Heat reflux extraction

Heat reflux extraction is a much preferred technique as compared to percolation and decoction as it requires less extraction time and solvent (Zhang et al. 2018b). The technology involves heating the matrix for a particular time, leading to a complex chemical reaction. As the process uses reflux extractor as the main reactor, better mass transfer and contact efficiency are achieved between solvent and treated matrix (Tian et al. 2016). The vapor trickles down to the flask, thus controlling the temperature of the reaction. The technology has been preferred due to its simplicity and easy operation (Zhang et al. 2018a). The technology has found application in extracting many natural, phytochemical compounds and essential oils (Gao and Liu 2005; Aliboudhar and Tigrine-Kordjani 2014).