METHOD OF PRODUCING LIGNIN WITH REDUCED AMOUNT OF ODOROUS SUBSTANCES

The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the steps of: i) dissolving isolated lignin into an alkali solution; ii)adding to the solution C1 -C 4 -alcohol in an amount of less than 30% by weight, based on the dry weight of the i...

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Bibliographische Detailangaben
Hauptverfasser:	TOMANI, PER, ALVARADO, FERNANDO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS APPARATUS THEREFOR ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS OF UNKNOWN CONSTITUTION CONCRETE DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS DYES LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL OR ARTIFICIAL THREADS OR FIBRES NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REFRACTORIES REGENERATION OF PULPING LIQUORS SEPARATION SLAG SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF NATURAL STONE USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the steps of: i) dissolving isolated lignin into an alkali solution; ii)adding to the solution C1 -C 4 -alcohol in an amount of less than 30% by weight, based on the dry weight of the isolated lignin;and iii) re-precipitating lignin by acidifying the solution. The invention also relates to a lignin product with reduced odor obtained and/or obtainable by the method and to the use of the obtained lignin as a component in polymer blends, an additive or filler in building materials, as binding agent in adhesives, and/or for the production of a carbon fiber, especially in indoor applications. La présente invention concerne un procédé de production de lignine présentant une quantité réduite de substances odorantes comprenant les étapes consistant à : i) dissoudre la lignine isolée dans une solution alcaline ; ii) ajouter, à la solution, un alcool en C1-C4 dans une quantité inférieure à 30 % en poids, sur base du poids sec de la lignine isolée ; et iii) reprécipiter la lignine par acidification de la solution. L'invention concerne également un produit de lignine présentant une odeur réduite, obtenu et/ou pouvant être obtenu par le procédé et l'utilisation de la lignine obtenue en tant que constituant dans des mélanges de polymères, additif ou charge dans des matériaux de construction, en tant qu'agent liant dans des adhésifs et/ou pour la production d'une fibre de carbone, en particulier dans des applications intérieures.