Treatment of a mixture containing cellulose with a reducing...

D - Textiles – Paper – 21 – C

Patent

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D21C 9/00 (2006.01) C08B 1/00 (2006.01) C08B 1/02 (2006.01) C08B 1/06 (2006.01) C08B 11/12 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2489939

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising said treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

La présente invention concerne un procédé de traitement d'un mélange contenant de la cellulose qui comprend au moins une addition d'au moins un agent capable de réduire des groupes carbonyle. Cette invention concerne aussi une pâte cellulosique de spécialité obtenue par un procédé comprenant ce traitement. Cette invention concerne aussi l'utilisation de la pâte cellulosique de spécialité de cette invention ou la pâte cellulosique de spécialité obtenue par un procédé de cette invention en vue de produire des matériaux et des dérivés cellulosiques de spécialité contenant des molécules de cellulose, notamment des éthers ou des esters cellulosiques. Les dérivés de cellulose obtenus de la pâte cellulosique de spécialité de cette invention présentent une plus grande viscosité et/ou un meilleur brillant par rapport à des dérivés cellulosiques obtenus à partir d'une pâte cellulosique de spécialité non soumise au traitement de l'invention

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