Journal
HOLZFORSCHUNG
Volume 56, Issue 6, Pages 623-631Publisher
WALTER DE GRUYTER & CO
DOI: 10.1515/HF.2002.095
Keywords
organosolv pulping; solvolysis; homolytic cleavage; reaction mechanism; beta-0-4 model compound; lignin
Categories
Ask authors/readers for more resources
A phenolic beta-O-4 type lignin model compound, guaiacylglycerol-beta-guaiacyl ether, was treated with 70 wt % aq 1,4-butanediol solution at 180degreesC to investigate the delignification mechanism under high-boiling solvent (HBS) pulping conditions. Thirteen compounds including four monomers, six dimers, two trimers and a tetramer were isolated from the reaction products. Most of these products were generated by recombination of phenoxy radicals formed by homolysis of the beta-aryl ether. The results suggest that phenolic beta-O-4 linkages in lignin are cleaved homolytically (radical mechanism) via quinone methide intermediates under HBS pulping conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available