A process for the production of paper

Details A process for the production of paper A process for the production of paper

D - Textiles, Paper

21

H

D21H 21/10 (2006.01)

Patent

CA 2608146

The present invention relates to a process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibres, (ii) adding to the suspension after the last point of high shear: (a) a first anionic component which is a water-soluble anionic organic polymer; (b) a second anionic component which is a water-dispersible or branched anionic organic polymer; and (c) a third anionic component which is an anionic siliceous material; and (iii) dewatering the obtained suspension to form paper. The invention further relates to composition which comprises the first, second and third anionic components and the use of the composition as a flocculating agent in the production of pulp and paper and for water purification.

Cette invention concerne un procédé de production de papier, qui consiste: (i) à former une suspension aqueuse comprenant des fibres cellulosiques; (ii) à ajouter à cette suspension après le dernier point de cisaillement élevé: (a) un premier composant anionique constitué par un polymère organique anionique soluble dans l'eau; (b) un second composant anionique constitué par un polymère organique anionique dispersible dans l'eau ou ramifié; et (c) un troisième composant anionique constitué par une matière siliceuse anionique; et (iii) à sécher la suspension ainsi obtenue pour former du papier. Cette invention concerne en outre une composition qui comprend ces premier, deuxième et troisième composants anioniques et l'utilisation de cette composition comme agent floculant dans la production de pâte et de papier et dans l'épuration d'eau.

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