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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


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Publikationens författare: A. Strand, A. Sundberg, L. Vähäsalo, B. Holmbom
Förläggare: TAYLOR & FRANCIS INC
Publiceringsår: 2011
Tidskrift: Journal of Dispersion Science and Technology
Tidskriftsakronym: J DISPER SCI TECHNOL
Volym: 32
Nummer: 5
Artikelns första sida, sidnummer: 702
Artikelns sista sida, sidnummer: 709
Antal sidor: 8
ISSN: 0193-2691
eISSN: 1532-2351


Abstrakt

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.


Nyckelord

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

Senast uppdaterad 2019-05-12 vid 05:36