Effect of calcium on the phase distribution of resin and fatty acids in pitch emulsions

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Donald MacNeil, Anna Sundberg, Lari Vähäsalo, Bjarne Holmbom
Förläggare: TAYLOR & FRANCIS INC
Publiceringsår: 2011
Tidskrift: Journal of Dispersion Science and Technology
Tidskriftsakronym: J DISPER SCI TECHNOL
Volym: 32
Nummer: 2
Artikelns första sida, sidnummer: 269
Artikelns sista sida, sidnummer: 276
Antal sidor: 8
ISSN: 0193-2691
eISSN: 1532-2351


Abstrakt

Resin and fatty acids (RFAs) play a key role in deinking processes of recycled fiber after precipitation by calcium. The distribution of RFAs between the lipophilic/colloidal phase and the water phase, here called pK(lw), was determined by gas chromatography for different emulsions of TMP pitch and fatty acid soaps in the presence of calcium ions. Resin acids were at least partially dissolved at alkaline conditions even at high calcium ion concentrations, while fatty acids were only slightly soluble. The structure of the component was an important factor, along with the calcium content present which made fatty acids practically insoluble.


Nyckelord

Fatty acids, flotation, pitch, resin acids, solubility

Senast uppdaterad 2019-15-12 vid 03:53