How to extract propolis how to extract propolis?

1. Alcohol extraction of propolis: Alcohol extraction is the most traditional method of propolis purification. Because most of the effective components of propolis (such as bioflavonoids) are insoluble in water, they must be extracted with alcohol. The content of effective components dissolved by this method is the most in the known extraction methods, and the highest content can reach 60%-70%. Therefore, among propolis products on the market, alcohol extraction is the most common.

2. Propylene glycol extraction method: The commonly publicized alcohol-free propolis actually uses propylene glycol instead of alcohol to dissolve propolis. The solubility of propylene glycol in propolis is worse than that of alcohol, which can reach 40% at present, but propylene glycol itself is viscous, so the content of effective components in propylene glycol propolis solution is low, but the viscosity is high.

3. Supercritical carbon dioxide extraction: put the original propolis block and edible alcohol into a container according to a certain proportion, soak, stir and filter impurities to obtain propolis solution. Put the original propolis block and edible alcohol into a supercritical liquid extraction tank according to a certain proportion, inject high-pressure liquid carbon dioxide, and set specific extraction process conditions to obtain purified and extracted propolis essence.