**5.2 Effleurage (extraction with cold fat)**

Enfleurage is the method of extracting aroma from flowers by absorbing it through contact with cold lipids. This method is used for fragrant flowers like jasmine and tuberose, which retain their unique aroma even after being plucked. To prevent

fat odors from entering, fats should be saturated and odorless. It's best to use refined lard or beef suet. On both sides of a glass plate mounted on a rectangular hardwood frame or chassis, fat is thinly deposited. On a fat-coated chassis, fresh aromatic flowers are delicately stacked. Enfleurage produces far more floral oil than other processes.

#### **5.3 Ultrasound extraction**

Ultrasound extractions can now be finished in minutes with high reliability, reducing solvent consumption, clarifying control and work-up, improving final product purity, removing wastewater after treatment, and consuming only a fragment of the fossil energy required for a traditional extraction method [35]. USAE (ultrasound-assisted extraction) has been used to extract polyphenols from vegetable tissues, protein, sugar, and starch from cereals and legumes, oil, and flavor components. Extraction efficiency and rate are improved by sonication. It lowers the required temperature, saves solvents, and promotes the solubilization of the desired chemicals. Solubility is enhanced by a significant increase in the very temperature [36].

To extract phytochemicals from plants, both the cell wall and the cell membrane must be broken. Because of this, ultrasounds are used in ultrasound-assisted extraction for cell disintegration. Ultrasounds are sound waves that are above the human hearing range, with frequencies ranging from 20 kHz to a few gigahertz. Plant materials and liquids absorb the energy emitted by ultrasonic waves and convert it to heat. The frequency, intensity, and duration of ultrasonic therapy affect the amount of heat created in plant materials [37]. This heat energy debases proteins, destroys plant cells, and causes therapeutic substances to be released from plant cells. In most cases, the highest extraction rate is attained in the initial few minutes, which is also the most profitable time [38].
