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A new model for the fractionation of fish oil FAEEs

[Display omitted] •Fractionation of fish oil FAEEs with scCO2 was carried out at 333K and 14.5MPa.•Under these conditions EPA distributes equally between the extract and raffinate.•Concentrations up to 74% of ω-3 FAEEs were achieved in the raffinate.•The solubility of the mixture appears to be indep...

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Bibliographic Details
Published in:The Journal of supercritical fluids 2017-02, Vol.120 (2, SI), p.258-265
Main Authors: Pieck, Carlos Ariel, Crampon, Christelle, Charton, Frédéric, Badens, Elisabeth
Format: Article
Language:English
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Summary:[Display omitted] •Fractionation of fish oil FAEEs with scCO2 was carried out at 333K and 14.5MPa.•Under these conditions EPA distributes equally between the extract and raffinate.•Concentrations up to 74% of ω-3 FAEEs were achieved in the raffinate.•The solubility of the mixture appears to be independent of the composition.•A new simplified model is used to relay the products compositions and extract yield. In this work, the supercritical fractionation of fatty acid ethyl esters derived from fish oil was carried out with carbon dioxide at 333K and 14.5MPa. The feed mixture is very complex, with over 80 different compounds detected by GC. Among them, the EicosaPentaenoic Acid (EPA) and DodecaHexaenoic Acid (DHA) ethyl esters are of major industrial interest since the consumption of these ω-3 acids has been linked to a reduced risk of cardiovascular diseases. The influence of the process parameters on the separation efficiency is an important point for an economic analysis of the overall purification process. First, the partition of the feed mixture was determined for different solvent-to-feed ratios varying between 21.8 and 143; the extract yield (i.e. the mass fraction of feed recovered as extract) has been calculated for each condition. Then, a new simplified equilibrium-stage model was developed and applied to the mixture. Supposing a constant distribution ratio, this model is able to correlate the influence of the solvent-to-feed ratio (through a calculated extract yield) on the concentration of the major 24 compounds present either in the feed or in the extract and raffinate, including components with low, medium and high distribution ratios.
ISSN:0896-8446
1872-8162
DOI:10.1016/j.supflu.2016.05.024