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Oxygen stages

Increased delignification before the bleach plant by extended or modified cooking and additional oxygen stages... [Pg.890]

During an alkaline oxygen stage the formation of keto structures by oxidation of ketols is postulated, finally leading to acids. Sodium permanganate treatments yield a moderate increase in both, carbonyls and carboxyl groups at short reaction times [20]. [Pg.6]

Demethoxylation is also possible and approximately 1.5 kg of methanol per tonne of pulp has been found in the effluent from an oxygen stage [86]. [Pg.405]

Stage Content of oxygen/% Stage Content of oxygen/%... [Pg.339]

See other pages where Oxygen stages is mentioned: [Pg.280]    [Pg.378]    [Pg.155]    [Pg.157]    [Pg.155]    [Pg.157]    [Pg.325]    [Pg.378]    [Pg.992]    [Pg.325]    [Pg.404]    [Pg.405]    [Pg.407]    [Pg.408]    [Pg.408]    [Pg.162]    [Pg.378]    [Pg.242]    [Pg.242]    [Pg.73]    [Pg.114]    [Pg.1238]   
See also in sourсe #XX -- [ Pg.216 , Pg.218 , Pg.219 , Pg.222 ]



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