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                <term xml:lang="en">caffeine</term>
                <term xml:lang="en">lipid</term>
                <term xml:lang="en">spent coffee grounds</term>
                <term xml:lang="en">2-methyloxolane</term>
                <term xml:lang="fr">caféine</term>
                <term xml:lang="fr">lipide</term>
                <term xml:lang="fr">marc de café</term>
                <term xml:lang="fr">2-methyloxolane</term>
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              <p>This study attempts to shed light on the efficacy of the solvent 2-methyloxolane (2-MeOx) as an alternative for hexane in defatting spent coffee grounds (SCG). Higher lipid yields were obtained with the bio-based solvent dry 2-MeOx (13.67%) and water-saturated 2-MeOx (15.84%) compared to hexane oil yield, which is of petroleum origin and is a known neurotoxin. Palmitic acid and linoleic acid were the principal fatty acids identified. The fatty acid profile of coffee oils obtained with hexane, dry 2-MeOx and aqueous 2-MeOx were similar. Lipid hydrolysis was observed in oils extracted with 2-MeOx, which warrants further investigation. The residual caffeine content in the defatted SCG was highest when hexane was used highlighting better solubility of methylxanthine compounds in the solvent 2-MeOx.</p>
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              <p>L’objectif de cette étude était d’évaluer l’efficacité du solvant 2-méthyloxolane (2-MeOx) comme alternative à l’hexane dans le dégraissage du marc de café (SCG). Des rendements en lipides plus élevés ont été obtenus avec le solvant biosourcé sec 2-MeOx (13,67 %) et 2-MeOx saturé en eau (15,84 %) par rapport au rendement en huile obtenu dans l’hexane (solvant d’origine pétrolière et neurotoxique). L’acide palmitique et l’acide linoléique ont été les principaux acides gras identifiés. Les profils en acides gras des huiles de café obtenues avec de l’hexane, du 2-MeOx sec et du 2-MeOx aqueux sont similaires. L’hydrolyse des lipides a été observée dans les huiles extraites au 2-MeOx. La teneur résiduelle en caféine dans le SCG dégraissé était plus élevée lorsque l’hexane était utilisé, démontrant une meilleure solubilité des composés de méthylxanthine dans le solvant 2-MeOx.</p>
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