Extraction/fractionation and deacidification of wheat germ oil using supercritical carbon dioxide

Brazilian Journal of Chemical Engineering

P. Zacchi²  J. Daghero¹  P. Jaeger²  R. Eggers² 

[1] ,Technische Universität Hamburg-HarburgHamburg,Germany

关键词: Free fatty acids;    FFA;    Wheat germ oil;    Supercritical fluids;    Tocopherols;   

DOI  :  10.1590/S0104-66322006000100011

来源: SciELO

【 摘 要 】

Wheat germ oil was obtained by mechanical pressing using a small-scale screw press and by supercritical extraction in a pilot plant. With this last method, different pressures and temperatures were tested and the tocopherol concentration in the extract was monitored during extraction. Then supercritical extracted oil as well as commercial pressed oil were deacidified in a countercurrent column using supercritical carbon dioxide as solvent under different operating conditions. Samples of extract, refined oil and feed oil were analyzed for free fatty acids (FFA) and tocopherol contents. The results show that oil with a higher tocopherol content can be obtained by supercritical extraction-fractionation and that FFA can be effectively removed by countercurrent rectification while the tocopherol content is only slightly reduced.

【 授权许可】

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