Evaluation on the recovery of lignin from basic [Ch][Lys] systems using low-cost alcohols as anti-solvent under acid-free condition

An acid-free, high efficiency, and mild method of precipitating and separating lignin from basic ionic liquids (BIL) such as choline lysinate ([Ch][Lys]) by using alchohols (such as tert -butanol) as anti--solvents.