Abstract: An exemplary embodiment presents a method of lignin extraction from lignocellulosic biomass. Lignin is a rich and economical source of various valuable products. It is a platform chemical for renewable biofuels, composite materials, biofilms etc. Delignification of lignocellulosic biomass affords cellulose-rich material as an additional product that is already known for many applications like bioethanol and other chemicals. The method includes grinding the lignocellulosic biomass, mixing the dried lignocellulosic biomass powder with ionic liquid, stirring and heating of the mixture followed by solvent extraction of lignin from the mixture.