Compared to other extractions, methods lignin extracted from this process is sulfur-free and has a molecular weight of approximately 5kDa. Nevertheless, the molecular weight of organosolv lignin relies on the organic solvent used. The drawbacks of this process are high extraction costs and environmental concerns when utilizing organic solvents. Certain benefits include that this process does not smell as bad as the kraft process and works well with agricultural residues. Numerous organosolv procedures, such as Acetosolv, Milox, and Alcell, have undergone in-depth research and testing in pilot-scale plants. Most of these processes are carried out by either using an acid catalyst or an acidic solvent, accomplished at lower temperatures as compared to the conventional pulping process, and avoid the use of sulfur-and chlorine-based compounds .