Method for producing a cellulose suspension

The invention concerns a procedure for the continuous preparation of a suspension of cellulose in aqueous N-methylmorpholine-N-oxide. The suspension can be converted into a cellulose solution by heating and processed into cellulosic molded parts such as fibers, filaments and films by deformation and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Kind, Uwe, Kagalowski, Leo, Blech, Marco
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention concerns a procedure for the continuous preparation of a suspension of cellulose in aqueous N-methylmorpholine-N-oxide. The suspension can be converted into a cellulose solution by heating and processed into cellulosic molded parts such as fibers, filaments and films by deformation and regeneration. 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.