Understanding lignin treatment in dialkylimidazolium-based ionic liquid–water mixtures
作者： Bing Yan , Kunlan Li , Ligang Wei , Yingchong Ma , Guolin Shao
DOI: 10.1016/J.BIORTECH.2015.08.005
关键词:
摘要: The treatment of enzymatically hydrolyzed lignin (EHL) in dialkylimidazolium-based ionic liquid (IL)-water mixtures (50-100wt% IL content) was investigated at 150°C for 3h. pH, type, and content were found to greatly influence the degradation structure regenerated lignin. 1-Butyl-3-methylimidazolium methylsulfonate-water with low pH facilitated depolymerization but destroyed substructure. Regenerated molecular weight narrow polydispersity index (2.2-7.7) obtained using a 1-butyl-3-methylimidazolium acetate-based system. Water addition inhibited 50-100wt% content, except 70wt% chloride-water mixture. Compared pure treatment, obvious differences observed breakdown inter-unit linkages ratio syringyl guaiacyl units IL-water treatment.
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