Integriertes Verfahren zur selektiven Spaltung und Trennung von Lignozellulose in die Hauptbestandteile

Details

Veröffentlichungs-Nr.

EP2489780

Aktenzeichen

EP11154705

Anmeldetag

16. Februar 2011

Veröffentlichung

13. Juli 2016

Erteilung

13. Juli 2016

Rechtsraum

EP

IPC

D21C11/00

Abstract

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.

Anmelder

Firmen

Rheinisch-Westfälische Technische Hochschule Aachen
Rheinisch-Westfälisch-Technische Hochschule Aachen

Land

🇩🇪 Deutschland

Fachgebiete