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United States Department of Agriculture

Agricultural Research Service

Title: Evaluating the Critical Fluid Extraction and Reaction of Components in Cedarwood

Authors
item Eller, Fred
item King, Jerry

Submitted to: Intl Symposium on Supercritical Fluid Chromatography and Extraction
Publication Type: Proceedings
Publication Acceptance Date: April 8, 2000
Publication Date: N/A

Technical Abstract: The extraction of cedarwood oil (CWO) using carbon dioxide was studied at temperatures and pressures ranging from 25 degrees Celsius and 6.2 MPa up to 100 degrees Celsius and 41.4 Mpa. At pressures as low as 10.3 MPa and 25 degrees Celsius, the overall yield of CWO was 3.5 percent, indicating that liquid carbon dioxide can effectively extract CWO. Higher pressures resulted in only minor increases in yield. Extraction profiles indicated that the rate of extraction increased as either the extraction temperature or pressure increased. Gas chromatographic analyses of the fractions collected using liquid carbon dioxide extraction and supercritical carbon dioxide showed the hydrocarbons, alpha-cedrene and thujopsene, were completely extracted sooner than the alcohols, cedrol and widdrol. Attempts to synthesize cedryl acetate from cedrol by enzymatic conversion in supercritical carbon dioxide have thus far been unsuccessful.

Last Modified: 9/23/2014
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