Preparation Method Of Rosemary Extract

At present, the main methods for extracting rosemary essential oil are: steam distillation, ultrasonic-assisted extraction, supercritical CO2 fluid extraction, etc. Steam distillation has the advantages of low cost, simple operation, and no solvent pollution. Therefore, steam distillation is often used in industry to extract rosemary essential oil. Ultrasonic-assisted extraction can promote extraction and shorten extraction time. Supercritical CO2 fluid extraction technology is used to extract Algerian rosemary essential oil with a high yield. Rosemary essential oil and antioxidants such as caryophyllene and rosmarinic acid can be extracted from rosemary branches and leaves. Compared with the series of side effects caused by the use of artificial synthetic antioxidants, natural antioxidants extracted from rosemary have significant advantages, such as safety, high efficiency, and high temperature resistance. The application research of rosemary antioxidants in food and daily chemical industry has also become a research hotspot in recent years. The components of rosemary essential oil are extracted, and the antioxidant properties are studied with vitamin C as a comparison object. In order to promote the extraction of effective ingredients of rosemary and the development of antioxidants.