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- Can a solvent be used to extract oil from grape seeds?
- However, in the case of seeds with a low oil content such as grape seeds, solvent extraction is preferably used to maximize oil extraction yield . Although high oil yields are achieved by this process, use of organic solvents has several limitations, among which:
- Does grape seed oil extraction affect fatty acid profile?
- Given the unsaturation level of grape seed oils, those compounds are beneficial for oil conservation . The grape seed oil extraction method does not affect the fatty acid profile considering solvent extraction (hexane or petroleum ether) and Supercritical Fluid Extraction (SFE) .
- Which process is best for grape seed oil production?
- Screw pressing is the most efficient process for producing grape seed oil with a high yield, but supercritical CO 2 process permits an increase of polyphenol co-extraction with oil. The GAME process allows extraction of more polyphenols than screw pressing and constitutes an interesting process considering oil yield.
- How is oil extracted from grape seeds?
- For SFE, oil extraction is performed by a continuous flux of CO 2 through the seed bed. The amount of oil extracted then is dependent on the solubility of CO 2 towards oil. Interestingly, uniaxial expression without CO 2 of grape seeds does not allow oil extraction.
- What is oil extraction yield?
- Oil extraction yield was defined as the ratio of the mass of clarified oil recovered from extraction to the mass of oil originally present in the seeds for screw pressing experiments, and as the ratio of the mass of the oil phase recovered from SFE or GAME experiments to the mass of oil originally present in the seeds. 2.2.3.
- Why do grape seeds have a low extraction yield?
- GAME performed at 5.6 MPa leads to the lowest extraction yield (0.01 g/g). At a pressure of 5.6 MPa and a temperature of 104 °C, CO 2 is in a gaseous state. Therefore, the oil contained in grape seeds cannot be solubilised in CO 2, explaining the low yields.
