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- Nilsson, Helena, et al.
(författare)
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Improved oxygen delignification of bisulfite pulps.
- 1996
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Ingår i: Proceedings Int. Pulp Bleaching. ; , s. 14-18
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Konferensbidrag (refereegranskat)abstract
- 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 atm. peracetic acid stages. Pressurized peracetic acid stages gave only a minor effect in lowering the Kappa no.
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