Influence of pitch composition and wood substances on the phase distribution of resin and fatty acids at different pH levels

A. Strand, Anna Sundberg, Lari Vähäsalo, Bjarne Holmbom

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    Pitch emulsions were prepared to mimic the colloidal wood resin system in paper mill process waters. The phase distribution of resin and fatty acids (RFAs) between the colloidal lipophilic droplets (l) and the water phase (w) were determined as pKlw values. The effect of triglyceride to RFA ratio on pKlw values was studied, to determine if seasonal variations in wood extractives influence their phase distribution. The effect of water-soluble hemicelluloses on pKlw values was also determined. The pKlw values of the RFAs were lower in emulsions with a low triglyceride to RFA ratio. Addition of water-soluble galactoglucomannans also lowered the pKlw values of the RFAs.
    Original languageUndefined/Unknown
    Pages (from-to)702–709
    Number of pages8
    JournalJournal of Dispersion Science and Technology
    Issue number5
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed


    • Colloidal pitch
    • fatty acids
    • galactoglucomannans (GGM)
    • hemicelluloses
    • phase distribution
    • resin acids
    • RFA
    • triglycerides

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