Prado R., Erdocia X., Labidi J., 2014, Study of the Influence of Reutilization of Ionic Liquid for Lignin Extraction, Chemical Engineering Transactions, 39, 1621-1626.
The development of green techniques for biomass processing and fractionation is crucial from the point of view of sustainability and environmental protection. Lignin is the second most abundant bio-renewable material on Earth. Ionic liquids are considered as green solvents due to their low vapour pressure and their reuse possibility. In this work, the recyclability of Methyl sulphate Butylmethylimidazolium ionic liquid on the obtaining of lignin from biomass was studied. The experimental results showed that the obtained lignins were similar until the third cycle and the extraction process showed good performances, whereas in the fourth cycle, obtained lignin was contaminated by ionic liquid and the performance of ionic liquid decreased dramatically.
