaldehyde, veratric or vanillic acid, and guaiacol were identified as resultant products of LMD oxidations. A tentative mechanism which involves the oxidation of the benzylic alcohol group followed by the cleavage of the beta-ether linkages is proposed.
Keywords
lignin model dimer; copper-phenanthroline; hydrogen peroxide; oxidation catalysis
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity