C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
C12P 19/14 (2006.01) B01F 1/00 (2006.01) C08B 1/00 (2006.01) C08J 3/14 (2006.01) C12P 19/04 (2006.01) D21H 17/25 (2006.01) D21H 19/42 (2006.01)
Patent
CA 2611787
The invention relates to a method for dissolving cellulose e.g. for the production of regenerated cellulose products such as films, fibres, particles and the like. In said method, the cellulose material is dissolved using an enzymatic treatment, followed by a base treatment. The invention is also directed to a method for producing cellulose particles wherein cellulose dissolved as described above is sprayed or mixed into a regenerating solution for precipitating cellulose particles. Moreover, the invention relates to the use of said cellulose particles produced with this method as a filler and/or coating pigment of paper and board. The invention is also directed to methods for producing and coating paper and board.
L~invention concerne un procédé de dissolution de cellulose, par exemple pour la production de produits de cellulose régénérée tels que des films, des fibres, des particules et analogues. Dans ledit procédé, le matériau de cellulose est dissous au moyen d~un traitement enzymatique, suivi par un traitement basique. L~invention concerne également un procédé de production de particules de cellulose, la cellulose dissoute comme décrit ci-dessus étant pulvérisée ou mélangée en une solution régénérante pour précipiter les particules de cellulose. En outre, l~invention concerne l~utilisation desdites particules de cellulose produites par ce procédé en tant que charge et/ou en tant que pigment de revêtement de papier et de carton. L~invention concerne également des procédés de production et de revêtement de papier et de carton.
Koivunen Kimmo
Laine Janne
Silenius Petri
Vuorinen Tapani
M-Real Oyj
Sim & Mcburney
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