A shaped cellulose manufacturing process combined with a...

Details A shaped cellulose manufacturing process combined with a... A shaped cellulose manufacturing process combined with a...

C - Chemistry, Metallurgy

08

B

C08B 16/00 (2006.01) D01F 2/02 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2754521

There is disclosed a process for the manufacturing of shaped cellulose materials from lignocellulose wherein a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system forming a solution suitable for shaping new cellulose structures including fibers, films and cellulose derivatives. At least a part of the spent cellulose dissolving or cellulose shaping chemicals are recovered in one or more unit operations in a pulp mill chemical recovery cycle.

Cette invention concerne un procédé de fabrication de matériaux en cellulose façonnée à partir de lignocellulose, une pâte à papier de dissolution étant fabriquée et dissoute dans un système aqueux de solvant alcalin ou acide formant une solution appropriée pour le façonnage de nouvelles structures cellulosiques comprenant des fibres, des films et des dérivés cellulosiques. Une partie au moins des agents chimiques employés pour la dissolution ou le façonnage de la cellulose est récupérée lors d'une ou de plusieurs étapes dans un cycle de récupération d'agents chimiques d'usine de pâte à papier.

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