Sökning: "cooking liquor"

Visar resultat 21 - 25 av 33 avhandlingar innehållade orden cooking liquor.

  1. 21. Characterization of Spruce Xylan and Its Potential for Strength Improvement

    Författare :Zheng Jansson; Elisabet Brännvall; Mikael Lindström; Hannes Vomhoff; Ulrica Edlund; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; xylan; paper strength;

    Sammanfattning : Xylan dissolved during kraft cooking and later redeposited on fibre surfaces has been shown to give higher pulp yield and better strength properties. This is economically interesting from an industrial point of view. LÄS MER

  3. 22. On calcium-related problems in kraft pulping of Eucalyptus dunnii

    Författare :Vijaya Lakshmi Vegunta; Olena Sevastyanova; Helena Håkansson; KTH; []
    Nyckelord :Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Kraft pulping is the most widely used pulping process for producing chemical pulp today. It has been in use for more than 130 years. LÄS MER

  4. 23. Inorganic ions in wood chips- Leaching prior to Kraft pulping and effect of calcium on Kraft delignification

    Författare :Anna Saltberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modelling; calcium; Scandinavian softwood; Keywords: Kraft pulping; potassium; birch; eucalyptus; aspen; acidic leaching; oxalate.;

    Sammanfattning : Wood is the main source of Non-Process Elements (NPEs), such as, calcium, potassium, manganese and chloride in Kraft pulp mills. Due to the recirculation of cooking chemicals and water, process disturbances related to the accumulation of NPEs in the process streams are inevitable. LÄS MER

  5. 24. Aspects on Strenght Delivery and Higher Utilisation of the Strength Potential of Kraft Pulp Fibres

    Författare :Elisabet Brännvall; Mikael Lindström; Herbert Sixta; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : Studies on strength delivery and related fields have so far concentrated on finding the locations in the mill where fibres are damaged and what the damages consist of. However, fibres will invariably encounter mechanical stresses along the fibreline and in this thesis a new concept is introduced; the vulnerability of fibres to mechanical treatment. LÄS MER

  7. 25. Birch xylan modification by lactide grafting

    Författare :Johanna Persson; Ann-Christine Albertsson; Monica Ek; Mikael Lindström; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The wood based biorefinery concept has led to an increasing interest in the possibility of using hemicelluloses as a source for value added products. Hemicelluloses are dissolved in large amounts in the process liquor during kraft pulping. LÄS MER