Patent ID: 8900369

Claim:
A system for fractionating lignocellulosic biomass, the system comprising: a precipitation tank configured for precipitation of cellulose and hemicellulose, and for solubilization of lignin; a washer configured for washing the precipitated cellulose and hemicellulose; and a stripper configured for stripping solvent from the precipitated cellulose and hemicellulose; wherein an operable connection between the washer and precipitation tank is configured so that during use the precipitated cellulose and hemicellulose are transferred from the precipitation tank to the washer; and wherein an operable connection between the washer and stripper is configured so that during use the solvent and precipitated cellulose and hemicellulose are transferred from the washer to the stripper; and wherein the system does not comprise a washer in direct operable connection with a hydrolysis tank.