Beyond Yield Optimization: The Impact of Organosolv Process Parameters on Lignin Structure

When optimizing the process parameters of acidic ethanolic organosolv process, aim is usually to maximize delignification and/or lignin purity. However, such as temperature, time, ethanol and catalyst concentration, respectively, can also be used vary structural properties obtained lignin, including molecular weight ratio aliphatic versus phenolic hydroxyl groups, among others. This review particularly focuses on these influencing factors establishes a trend analysis between variation effect structure. Especially when larger data sets are available, for temperature correlations distribution depolymerization condensation reactions found, which allow direct conclusions proportion lignin's features, independent diversity biomass used. The newfound insights gained from this tailor lignins isolated specific application.