Gilles Bernard Nkouam  , Cesar Kapseu  , Danielle Barth  , Michel Dirand  , Jean Bosco Tchatchueng  , 
    Oil Extraction from Sheanut Kernel (<I>Vitellaria paradoxa </I>Gaertn) and Canarium Pulp (<I>Canarium schweinfurthii </I>Engl.) Using Supercritical Co<SUB>2</SUB> and Hexane: A Comparative Study,
    Research Journal of Applied Sciences,
    Volume 2,Issue 5,
    2007,
    Pages 646-652,
    ISSN 1815-932x,
    rjasci.2007.646.652,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2007.646.652)
    Abstract: Oil extraction using CO<SUB>2</SUB> from sheanut kernel (<I>Vitellaria paradoxa </I>Gaertn.) and <I>Canarium</I> pulp (<I>Canarium Schweinfurthii </I>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 <I>Canarium</I> oil. Lipids extracted with CO<SUB>2</SUB> 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 CO<SUB>2</SUB> from sheanut kernel stored at 18 C were rich in polyunsaturated fatty acid. These results suggest that greater investigations on supercritical CO<SUB>2</SUB> extraction of these fatty materials should be encouraged because of its selectivity.
    Keywords: Vitellaria paradoxa gaertn;Canarium schweinfurthii Engl;supercritical carbon dioxide;extraction;lipids