Sökning: "Per Laine"

Hittade 1 uppsats innehållade orden Per Laine.

  1. 1. The origin of fibre charge in chemical pulp

    Uppsats för yrkesexamina på avancerad nivå, KTH/Skolan för kemivetenskap (CHE)

    Författare :Pär Lindén; [2013]
    Nyckelord :Hardwood kraft pulp; Eucalyptus; Uronic acid; Lignin; Total charge; Carboxylic groups; Conductometric titration; Methanolysis; Acid hydrolysis; Kappa number;

    Sammanfattning : Chemical components in wood contain multiple anionic groups, including carboxyl groups and hydroxyl groups. During kraft cooking and bleaching, such structures are also formed, degraded or modified by the action of reactions both deliberate and unwanted. It has previously been found by Laine that anionic groups with pKa values of 3.3 and 5. LÄS MER