Essential oil extraction and distillation is a relatively simple and easy method to extract essential oil. This is also the oldest and most widely used method. Most essential oils are extracted by distillation. The principle of distillation is to use the volatility of plant essential oil to convert liquid into gas by heating and then cool it into liquid. At the same time, the difference of specific gravity and density between volatile oil and water is decomposed into volatile oil and water in which saturated volatile oil is dissolved. There are many distillation methods.
Different plants have different distillation methods. Therefore, people have developed various distillation methods, which are generally divided into steam distillation and vacuum distillation. The extraction method is usually to extract some essential oils, such as lemon, orange, bergamot and grapefruit. This method is very operable in the family, but it requires a lot of pressure and labor intensity. This type of extraction is now mainly used for machine operation. Squeeze the water and essential oil in the peel, and separate the essential oil from the water by sponge adsorption or other means. Solvent extraction of essential oil is based on the principle that essential oil is in a certain liquid.
The material is placed in a corresponding solution, and the essential oil substance is completely dissolved in the extractant by heating. The solution is that the material is immersed in a container, heated in the container, and the aromatic substance is extracted from the ketone solution, filtered, gelatinized and evaporated to obtain the essential oil. This is how essential oils such as sandalwood, frankincense and myrrh are extracted.