Sökning: "pulp washing"

Visar resultat 6 - 10 av 23 avhandlingar innehållade orden pulp washing.

  1. 6. Inverkan av hög temperatur vid tvättning av kemisk massa

    Författare :Gunnar Eriksson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sulfate pulp; kappa number; pulp washing; diffusion; lignin; leaching;

    Sammanfattning : .... LÄS MER

  3. 7. Precipitation of Kraft Lignin under Alkaline Conditions

    Författare :Jonas Sundin; KTH; []
    Nyckelord :Alkali lignin; Black liquors; Bleaching; Calcium; Coagulation; Colloids; Kraft pulp; Magnesium; Metals; Mills; Precipitation; Washing;

    Sammanfattning : .... LÄS MER

  4. 8. Storage of Hydrogen Peroxide Bleached Mechanical Pulp : Reduction in Reflectance over the Visible Spectrum

    Författare :Sofia Enberg; Per Engstrand; Magnus Paulsson; Mats Rundlöf; Patrik Axelsson; Øyvind Eriksen; Yonghao Ni; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The objective of this thesis is to determine possible causes of the darkening of hydrogen peroxide bleached mechanical pulp over the visible spectrum and their relative contributions. It focuses on both process conditions and the composition of the pulp and the dilution water, including additions or losses of material along the process line from the bleach tower to the paper machine. LÄS MER

  5. 9. Some aspects of adsorption in displacement washing of pulp

    Författare :Karin Mattsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : AbstractThere are many aspects on how to improve the paper pulping process. In the washing sequence improvements to decrease the discharge to the environment can be achieved by closure of the liquid system and recycling liquid from other parts pulp process. LÄS MER

  7. 10. Precipitation and separation of lignin from kraft black liquor

    Författare :Fredrik Öhman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pressing; filtration; washing; lignin; separation; precipitation; black liquor; extraction;

    Sammanfattning : The separation of lignin from black liquor is an attractive option to consider for pulp mills. In modern pulp mills, lignin extraction offers the opportunity of withdrawing an energy surplus in the form of a solid biofuel. LÄS MER