Method for producing a cellulose suspension

C - Chemistry – Metallurgy – 08 – B

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C08B 1/00 (2006.01) D01F 2/00 (2006.01)

Patent

CA 2340778

A procedure to continuously produce a suspension of cellulose in aqueous N-methylmorpholine-N-oxide is characterized in that: (a) The cellulose is conveyed through a first shearing zone in the absence of N- methylmorpholine-N-oxide and is homogenized, and (b) the homogenized cellulose is conveyed through a second shearing zone after adding enough aqueous N-methylmorpholine-N- oxide for a suspension to result in a N-methylmorpholine-N- oxide content in the liquid phase of 70 - 80 weight percent after mixing, whereby the cellulose or suspension almost completely fills the available content cross-section in the shearing zones.

Procédé de préparation en continu d'une suspension de cellulose dans du N-méthylmorpholine-N-oxyde contenant de l'eau, caractérisé en ce que (a) la cellulose est acheminée, en l'absence de N-méthylmorpholine-N-oxyde et en étant soumise à l'homogénéisation, à travers une première zone de cisaillement et (b) la cellulose homogénéisée est acheminée dans une seconde zone de cisaillement après ajout d'une quantité de N-méthylmorpholine-N-oxyde contenant de l'eau telle qu'il en résulte, après mélange, une suspension à teneur en N-méthylmorpholine-N-oxyde dans la phase liquide de l'ordre de 70 à 80 pour cent en masse, la cellulose ou plus précisément la suspension remplissant totalement la section transversale d'acheminement disponible dans les zones de cisaillement.

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