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

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Donald MacNeil, Anna Sundberg, Lari Vähäsalo, Bjarne Holmbom
Publication year: 2011
Journal: Journal of Dispersion Science and Technology
Journal acronym: J DISPER SCI TECHNOL
Volume number: 32
Issue number: 2
Start page: 269
End page: 276
Number of pages: 8
ISSN: 0193-2691
eISSN: 1532-2351


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.


Fatty acids, flotation, pitch, resin acids, solubility

Last updated on 2020-10-04 at 05:50