D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/44 (2006.01) D21C 9/02 (2006.01) D21H 17/03 (2006.01)
Patent
CA 2092396
Brown stock washing of wood pulp is improved by adding a water-soluble cationic polymer to the wash water. The cationic polymer reacts with lignin solution present in the larger channels in the pulp mat to give a precipitate which lowers the flow rate of wash water through the larger channels. A more efficient wash water usage is obtained.
Amélioration du lavage de la pâte brune par ajout d'un polymère cationique hydrosoluble à l'eau de lavage. Le polymère cationique réagit avec la solution de lignine présente dans les plus grands canaux du matelas de pâte pour former un précipité qui ralentit le débit de l'eau de lavage dans ces canaux. On obtient alors une utilisation plus efficace de l'eau de lavage.
Li Pei
Pelton Robert H.
Dorset Industrial Chemicals Ltd.
Sim & Mcburney
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