Sökning: "hexenuronic acid"

Visar resultat 6 - 10 av 21 avhandlingar innehållade orden hexenuronic acid.

  1. 6. On the Interrelation Between Kraft Cooking Conditions and Pulp Composition

    Författare :Catrin Gustavsson; Mikael E. Lindström; Jorge Colodette; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Delignification; Kraft pulping; Residual phase lignin; Hydroxide; Hydrogen sulphide ion; Ionic strength; Temperature; Bleachability; Hexenuronic acid; Carbohydrates; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : In the early 1990’s, a lot of work was focused on extending the kraft cook to a low lignin content (low kappa number). The driving force was the need to further reduce the environmental impact of the bleaching, as less delignification work would be needed there. LÄS MER

  3. 7. Further insights into kraft cooking kinetics

    Författare :Johannes Bogren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Delignification; Donnan equilibrium; Memory effects; Hexenuronic acid; Hofmeister effects; Modelling; Kraft cooking; Ionic effects; Reaction kinetics;

    Sammanfattning : .... LÄS MER

  4. 8. on the thermal yellowing of TCF- bleached birch kraft pulp

    Författare :Anders Granström; KTH; []
    Nyckelord :Ageing; Brightness reversion; Chalaton; Colour reversion; Dicarboxylic acids; Discoloration; HexA; Hexenuronic acid; Kraft pulp; Metal profile; Thermal yellowing; Xylan;

    Sammanfattning : .... LÄS MER

  5. 9. On the importance of radical formation in ozone bleaching

    Författare :Martin Ragnar; KTH; []
    Nyckelord :ozone; radical formation; superoxide; hydroxyl; selectivity; hexenuronic acid;

    Sammanfattning : .... LÄS MER

  7. 10. Characterization of chemical pulp fiber surfaces with an emphasis on the hemicelluloses

    Författare :John Sjöberg; KTH; []
    Nyckelord :adsorption; analytical pyrolysis; capillary electrophoresis; carbohydrate; chemical pulp; ECF pulp; enzymatic hydrolysis; fibre surface; hardwood; hemicellulose; hexenuronic acid; kraft pulp; molecular weight distribution; peeling; residual lignin; s;

    Sammanfattning : .... LÄS MER