Hydrogenation of canola oil in the presence of nickel and the methyl benzoate-chrome carbonyl complex |
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| Authors: | L J Rubin S S Köseoglu L L Diosady W F Graydon |
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| Affiliation: | (1) Department of Chemical Engineering and Applied Chemistry, University of Toronto, M5S 1A4 Toronto, Ontario, Canada;(2) Present address: Food Protein Research and Development Center, Texas Engineering Experiment Station, Texas A & M University, 77843-2476 College Station, Texas |
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| Abstract: | Canola oil was hydrogenated using a mixture of homogeneous methyl benzoate-Cr(CO)3 and heterogeneous nickel catalysts. The effect of the methyl benzoate-Cr(CO)3_to-nickel ratio on the activity, specific isomerization index, linoleate and linolenate selectivities, and fatty acid composition
was evaluated, and the results compared with those obtained with commercial nickel catalyst and methyl benzoate-Cr(CO)3 used individually. At higher chromium-to-nickel ratios the activity of nickel was inhibited and the system behaved essentially
like the pure chrome complex, while at low chromium-to-nickel ratios the characteristics of the nickel predominated. In a
short transition zone relatively high reaction rates were obtained with significantly reducedtrans-isomer levels in the product. In a broader sense, it may be possible to combine a homogeneous and heterogeneous catalyst
while retaining the advantages of both. We may thus be able to design catalyst systems for specific applications. |
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