Castor oil hydrogenation by a catalytic hydrogen transfer system using limonene as hydrogen donor

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...

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Bibliographic Details
Published in:Journal of the American Oil Chemists' Society 2005-04, Vol.82 (4), p.279-283
Main Authors: Martinelli, Márcia, Schneider, Rosana de Cassia de Souza, Baldissarelli, Vanessa Zanon, von Holleben, Maria Luiza, Caramao, Elina Bastos
Format: Article
Language:English
Subjects:
Biological and medical sciences
Castor oil
Catalysts
CTH
Fat industries
Food industries
Fundamental and applied biological sciences. Psychology
Hydrocarbons
Hydrogen
hydrogen donor
Hydrogenation
hydrogenation of castor oil
hydroxy stearic ester
keto stearic ester
Palladium
palladium catalyst
Vegetable oils
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Summary: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.
ISSN:0003-021X
1558-9331
DOI:10.1007/s11746-005-1067-4