Chrysanthemum absolute oil extracted by using subcritical fluid low-temperature process

Abstract

The invention discloses chrysanthemum absolute oil extracted by using a subcritical fluid low-temperature process. The chrysanthemum absolute oil is extracted by adopting the following steps of: placing chrysanthemum raw materials in an extracting tank, vacuumizing the extraction tank until the vacuum degree in the extracting tank is more than 0.07MPa, stopping vacuumizing, adding a main solvent of subcritical dimethyl ether fluid in the extracting tank for reflux extraction, wherein the adding quantity of the main solvent is 2-10 times the weight of the chrysanthemum raw materials, the extracting conditions comprise the temperature of -10-30 DEG C, the pressure of 0.1-0.9MPa and the time of 1-5h; after the extraction is ended, introducing an extraction solution to a separating tank to ensure that the dimethyl ether solvent is decompressed and gasified to be separated from a chrysanthemum crude extract; making the separated solvent enter a storage and collection tank after being compressed and cooled; when the pressures of the extraction tank and the separating tank drop to zero, remaining for 5-10min, opening the separating tank for receiving the chrysanthemum crude extract; and removing water from the chrysanthemum crude extract by using an oil-water separator to obtain a chrysanthemum extract, adding 95 percent alcohol which accounts for 5-20 times the weight of the chrysanthemum extract, stirring and uniformly dissolving, freezing for 5-15h at the temperature of -5 to -20 DEG C, leaching and concentrating to obtain the chrysanthemum absolute oil.

Description

technical field [0001] The invention relates to the technical field of extracting flavors and fragrances in natural plants, in particular to extracting chrysanthemum absolute. Background technique [0002] Among the natural spice plant resources, chrysanthemum ( Chrysanthemum morifolium Ramat. ) is a plant of the genus Chrysanthemum in the Compositae family. It not only has a long history of being used as medicine, but also is loved by Chinese people for its delicate fragrance and elegant charm, and is widely used in health-care tea. The aroma of chrysanthemum is fresh and elegant, with a long artistic conception. It has a good compatibility in the fragrance and rhyme. The rhyme is elegant, natural and soft, and the aroma is relatively elegant. At present, most of these fragrance-type Compositae plants are limited to medicinal research and commercial production of essential oils, and most of them use traditional processes such as steam distillation and organic solvent extra...

AI Technical Summary

Problems solved by technology

At present, most of these fragrance-type Compositae plants are limited to medicinal research and commercial production of essential oils, and most of them use traditional processes such as steam distillation and organic solvent extraction. These processes have higher extraction temperatures and more loss of aroma components. , affecting product quality