Lignocellulosic biomass is a valuable resource for making sustainable chemicals and fuels, but the presence of lignin makes it hard to extract the useful parts. Scientists have found that using special solvents like Ionic Liquids, Low Transition Temperature Mixtures, and Deep Eutectic Solvents can help remove lignin from biomass more efficiently. These solvents can selectively dissolve lignin while leaving cellulose untouched. By adjusting the extraction conditions and solvent composition, researchers can improve the efficiency of lignin extraction, making it a cost-effective and eco-friendly way to treat lignocellulosic biomass.