Abstract
Oligomerisation of technical grade linoleic acid was studied over a broad temperature range. Effects of water and air were specifically addressed. The products were analysed by size-exclusion chromatography to give directly the concentrations of dimers and trimers. Oligomerisation of technical grade linoleic acid was seen to be dependent on temperature and the activation energy for monomer disappearance was 109 kJ/mol. A phenomenological kinetic model was proposed for the linoleic acid oligomerisation giving good model predictions. The presence of water inhibited the oligomerisation reaction. Extensive dimerisation and trimerisation occurred under a continuous air flow, whereas introduction of air pulses resulted in only a minor enhancement of trimerisation.
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Acknowledgments
This work is part of the activities at the Åbo Akademi Process Chemistry Centre (ÅA-PCC) within the Finnish Centre of Excellence Programme (2000–2011) appointed by the Academy of Finland. The authors acknowledge J. Hemming for his help in performing SEC-analyses.
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Tolvanen, P., Mäki-Arvela, P., Eränen, K. et al. Thermal Polymerisation and Autoxidation of Technical Grade Linoleic Acid. J Am Oil Chem Soc 85, 567–572 (2008). https://doi.org/10.1007/s11746-008-1229-7
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DOI: https://doi.org/10.1007/s11746-008-1229-7