Sorbonne universités, Université de Technologie de Compiègne, Laboratoire Transformations Intégrées de la Matière Renouvelable (TIMR EA 4297), Centre de Recherche de Royallieu, B.P. 20529-60205 Compiègne Cedex, France.
Sorbonne universités, Université de Technologie de Compiègne, Laboratoire Transformations Intégrées de la Matière Renouvelable (TIMR EA 4297), Centre de Recherche de Royallieu, B.P. 20529-60205 Compiègne Cedex, France.
Ultrason Sonochem. 2017 Nov;39:58-65. doi: 10.1016/j.ultsonch.2017.04.003. Epub 2017 Apr 11.
The current procedure of rapeseed oil extraction is based on a first extraction step by pressing followed by a second extraction step with hexane. This solvent being toxic for the users, the consumers and the environment, its use could be forbidden within the coming years. Stimulated by a stringent regulation, the research activity for the replacement of toxic solvents shows a significant development. The aim of this study was to select alternative solvent to hexane such as ethanol or isopropanol, and, to adjust the oil extraction process by developing an ultrasound assisted method. The objective was to reach a comparable efficiency but also to enhance the oil quality. When applied to isopropanol, the ultrasound assisted extraction method has shown promising results, and comparable to those obtained with hexane (oil yield of 80% for hexane and 79% for isopropanol at optimum extraction conditions (20min of ultrasound pretreatment followed by 2h of additional solid/liquid extraction)). Conversely, in studied conditions, ethanol did not seem to be an appropriate alternative solvent to hexane as the extraction yields obtained by using this solvent were quite low.
目前的菜籽油提取工艺是先压榨，再用正己烷进行二次提取。由于正己烷对使用者、消费者和环境都有毒性，未来几年可能会被禁止使用。受严格法规的推动，对替代有毒溶剂的研究活动取得了显著的发展。本研究的目的是选择替代正己烷的溶剂，如乙醇或异丙醇，并通过开发超声辅助方法来调整油脂提取工艺。目标是达到相当的效率，同时提高油的质量。当应用于异丙醇时，超声辅助提取方法显示出了有希望的结果，与正己烷相当（在最佳提取条件下（超声预处理 20 分钟，然后再进行 2 小时的固/液萃取），正己烷的出油率为 80%，异丙醇为 79%））。相反，在研究条件下，乙醇似乎不是正己烷的合适替代溶剂，因为使用这种溶剂得到的提取率相当低。
