Extraction and Purification Processes of Sinapic Acid Derivatives from Rapeseed and Mustard Seed By-Products

ABSTRACT By-products obtained through the industrial processing of rapeseed and mustard seeds are exploited as feed or methanization. However they contain high added value phenolic compounds, such as sinapic acid and its derivatives, that could be recovered by extraction and purification processes. This review presents the state of the art on such recovery processes. It covers conventional extraction by solvent and emergent extraction processes, namely solvent extraction assisted by ultrasound, microwaves, pressure, electro-technologies or enzymes. Concerning the purification processes, liquid-liquid extraction, adsorption and membrane filtration processes are commonly implemented. This article summarizes the most promising methods and technologies for developing sustainable processes for the recovery of sinapic acid derivatives from rapeseed and mustard seed by-products.