Figure 4
From: Ionic liquids as a tool for lignocellulosic biomass fractionation
Schematic representation of the IL recovery technologies developed up to present. After pre-treatment the liquid stream is composed by IL, antisolvent and extracted material that can be recovered. The extracted material contains lignin, residual hemicellulose, degradation products and other soluble compounds. Generally, only lignin is recovered from liquid stream leading to losses of biomass residual materials at the end of the process. Depending on the IL recovery technology lower or higher pure IL can be obtained.