PROCESS FOR SEPARATING LIGNIN FROM LIGNOCELLULOSIC MATERIALS

The present invention provides a process for separating lignin from a lignocellulosic material in order to obtain cellulose free or substantially free of lignin, the process comprising the steps of (a) preparing a CO 2 -triggered switchable solvent by mixing water, a water-insoluble amine which is a...

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Bibliographische Detailangaben
Hauptverfasser:	Ochoa Gómez, José Ramón, Lorenzo Ibarreta, Leire, Blanco Pérez, Noelia
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS THEREFOR CHEMISTRY COMPOSITIONS BASED THEREON COMPOUNDS OF UNKNOWN CONSTITUTION DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides a process for separating lignin from a lignocellulosic material in order to obtain cellulose free or substantially free of lignin, the process comprising the steps of (a) preparing a CO 2 -triggered switchable solvent by mixing water, a water-insoluble amine which is a secondary amine, a tertiary amine, or a combination thereof, and CO 2 ; (b) mixing the lignocellulosic material with the CO 2 -triggered switchable solvent obtained in step (a), thereby the lignin is dissolved in the solvent and the cellulose is not dissolved; and (c) separating the cellulose.