Supercritical CO2 extraction of fatty oil from flaxseed and comparison with screw press expression and solvent extraction processes |
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| Authors: | Rama Chandra Pradhan Venkatesh Meda Prasant Kumar Rout Satyanarayan Naik Ajay K. Dalai |
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| Affiliation: | 1. Centre for Rural Development and Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India;2. Dept. of Agriculture and Bioresource Engineering, University of Saskatchewan, Saskatoon, Canada;3. Department of Chemical Engineering, University of Saskatchewan, Saskatoon, Canada |
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| Abstract: | Flax oil is commonly used in food due to high percentage of omega-3-fatty acid and omega-6-fatty acid. In the present work the flax seed was extracted using green solvent viz. supercritical CO2 and compared with soxhlet and mechanical screw press methods. The chemical compositions of the oils were determined by CHNS analyser, GC-FID, GC/MS and 1H NMR. The supercritical CO2 process selectively extracted the fatty oils with high percentage of omega-3-fatty acid and omega-6-fatty acids. The chemical composition of screw press oil is close to that of supercritical CO2 extracted oil, whereas the yield is nearly 27% less in comparison to the supercritical CO2 method. |
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| Keywords: | Flaxseed Supercritical CO2 Analysis Omega-3-fatty acid Omega-6-fatty acid |
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