EP 2489780 B1 20160713 - Integrated process for the selective fractionation and separation of lignocellulose in its main components
Title (en)
Integrated process for the selective fractionation and separation of lignocellulose in its main components
Title (de)
Integriertes Verfahren zur selektiven Spaltung und Trennung von Lignozellulose in die Hauptbestandteile
Title (fr)
Procédé intégré pour le fractionnement sélectif et la séparation de la lignocellulose en ses principaux composants
Publication
Application
Priority
EP 11154705 A 20110216
Abstract (en)
[origin: EP2489780A1] A method for processing lignocellulose comprises the step of contacting a lignocellulosic substrate with a biphasic liquid system in a reaction vessel, the biphasic liquid system comprising a first, aqueous phase and a second, organic phase which is at least partially immiscible with the first, aqueous phase under the conditions under which step a) is performed. The first, aqueous phase further comprises a carboxylic acid catalyst and the second, organic phase comprises a solvent selected from the group comprising esters, lactones, ethers and/or cyclic ethers with the proviso that said solvent does not comprise a hydroxyl group or hydroxyl groups. Preferred are oxalic acid as a catalyst and 2-methyltetrahydrofuran as the organic solvent. The set-up of a two-phase system affords the selective hemicellulose hydrolysis, together with efficient in situ cellulose-pulp delignification and in situ lignin extraction. Overall, all components are easily separated and are ready for further bio-refinery processing.
IPC 8 full level
D21C 11/00 (2006.01)
CPC (source: EP)
D21C 3/20 (2013.01); D21C 3/04 (2013.01); D21C 3/222 (2013.01); D21C 11/0007 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2489780 A1 20120822; EP 2489780 B1 20160713; WO 2012110231 A1 20120823; WO 2012110231 A8 20121101
DOCDB simple family (application)
EP 11154705 A 20110216; EP 2012000656 W 20120215