Method for extracting peony essence from fresh peony flowers

Abstract

The invention belongs to the field of extraction of plant essential oil and in particular discloses a method for extracting peony essence from fresh peony flowers. The method comprises the following steps: performing supercritical CO2 extraction on the fresh peony flowers as raw materials to prepare peony extract, and extracting the peony extract to obtain the peony essence by employing a molecular distillation method. According to the method, since the fresh peony petals are taken as the raw materials, the spice components, thermal-sensitive substances and other active ingredients in the peony petals are maintained to the greatest extent, desensitization treatment is performed in the extraction process of essential oil, the condition that some people have pollen allergy is avoided; since the peony essential oil is extracted through the supercritical CO2 extraction method, the phenomenon that the thermal-sensitive substances in the peony flowers are lost because of heating in the traditional method is avoided; and meanwhile, the residue problem of the harmful substances caused by extraction by employing an organic solvent and the treatment and recovery problems of the organic solvent are solved, the environmental pollution is reduced, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of extracting essential oil from plants, and relates to a method for extracting peony essential oil from peony flowers. [0002] Background technique [0003] Peony flower is large and beautiful, elegant and luxurious, and is known as the king of flowers. Because peony blooms once a year, the flowering period is only one week, and the petals are delicate. After harvesting, it is easy to mold and difficult to preserve. The production has brought many difficulties. The plant essential oils currently on the market are compounded by essential oils and chemical additives; essential oils are plant volatile oils, which contain very little in plants and are expensive. Direct use is easy to damage the body. Pure plant essential oils have a small molecular weight , volatile, non-moisturizing, high-priced plant essential oils are mostly hyaluronic acid with moisturizing factor added, middle and low price are mostly chemically sy...

AI Technical Summary

Problems solved by technology

The shortcoming of this method is: in the process of adopting sodium chloride to pickle the peony petals, the original fragrance composition in the peony petals may be lost, and in this method, the organic solvent ethyl acetate is used, the organic solvent may be There are residues in some products, and the organic solvent must be refluxed and recovered during the production process, which consumes a lot of energy, the process is complicated, and there are unsafe factors

[0006] CN102391913A discloses a supercritical extraction method of peony essential oil, the steps of which are: cleaning and removing impurities, drying until its moisture content is less than 7%, pulverizing, Then through supercritical carbon dioxide extraction, the disadvantage of this method is: instead of using freshly picked peony flowers as raw materials, the roots, stems, leaves and flowers of peony are dried and then processed. Sensitive substances are destroyed, low-boiling aroma components volatilize, thus affecting the quality of the product

This process retains the original fragrance components of peony to the greatest extent, but it consumes too much energy, which is not conducive to the promotion of industrial production

[0008] In the above-mentioned peony flower essential oil extraction method, peony petals are used as raw materials, or peony petals after drying are used as raw materials, and whether peony petals are in the growth process In the process of picking or picking, pollen will inevitably fall, and some people are allergic to peony pollen. If the peony pollen cannot be completely eliminated, the pollen will follow the extraction process of peony essential oil, no matter what kind The peony essential oil extracted by the method may contain residual peony pollen, so that people who are allergic to peony pollen are also allergic to peony essential oil