A new process for extraction of essential oils from orange peels (Citrus sinensis L.) using microwave and centrifugal (MW/C) force was studied. MW/C is a combination of microwave heating to explode the internal cells of biological material, and centrifugation to intensify diffusion, collection and separation of compounds of interest. MW/C is performed at atmospheric pressure with an injection of water vapor. A detailed study concerning optimization of different operating parameters like microwave power density and centrifugation was performed. MW/C has been compared to the hydrodistillation method. In addition of essential oils collection, in the aqueous phase several phenolic compounds can be obtained and valorized. Influence of the two main parameters was discussed first on essential oils and, in second part, on phenolic compounds recovery. The new combined MW/C process provided reduction in the extraction time compared to hydrodistillation method, with an advantage to collect in a same experiment volatile and nonvolatile compounds with high quality.

Industrial relevance

This work was carried out thanks to the investment of IFTS France, an international technical center worldwide known in the field of solid-fluid separations. Considering the huge amount of plant extracts this new combined system using microwave and centrifugal (MW/C) force may be suitable for scaling up. The results of this investigation on pilot reactors pave the way for the design of an industrial device.

中文翻译：

---

结合微波加热和离心力开发绿色创新的半工业规模中试设备，从橙皮中提取香精油和酚类化合物

从橙皮精油的提取新工艺（脐橙大号。）使用微波和离心力（MW / C）进行了研究。MW / C是微波加热使生物材料的内部细胞爆炸，以及离心增强目标化合物的扩散，收集和分离的组合。MW / C在大气压下注入水蒸气进行。进行了有关优化不同操作参数（如微波功率密度和离心力）的详细研究。MW / C已与加氢蒸馏方法进行了比较。除了收集精油外，在水相中还可以得到几种酚类化合物并进行增值。首先讨论了两个主要参数对精油的影响，其次讨论了对酚类化合物的回收。

行业相关性

这项工作的完成归功于IFTS France的投资，该公司是在固液分离领域享誉全球的国际技术中心。考虑到大量植物提取物，这种利用微波和离心力（MW / C）的新组合系统可能适合扩大规模。对中试反应堆的研究结果为工业设备的设计铺平了道路。