D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 1/06 (2006.01) D21B 1/02 (2006.01)
Patent
CA 2753944
The invention provides a composition of matter and a method, which enhance the process of mechanically pulping paper precursors. The composition of matter includes a small quantity of a reducing agent and a source of alkali. When added to the pulped material, e.g., wood chips, before or during mechanical pulping, the composition reduces the energy cost of the operation. In addition, not only does the composition also does not reduce the brightness of pulp, the composition can also enhance the effectiveness of subsequent bleaching processes.
L'invention porte sur une composition de matière et sur un procédé, qui permettent d'améliorer le procédé de mise en pâte mécanique de précurseurs de papier. La composition de matière comprend une petite quantité d'un agent réducteur et d'une source d'alcali. Lors de l'addition à la matière mise en pâte, par exemple, aux copeaux de bois, avant ou pendant la mise en pâte mécanique, la composition permet de réduire le coût énergétique de l'opération. De plus, non seulement la composition ne réduit pas la brillance de la pâte, mais encore la composition peut également augmenter l'efficacité des procédés de blanchiment ultérieurs.
Duggirala Prasad
Shevchenko Sergey M.
Nalco Company
Smart & Biggar
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