Isomerization of resin acids during pine oleoresin distillation

I. Portugal, J. Vital, L. S. Lobo

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


The aim of the present work was to understand and develop a model to describe the changes resin acids undergo during pine oleoresin processing. Experimental data for the thermal isomerization of levopimaric acid, in the temperature range 155-200°C, were used to develop a kinetic model. Model validation was based on the experimental results from the batch distillation of pine oleoresins. Both the experimental activation energy and pre-exponential factors seem to change during the course of distillation, due presumably to solvent (turpentine) removal.

Original languageEnglish
Pages (from-to)2577-2582
Number of pages6
JournalChemical Engineering Science
Issue number11
Publication statusPublished - 1 Jan 1996
Event14th International Symposium on Chemical Research Engineering (ISCRE 14) - Chemical Reaction Engineering: From Fundamentals to Commercial Plants and Products - Brugge, Belgium
Duration: 5 May 19968 May 1996


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