Abstract
The hydrogenation of castor oil was investigated using a catalytic transfer hydrogenation system in which palladium on carbon was the catalyst and limonene was the solvent and hydrogen donor. The highest percentage of castor oil modification occurred at 178°C using 1% Pd/C and an oil/limonene ratio of 1∶3. The optimized system presented very good reproducibility and 100% conversion of the ricinoleate. GC using a mass spectrometer as detector and 1H NMR spectra of the products indicated that hydrogenation was accompanied by dehydrogenation leading to a mixture of 12-hydroxy and 12-keto stearic derivatives.
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Martinelli, M., Schneider, R.d.C.d.S., Baldissarelli, V.Z. et al. Castor oil hydrogenation by a catalytic hydrogen transfer system using limonene as hydrogen donor. J Amer Oil Chem Soc 82, 279–283 (2005). https://doi.org/10.1007/s11746-005-1067-4
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DOI: https://doi.org/10.1007/s11746-005-1067-4