A fatty methyl ester product has been made using two routes. Soybean oil was thermally polymerized anaerobically without a catalyst at 330 °C and the material was then transesterified using base catalyst and methanol. Alternatively, a similar product can be obtained by heating methyl linoleate to the same temperature in a pressure reactor. The product structure was studied by NMR spectroscopy, gel permeation chromatography and mass spectrometry. It is a dimeric product which does not contain substituted cyclohexane structures. This evidence shows that the Diels-Alder reaction has not occurred under these conditions. This is in contradiction to many literature reports, but in agreement with a neglected paper from 1971. This correction has implications in both biodiesel and industrial oil products.
|Original language||English (US)|
|Number of pages||8|
|Journal||JAOCS, Journal of the American Oil Chemists' Society|
|State||Published - Jun 1 2012|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Organic Chemistry