Title: Improved oxygen delignification of bisulfite pulps.
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.
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: article
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