A process for the production of paper

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 1/66 (2006.01)

Patent

CA 2194680

A process for the production of paper by mixing an aqueous phase comprising white water with cellulose containing fibres, and optinal fillers, in a mixing stage to form an aqueous suspension, draining the suspension in the presence of a drainage or retention aid to form a fibre containing sheet or web and white water, and recirculating at least part of the white water to the mixing stage, whereby at least part of the white water is subjected to electrodialysis before the mixing stage.

L'invention concerne un procédé de production de papier. Ce procédé comprend les étapes consistant à mélanger une phase aqueuse comprenant de l'eau blanche avec de la cellulose contenant des fibres, et éventuellement, des charges, dans une étape de mélange, pour former une suspension aqueuse; à assurer la rétention de la suspension en présence d'un agent de rétention ou séquestrant pour former une feuille ou une bande contenant des fibres et de l'eau blanche; et à assurer la recirculation d'au moins une partie de l'eau blanche jusqu'au stade de mélange, au moins une partie de l'eau blanche étant ainsi soumise à l'électrodialyse avant l'étape de mélange.

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