Improved Oxygen Delignification of Bisulfite Pulps, 1996 International Pulp Bleaching Conference Proceedings

The role of peracetic acid in improving a second oxygen delignification step of softwood bisulfite pulp was investigated. The results showed that peracetic acid improved the degree of delignification in a second oxygen stage. probably by increasing the content of free phenolic hydroxyl groups and therefore making the lignin more receptive to a second oxygen stage. Oxygen pressurized peracetic acid stages were also studied and compared to atmospheric peracetic acid stages. Pressurized peracetic acid stages gave only a minor effect in lowering the Kappa number.

Author: Nilsson, H., Ek, M., Sjögren, T., Gellerstedt, G.
Improved Oxygen Delignification of Bisulfite Pulps, 1996 Int
Improved Oxygen Delignification of Bisulfite Pulps, 1996 International Pulp Bleaching Conference Proceedings
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