Supercritical carbon dioxide mugwort active substance extracting method

A carbon dioxide and supercritical technology, applied in the field of extraction and separation technology, achieves the effects of reducing energy consumption, high efficiency, and safe and reliable production

Inactive Publication Date: 2005-05-04
TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to literature search, there is no method for extracting volatile oils and other effective substances in Artemisia argyi leaves by supercritical carbon dioxide so far.

Method used

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  • Supercritical carbon dioxide mugwort active substance extracting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Example 1: Put 1 kg of mugwort leaf fragments that were dried with hot air and chopped into 3 mm into an extraction tank, and carry out supercritical carbon dioxide extraction under the conditions of a pressure of 16 MPa and a temperature of 45° C. Adjust the pressure of the primary separation tank to 7MPa, the temperature is 45°C, the pressure of the secondary separation tank is 5MPa, the temperature is 50°C, the flow rate of carbon dioxide is 30kg / h, and after 4 hours of extraction, 25.6 mugwort leaf oil can be obtained from the primary separation tank g, 2.7g of Artemisia argyi oil mixture was obtained in the secondary separation tank, and the total yield was 2.83%.

Embodiment 2

[0025] Example 2: Put 1 kg of mugwort leaf fragments dried in the shade and chopped into 1 mm into an extraction tank, and carry out supercritical carbon dioxide extraction at a pressure of 25 MPa and a temperature of 35° C. Adjust the pressure of the first-stage separation tank to 10MPa, the temperature to 40°C, the pressure of the second-stage separation tank to 6MPa, the temperature to 50°C, the pressure of the third-stage separation tank to 4MPa, the temperature to 50°C, and the flow rate of carbon dioxide to 15kg / h, after 2 hours For the extraction, 17.2 g of the mugwort leaf oil can be obtained from the first-stage separation tank, 2.9 g of the mugwort leaf oil mixture can be obtained from the second-stage separation tank, and 0.6 g of the mugwort leaf oil mixture can be obtained from the third-stage separation tank, with a total yield of 2.07%.

Embodiment 3

[0026] Embodiment 3: put 1kg into the extracting tank through drying, pulverizing into 0.5mm mugwort leaf velvet, carry out supercritical carbon dioxide extraction under the condition that the pressure is 20Mpa and the temperature is 40°C, and the extraction entrainer adopts 95% ethanol 100g. Adjust the pressure of the primary separation tank to 8MPa, the temperature to 45°C, the pressure of the secondary separation tank to 5MPa, the temperature to 50°C, and the flow rate of carbon dioxide to 10kg / h. After 1 hour of extraction, Artemisia argyi oil 23.9 can be obtained from the primary separation tank g, 2.5g of Artemisia argyi oil mixture was obtained in the secondary separation tank, and the total yield was 2.64%.

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Abstract

The present invention discloses a method for extracting effective substance of mugwort leaf by utilizing supercritical Co2 extraction process. Said invention uses the supercritical CO2 as extracting agent, and utilizes the crushed or pulverized or floss-like raw material mugwort and makes said raw material mugwort undergo the processes of forward and backward circulation extraction, makes the CO2 richly containing target extract substance undergo the one-stage or more than one-stage reduced pressure resolving separation process and makes the separated CO2 continuously implement supercritical extraction circulation so as to obtain its effective substance, namely mugwort volatile oil or mugwort volatile oil mixture. Its extraction speed is quick, process is simple and operation is convenient.

Description

technical field [0001] The invention relates to a method for extracting effective substances of mugwort by supercritical carbon dioxide, specifically, an extraction and separation technology for extracting effective substances from mugwort by using a fluid of carbon dioxide in a supercritical state as an extraction agent. Background technique [0002] Artemisia argyi is derived from Artemisia argyi Levl.et Vant., a plant of the Compositae family. The "Chinese Pharmacopoeia" 2000 edition records that the dry leaves of its aerial part are mainly used, which is called Artemisia argyi. Artemisia argyi has a specific aroma, bitter, pungent, slightly warm in nature, and has the effects of dispelling cold and dehumidification, warming the meridian and stopping bleeding. Indications for cold pain in the lower abdomen, irregular menstruation, cold uterine infertility, vomiting blood and epistaxis, metrorrhagia, bleeding during pregnancy, skin itching and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02
Inventor 方建国汤杰施春阳王文清马永贵
Owner TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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