Mohamad Nordin, Nor Asikin and Adnan, N. F. and Alias, A. and Isahak, W. N. R. W. and Salimon, J. and Yarmo, M. (2011) New silica supported HClO4 as efficient catalysts for estolide synthesis from oleic acid. In: X-ray and Related Techniques. Advanced Materials Research, 173 . Trans Tech Publications, Switzerland, pp. 140-145. ISBN 978-303785003-9
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Official URL: http://dx.doi.org/10.4028/www.scientific.net/AMR.1...
Abstract
The syntheses of estolides via condensation reaction of oleic acid were investigated using heterogenous catalysts. In this study HClO4 is supported onto suitable support to make it environmentally friendly. A series of solid acid catalyst containing 5-45 % of perchloric acid supported onto silica was synthesized and characterized using XRD, BET surface area measurement, TEM and XPS surface analysis. Silica modified with perchloric acid was found to be efficient and environmentally benign solid acid catalyst for estolide synthesis. The reaction was performed at 70 °C for 10 hours to give oleic-oleic monoestolide acid (m/z 563.51 as M-H)-. Based on the experimental findings above, optimum catalytic performance was with 15 % HClO4 loading onto SiO2 to give 98.98 % conversion of the oleic acid with 63.98 % oleic-oleic monoestolide acid selectivity.
| Item Type: | Book Section |
|---|---|
| Uncontrolled Keywords: | condensation, estolide synthesis, HClO4, oleic acid, silica |
| Subjects: | Q Science |
| Divisions: | Others |
| ID Code: | 29512 |
| Deposited By: | Liza Porijo |
| Deposited On: | 14 Mar 2013 08:49 |
| Last Modified: | 04 Feb 2017 08:31 |
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