Lignin oxidation and depolymerisation in ionic liquids
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Date
2015-09Author
Prado García, Raquel
Brandt, Agnieszka
Erdocia Iriarte, Xabier
Hallett, Jason
Welton, Tom
Labidi, Jalel
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Green Chemistry 18(3) : 834-841 (2016)
Abstract
The depolymerisation of lignin directly in the black liquor was studied, comparing two ionic liquids as extracting solvents (butylimidazolium hydrogen sulphate and triethylammonium hydrogen sulphate), under oxidising conditions. H2O2 was chosen as the oxidant agent. It was observed that lignins derived from butylimidazolium hydrogen sulphate were more susceptible to degradation. The main degradation products found in the extracted oils were aromatic acids, such as vanillic acid, benzoic acid and 1,2-benzenedicarboxylic acid.