Patchouli oil is highly recommended in fragrance and cosmetic industries. Patchouli alcohol is the main component as well as the prime reason for the classical aroma of the oil. An intensified concept of aiding hydrodistillation with sonication, a green concept, has been incorporated to maximize the yield of patchouli oil. With the help of Taguchi method, the screening of extraction parameters, viz., extraction time, solid loading, particle size, heating mantle power, sonication amplitude and pulse ratio was carried out while optimization was accomplished by Box-Behnken design. The highest yield (2.05%, w/w) was acquired under optimum conditions, i.e., 30% amplitude, 500 W power and 20 g solid loading. A comparative study of different techniques as well as parts of plant suggested sonohydrodistillation to be the suitable option for isolating the oil from the leaves of patchouli. GC–MS has shown the oil to be a combination of number of sesquiterpenes hydrocarbons as well as oxygenated compounds. The morphological changes in the plant material were studied using scanning electron microscope. Eventually, sonohydrodistillation has reduced the extraction time and improved the yield while maintaining the quality of the oil, hence a symbiotic effect of hydrodistillation with ultrasound was achieved. Furthermore, an evaluation of the electricity consumption and the environmental impact of sonohydrodistillation method for the extraction of the patchouli oil from the patchouli leaves indicated that the method can be considered as a green technique.

广藿香油被强烈推荐用于香水和化妆品行业。广藿香醇是该油经典香气的主要成分和主要原因。一个强化的概念是通过超声处理来辅助加氢蒸馏，这是一个绿色概念，已被纳入以最大限度地提高广藿香油的产量。借助田口法对提取参数进行筛选，即提取时间、固载量、粒径、加热套功率、超声振幅和脉冲比，并通过Box-Behnken设计进行优化。在最佳条件下获得最高产率（2.05%，w/w），即30% 振幅、500 W 功率和20 g 固体负载。对不同技术以及植物部分的比较研究表明，声水蒸馏是从广藿香叶中分离油的合适选择。GC-MS 表明该油是多种倍半萜烃和含氧化合物的组合。使用扫描电子显微镜研究植物材料的形态变化。最终，超声加氢蒸馏减少了提取时间，提高了产量，同时保持了油的质量，因此实现了加氢蒸馏与超声的共生效应。此外，对声水蒸馏法从广藿香叶中提取广藿香油的电力消耗和环境影响的评估表明，该方法可以被认为是一种绿色技术。