Lignin Utilization I. Kinetics of Base-Catalyzed Condensation Reactions of Lignin Model Compounds
作者:
G. E. Troughton,
J. F. Manville,
期刊:
Canadian Journal of Forest Research
(NRC Available online 1972)
卷期:
Volume 2,
issue 3
页码: 271-275
ISSN:0045-5067
年代: 1972
DOI:10.1139/x72-044
出版商: NRC Research Press
数据来源: NRC
摘要:
Rates of formation were measured for the base-catalyzed condensation reactions occurring between 4-alkylguaiacol compounds and their 6-methylol derivatives over the temperature range 85.5–100 °C. It was found that both the intercondensation reaction between the 4-alkylguaiacol compound and its 6-methylol derivative and the self-condensation reaction of the latter compound occurred at significant rates. In the 4-propylguaiacol – 4-methyl-6-methylolguaiacol system, the above two condensation reactions occurring in this system had the same activation energies, 35 kcal/mol. Similarly, in the 4-methylguaiacol – 4-propyl-6-methylolguaiacol system these two condensation reactions had equivalent activation energies, but slightly lower than in the former system, 32 kcal/mol. The kinetic results found for the model guaiacol compounds in this study demonstrate the possibility that a lignin-derived compound having more than one reactive position can be developed into a phenolic-type resin.
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