REACTION AND INTERACTION OF LIGNIN AND CARBOHYDRATE STRUCTURE MODELS DURING OXYGEN DELIGNIFICATION CONDITIONS

摘要

The reaction kinetics of different phenolic and non-phenolic lignin model compounds as well as a carbohydrate model, α-methyl-D-mannopyranoside, were studied and performed under oxygen delignification reaction conditions. The progress of the reactions was followed by HPLC and IPC analysis of the lignin and carbohydrate model compounds respectively. Multi variate analysis of the rate data was used with an experimental full factorial design to evaluate any occuring interactions between the reacting model compounds. The results show that, at the studied conditions 100℃ and 0.6 Mpa oxygen pressure in pure alkaline water/solvent system, no significant interaction could be observed. Both the non-phenolic and the carbohydrate model compound remained stable under these conditions.