Coral dealbatus essential oil and preparation method thereof

The invention provides coral dealbatus essential oil and a preparation method thereof, and belongs to the technical field of essential oil extraction. The preparation method of the coral dealbatus essential oil provided by the invention comprises the following steps: mixing crushed coral dealbatus with absolute ethyl alcohol, heating, cooling and soaking, then carrying out solid-liquid separation, and circulating the heating, cooling and soaking for 2-4 times; carrying out heating reflux extraction on the liquid subjected to solid-liquid separation for 60-100 minutes to obtain a recovered liquid; and carrying out supercritical extraction on the recovered liquid by using carbon dioxide, and collecting volatile oil to obtain the coral dealbatus essential oil. Through optimization of the preparation process, the amounts of palmitic acid, linoleic acid, alpha-linolenic acid and other components in the obtained coral dealbatus essential oil are greatly increased compared with the prior art, and the use value of th