The Problem:
Lignins are macromolecules derived from wood, are the most abundant, renewable source for aromatic chemicals, and can be transformed into a compound with commercial potential, such as, fine chemicals, pharmaceutical ingredients, and sustainable aviation fuels. Current commercial technologies for chemical pulping of wood chips breakdown and burn lignins to generate low-grade heat and recoup pulping chemicals that have negative impacts on air emissions and treatment of wastewater effluent. Recovering or disposing of the chemicals and waste products in the process can harm the environment.
The Solution:
Researchers at the University of Alabama have developed a process using a bio-based, eco-friendly solvent for organosolv pulping of lignocellulosic biomass (e.g., softwoods, hardwoods, agricultural residues). The organosolv process uses solvents derived from glycerol and effectively extracts lignins from woody residues under mild process conditions. The process can breakdown lignins directly into desirable compounds, including flavorings and fragrances. Advancing pulping technologies that extract and isolate lignins from wood under mild process conditions can facilitate the integration of lignins into the economy and provide routes to make these renewable, domestic feedstocks into value-added aromatics.
Benefits: