Recently, vegetable oils have been widely used in several industrial fields as food additives, biofuels, cosmetic ingredients, packaging materials, or pharmaceutical compounds. In this study, we investigated the extraction of lipids from spent coffee grounds using an innovative system and the hydrofluorocarbon Norflurane, as solvent. Extraction experiments were performed on matrices at different levels of moisture under a recirculating solvent flow in the pressure range 5−11 bar.

The results confirmed the effectiveness of the novel extraction process on wet, dried and partially dried matrices, and the oil yields and the extraction times (approximately 92% in 75, 90 and 285 min respectively) were comparable with those obtained using the more expensive supercritical CO₂ process. A kinetic approach was used to model the extraction rates of wet, dry and partially dried samples. It showed that a partial drying of the SCG promoted the solubilization of oil in Norflurane during the first extraction stage and improved the contact between Norflurane and the oily solute.

The fatty acid profiles of the extracts were determined and the results revealed the presence of palmitic (C 16:0) and linoleic (C 18:2) acids, as major components, and stearic (C 18:0) and oleic (C 18:1) acids, as minor components.

最近，植物油已在多个工业领域中广泛用作食品添加剂，生物燃料，化妆品成分，包装材料或药物化合物。在这项研究中，我们研究了使用创新系统和氢氟烃诺氟醚作为溶剂从咖啡渣中提取脂质的方法。在压力为5-11 bar的循环溶剂流下，对水分含量不同的基质进行了萃取实验。

结果证实了新型萃取方法对湿，干和部分干燥基质的有效性，并且油的产率和萃取时间（分别在75、90和285分钟内约为92％）与使用更昂贵的超临界萃取所获得的结果相当。 CO ₂工艺。使用动力学方法来模拟湿，干和部分干燥样品的提取速率。结果表明，在第一萃取阶段，SCG的部分干燥促进了诺氟醚中油的溶解，并改善了诺氟醚与油性溶质之间的接触。

确定了提取物的脂肪酸谱，结果表明存在棕榈酸（C 16：0）和亚油酸（C 18：2）作为主要成分，以及硬脂酸（C 18：0）和油酸（C 18） ：1）酸，作为次要成分。