Sökning: "delignification"

Visar resultat 21 - 25 av 58 avhandlingar innehållade ordet delignification.

  1. 21. Extended impregnation kraft cooking of softwood : Effects on reject, yield, pulping uniformity, and physical properties

    Författare :Katarina Karlström; Mikael E. Lindström; Elisabet Brännvall; Kristofer Gamstedt; Anna Jacobs; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high kappa number pulp; extended impregnation; softwood; spruce; picea abies; pine; pinus sylvestris; uniform delignification; kappa number distribution; reject; yield; tensile index; tensile stiffness index; SCT; starch multilayers; mechano-sorptive creep; hygroexpansion; dimensional stability; eucalypt; birch; acacia; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : Converting wood into paper is a complex process involving many different stages, one of which is pulping. Pulping involves liberating the wood fibres from each other, which can be done either chemically or mechanically. LÄS MER

  3. 22. Delignification and bleachability of kraft pulps pretreated with nitrogen dioxide

    Författare :Per Larsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chlorine dioxide; oxygen bleaching; molecular mass; paper properties; ozone bleaching; nitrogen dioxide; kraft pulps; pretreatment; gel permeation chromatography; indulin AT; hydrogen peroxide; consecutive alkaline extractions;

    Sammanfattning : .... LÄS MER

  4. 23. Characterization of acetylated hemicelluloses from hardwood

    Författare :Maria Nordström; KTH; []
    Nyckelord :acetyl; aspen; birch; chlorite delignification; degree of acetylation;

    Sammanfattning : .... LÄS MER

  5. 24. Some aspects on extended kraft pulping : the influence of cooking parameters on delignification, bleachability and carbohydrate degradation

    Författare :Catrin A-S. Gustavsson; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 25. The impact of extended oxygen delignification on bleachability of kraft pulps

    Författare :Camilla Rööst; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER