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Ultrasonic-assisted supercritical fluid extraction method for essential oil in cape jasmine leaves

A supercritical fluid, ultrasonic-assisted technology, applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of poor water solubility, low extraction rate, high density of gardenia leaf essential oil, etc.

Inactive Publication Date: 2019-07-23
HUNAN UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have their own advantages and disadvantages. The steam extraction method is a more commonly used essential oil extraction method. The quality of the essential oil extracted by this method is high, and the original flavor of the essential oil can be well preserved. However, the essential oil of gardenia leaves has a high density and poor water solubility. The extraction rate of this method is low; the adsorption extraction method takes a long time and the extraction rate is not high

Method used

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  • Ultrasonic-assisted supercritical fluid extraction method for essential oil in cape jasmine leaves
  • Ultrasonic-assisted supercritical fluid extraction method for essential oil in cape jasmine leaves
  • Ultrasonic-assisted supercritical fluid extraction method for essential oil in cape jasmine leaves

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Experimental program
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Effect test

Embodiment 1

[0019] 1. Select clean gardenia leaves and freeze-dry them. The drying temperature is -40°C and the drying time is 24 hours. Then, the dried gardenia leaves are crushed with a pulverizer and sieved to 50-60 mesh;

[0020] 2. Weigh an appropriate amount of gardenia leaf powder and mix it with methanol at a ratio of 1:2 (g / mL), place it in a supercritical extraction kettle, and carry out circular extraction under the assistance of ultrasonic waves. The extraction time is 90 minutes, and the extraction temperature is 55°C ;

[0021] 3. After the extraction is completed, the extract is obtained through a separation tank, and concentrated in vacuo at 45° C. to obtain an essential oil mixture.

Embodiment 2

[0023] 1. Select clean gardenia leaves and freeze-dry them. The drying temperature is -50°C and the drying time is 24 hours. Then, the dried gardenia leaves are crushed with a pulverizer and sieved to 50-60 mesh;

[0024] 2. Weigh an appropriate amount of gardenia leaf powder and petroleum ether according to 1:0.8 (g / mL), mix evenly, place in a supercritical extraction kettle, and carry out circular extraction under the assistance of ultrasonic waves. The extraction time is 90 minutes, and the extraction temperature is 40 ℃;

[0025] 3. After the extraction is completed, the extract is obtained through a separation tank, and concentrated in vacuo at 40°C to obtain an essential oil mixture.

Embodiment 3

[0027] 1. Select clean gardenia leaves and freeze-dry them. The drying temperature is -40°C and the drying time is 24 hours. Then, the dried gardenia leaves are crushed with a pulverizer and sieved to 50-60 mesh;

[0028] 2. Weigh an appropriate amount of gardenia leaf powder and mix it with ethanol at a ratio of 1:1 (g / mL), place it in a supercritical extraction kettle, and carry out circular extraction under the assistance of ultrasonic waves. The extraction time is 60 minutes, and the extraction temperature is 45°C ;

[0029] 3. After the extraction is completed, the extract is obtained through a separation tank, and concentrated in vacuo at 55° C. to obtain an essential oil mixture.

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Abstract

The invention belongs to the technical field of biological extraction, in particular to an ultrasonic-assisted supercritical fluid extraction method for essential oil in cape jasmine leaves. The method comprises the following steps: 1, selecting clean cape jasmine leaves, performing freeze drying, then, crushing the dried cape jasmine leaves by a crusher, and sieving the obtained powder by a 50-60mesh sieve; 2, weighing a proper amount of cape jasmine leaf powder to be uniformly mixed with a carrying agent, placing the mixture in a supercritical fluid extraction kettle, and performing circulating extraction under assistance of ultrasonic waves at 30-70 DEG C for 30-180 min; 3, after extraction, obtaining an extraction liquid by a separation kettle, and performing vacuum concentration to obtain an essential oil mixture. Dissolution of effective ingredients of plants is reinforced under the cavitation effect of ultrasonic waves, and ultrasonic-assisted supercritical fluid extraction hasthe advantages of low extraction temperature, short time, high oil yield, energy-saving and the like. Fewer impurities such as colloid exist in an essential oil crude extract extracted by the petroleum ether carrying agent, an organic reagent is volatilized thoroughly, and the purity of the essential oil is higher.

Description

technical field [0001] The invention belongs to the technical field of biological extraction, and in particular relates to a method for extracting essential oil from gardenia leaves with ultrasonic-assisted supercritical fluid. Background technique [0002] Gardenia leaves are the leaves of Gardenia jasminoides of the Rubiaceae plant, also known as yellow branch leaves. Evergreen shrubs, opposite leaves, rarely papery, with various leaf shapes, mostly long garden-like lanceolate. It is mainly distributed in south-central and southwest my country, Jiangsu, Fujian, and Taiwan. Gardenia leaves taste astringent and bitter, cold in nature, have the effects of promoting blood circulation, reducing swelling, clearing away heat and detoxification, and are mainly used for bruises, furunculosis, hemorrhoids, chancre and other diseases. The chemical components in Gardenia leaves are extremely complex. So far, the compounds isolated and identified from Gardenia plants include iridoids...

Claims

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Application Information

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IPC IPC(8): C11B9/02
CPCC11B9/022C11B9/025
Inventor 刘凤英邓爱华王云谢鹏袁晓露柏珊珊陈婕刘康珂
Owner HUNAN UNIV OF ARTS & SCI
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