Sökning: "kraft pulps"

Visar resultat 11 - 15 av 57 avhandlingar innehållade orden kraft pulps.

  1. 11. Absorbent Materials from Kraft Pulp

    Författare :Fredrik Wernersson Brodin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MFC; retention; foam; TEMPO oxidation.; absorption; Absorbent;

    Sammanfattning : Superabsorbent polymers (SAP) have, since being introduced in the 1980s, become an important constituent in hygiene products, such as disposable diapers. The design of disposable diapers has changed over the years and today thinner products can be produced partly because of the excellent absorption and retention properties of the petrochemical-based SAP. LÄS MER

  3. 12. Kraft pulping of birch: Insights into delignification and xylan removal

    Författare :Carolina Marion de Godoy; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mass transport; xylan; kraft pulping; delignification; black liquor; hardwood;

    Sammanfattning : Kraft pulping is a well-established process in the production of many wood-based materials, holding a strategic position in the transition towards a bioeconomy. Nevertheless, further process development is needed to increase its resource-efficiency, assimilate new feedstocks and meet new specifications. LÄS MER

  4. 13. The effect of environment on refining efficiency of kraft pulps

    Författare :Marie Bäckström; Monica Ek; Lennart Salmén; Leif Robertsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Engineering; Kemiteknik;

    Sammanfattning : Although the pulp and paper mill processes have been operational for long time there is still a need to understand the unit operations in paper making and how they interact with the ingoing pulp material. This is crucial in order to fully utilize the potential of the wood as well as of the unit operations. LÄS MER

  5. 14. The effects of fines content and hydrogen sulphide gas pre-treatment on kraft pulping and the strength of polysulphide pulps

    Författare :Elisabet Brännvall; KTH; []
    Nyckelord :Bleachhability; Delignification; Fines; Hydrogen sulphide pre-treatment; Kraft pulping; Mechanical properties; Polysulphide; Softwood; Yield; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  7. 15. Förbehandling av sulfatmassa och sulfatlignin med kväveoxider

    Författare :Urban Öjteg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; delignifiering nitrogen dioxide; carbon dioxide; kraft pulps; pretreatment; bleaching; spent liquors; carboxylic acids; dinitrogen oxide; nitric acid; lignins; oxygen;

    Sammanfattning : .... LÄS MER