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Research Journal of Applied Sciences
Year: 2007  |  Volume: 2  |  Issue: 5  |  Page No.: 646 - 652

Oil Extraction from Sheanut Kernel (Vitellaria paradoxa Gaertn) and Canarium Pulp (Canarium schweinfurthii Engl.) Using Supercritical Co2 and Hexane: A Comparative Study

Gilles Bernard Nkouam, Cesar Kapseu, Danielle Barth, Michel Dirand and Jean Bosco Tchatchueng    

Abstract: Oil extraction using CO2 from sheanut kernel (Vitellaria paradoxa Gaertn.) and Canarium pulp (Canarium Schweinfurthii Engl.)has been studied in comparison with hexane extraction. Samples that were stored at 18 C and -33 C, were analyzed after 1 month, 1 year and 2 years. Results showed that the extraction yields varied (dry basis) from 17.43-39.57% for shea butter and from 16.10-40.45% for Canarium oil. Lipids extracted with CO2 gave highest acid values, but lowest iodine values what irrespective of the storage temperature. Shea butter analysis by gaseous phase chromatography indicated a composition in stearic and oleic acids that did not vary significantly. Butter extracted with supercritical CO2 from sheanut kernel stored at 18 C were rich in polyunsaturated fatty acid. These results suggest that greater investigations on supercritical CO2 extraction of these fatty materials should be encouraged because of its selectivity.

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