Method for extracting gardenia oil by using subcritical fluid

Abstract

The invention discloses a method for extracting gardenia oil by using a subcritical fluid. The method comprises the following steps: preprocessing a gardenia fruit raw material, and adding a metered amount of the preprocessed raw material to an extraction tank; inspecting the air tightness of the extraction tank, conveying liquid butane into the extraction tank according to a solid/liquid mass ratio of 1:4 in order to carry out extraction, carrying out four-stage extraction on every tank, respectively introducing a second stage extraction liquid, a third stage extraction liquid and a fourth stage extraction liquid to previous stage extraction, and separating a first stage extraction liquid, wherein extraction in each of the four stages is carried out for 2h; and introducing the first stage extraction liquid into an evaporator, carrying out reduced pressure evaporation exsolution to prepare crude gardenia oil, and purifying the crude gardenia oil to prepare a finished product. The method is used to efficiently extract gardenia oil in the gardenia fruit raw material, and has the advantages of low energy consumption, no pollution, high quality, and especially no destroys to natural heat-sensitive oxidizable active components in the gardenia oil.

Description

technical field [0001] The invention belongs to a method for extracting active ingredients from plant raw materials, in particular to a method for extracting gardenia oil with a subcritical fluid. Background technique [0002] Gardenia fruit is rich in gardenia oil, with an oil content of 17.6%, which is close to that of soybeans. The fatty acid composition of gardenia oil is relatively simple, mainly linoleic acid. Linoleic acid is one of the essential fatty acids in the human body. It cannot be synthesized in the human body and must be ingested from food. Linoleic acid can prevent atherosclerosis, reduce blood lipids and serum total cholesterol, prevent abnormal blood coagulation, soften blood vessels, It expands arteries, increases blood circulation, regulates the aging endocrine system of the heart, promotes blood circulation and removes blood stasis, indirectly restores nerve function, and has a good effect on cardiovascular diseases such as hypertension and coronary he...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low efficiency, poor safety, poor quality and low yield of gardenia oil extracted by traditional methods, the purpose of the present invention is to provide a method for extracting gardenia oil with subcritical fluid, which can efficiently extract gardenia The gardenia oil in the fruit raw material has low energy consumption, no pollution, and high quality, especially it will not destroy the natural heat-sensitive and easily oxidized active ingredients in the gardenia oil

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