Traditional and Modern Methods of Flower Extraction

Flower extraction methods have evolved from traditional to newer developments to yield essential oils, aromas, and bioactive molecules. Traditional methods include steam distillation, enfleurage, maceration, decoction, percolation, and infusion, which have been employed for centuries. Steam distillation separates volatile constituents by the use of steam or water, but it may ruin heat-sensitive components. Enfleurage maintains delicate floral fragrances through the use of fats, and maceration involves immersing flowers in oils to extract aromatic molecules. Solvent extractions utilize organic solvents to produce highly concentrated absolutes. Decoction is the process of boiling water with flowers to release bioactive compounds. Percolation, on the other hand, continuously passes a solvent through a packed bed of flowers, ensuring effective extraction. Infusion extracts delicate bioactive compounds, making it a valuable ingredient in herbal teas, cosmetics, and pharmaceuticals. These operations are typically lengthy, consume bulk raw materials, and are less efficient. New technologies, such as microwave-assisted extraction, ultrasonic-assisted extraction, and supercritical fluid extraction, are generally inefficient, time-consuming, and require large quantities of raw material. New technologies, such as supercritical fluid extraction, ultrasound-assisted extraction, and microwave-assisted extraction, enhance efficiency and sustainability. Supercritical fluid extraction, which utilizes CO 2 significantly, provides a high-purity extract with no trace of solvent residue. Ultrasound extraction increases yield through cell destruction of plants, while microwave extraction increases extraction time by inducing quick heat. The advantages of such extraction processes include cell destruction, reduced processing time, increased yield, and minimized environmental impact. The current book chapter presents the conventional and new flower extraction technologies in the context of the extract's efficiency, sustainability, and quality. The knowledge of these processes enables companies to streamline high-quality floral essences processes in a sustainable manner.