Patent ID: 8528463

Claim:
A modular system for organosolv fractionation of lignocellulosic feedstock into component parts and further processing of said component parts; the modular process comprising: a first processing module configured for receiving, physically processing, and physico-chemically digesting a lignocellulose feedstock with a separately supplied organic solvent thereby extracting component parts therefrom said feedstock, and separating said component parts into a cellulosic solids fraction and a first liquid fraction; a second processing module configured for receiving therein said cellulosic solids fraction and for separating therefrom at least ethanol, a first class of lignin derivatives, and a de-lignified first stillage; a third processing module configured for separating the first liquid fraction into a second class of lignin derivatives, a third class of lignin derivatives and a filtrate, and for recovering a portion of the organic solvent from the filtrate by distillation thereby producing a second stillage; and a fourth processing module configured for separating the second stillage into one or more of an acetic acid-containing liquid fraction, a fourth class of lignin derivatives, a sugar syrup, and a semi-solid waste material.