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Losses were mainly due to the presence of emulsions; it was found that resveratrol was not present in these emulsions. The binaries methanol/cyclohexane and ethanol/cyclohexane were not usable for the operation, since with methanol and ethanol, most of the alcohol passes into the aqueous phase. The mass of the aqueous phase increased, approximately, to the initial mass of alcohol. For other mixtures, the proportion of cyclohexane for the same binary greatly affected the yield and selectivity. Whatever the mixture used, the proportion x of 33% of cyclohexane gave the best yields, showing that a higher proportion of alcohol is
needed to ensure a good transfer. However, the selectivity is reduced in the same proportion. The most interesting result involving satisfactory selectivity and yield, 6.4¡ë and 93% respectively, was obtained for the mixture: cyclohexane/pentanol (67/33). For x = 33%, while resveratrol was transferred into the organic phase
(yield 96%), the selectivity decreased (3.3¡ë).

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