Sökning: "sodium hydroxide"

Visar resultat 1 - 5 av 55 avhandlingar innehållade orden sodium hydroxide.

  1. 1. Electrochemical generation of polysulfide liquor and sodium hydroxide from white liquor

    Författare :Mårten Behm; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; White liquor; Kraft pulping; Polysulfides; Sodium hydroxide; Electrolysis; Autocatalysis; Cation-selective membranes; DSA; Nickel; Graphite; Electrochemistry; Elektrokemi;

    Sammanfattning : .... LÄS MER

  3. 2. Pretreatment of bagasse with sodium hydroxide and hydrogen peroxide in chemimechanical pulping

    Författare :Fuhua Peng; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pulp properties; hydrogen peroxide; bryghtness; sodium hydroxide; newsprint; impregnation; chemi-mechanical pulp; specific energy; pretreatment; bagasse;

    Sammanfattning : .... LÄS MER

  4. 3. High-yield chemimechanical pulping of bagasse

    Författare :Fuhua Peng; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pretreatment; newsprint; paper properties; bleaching; chemimechanical pulping; hydrogen peroxide; specific energy; sodium sulfite; sodium hydroxide; impregnation; bagasse;

    Sammanfattning : .... LÄS MER

  5. 4. Some aspects on TCF-bleachability of softwood alkaline pulps

    Författare :Karin Sjöström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bleachability; chlorine-free bleaching; softwoods; kraft pulps; alkaline sulfite pulps; oxygen; hydrogen peroxide; ozone; hydrogen sulfide ion; hydroxide ion; temperature; sodium ion.; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : The bleachability of softwood oxygen delignified pulps has been studied, i.e. the ease (requirement of bleaching chemicals) with which the pulps can be brightened to a target brightness in totally chlorine free (TCF) bleaching stages, including hydrogen peroxide, ozone and chelating agent stages. LÄS MER

  7. 5. 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