Supercritical CO2 extraction process of onion oil

An extraction process, a technology for onion oil, applied in the fields of edible oil/fat, food science, application, etc., can solve the problems of excessive destruction of active substances, poor quality of onion oil, low extraction rate, etc., to achieve high product quality, energy saving, High extraction efficiency

Inactive Publication Date: 2011-05-04
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of supercritical CO 2 A systematic process for extracting onion oil, which solves the short

Method used

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  • Supercritical CO2 extraction process of onion oil
  • Supercritical CO2 extraction process of onion oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 80g of freeze-dried onion powder and put it into HA231-50-06 supercritical CO 2 Fluid extraction device (manufactured by Huaan Supercritical Extraction Company, Nantong City, Jiangsu Province), adjust the extraction pressure to 20Mpa, the extraction temperature to 40°C, add entrainer anhydrous ethanol 0.15mL / g, CO 2 The flow rate is 22L / h, the extraction time is 4h, the separation pressure I is 8MPa, and the temperature is 40°C; the separation pressure II is 6MPa, and the temperature is 35°C. The extract is collected at the outlet of the extraction kettle to obtain crude onion oil. The crude product was extracted three times with dichloromethane at a volume ratio of 1:1 at 25° C., recovered at 42° C., and the remaining water was removed with anhydrous sodium sulfate to obtain 0.392 g of refined onion oil.

Embodiment 2

[0020] Weigh 60g of freeze-dried onion powder and put it into HA231-50-06 supercritical CO 2 Fluid extraction device (manufactured by Huaan Supercritical Extraction Company, Nantong City, Jiangsu Province), adjust the extraction pressure to 20Mpa, extract the temperature to 45°C, add entrainer anhydrous ethanol 0.10mL / g, CO 2 The flow rate is 22L / h, the extraction time is 3h, the separation pressure I is 8MPa, and the temperature is 40°C; the separation pressure II is 6MPa, and the temperature is 35°C. The extract is collected at the outlet of the extraction kettle to obtain crude onion oil. The crude product was extracted three times with dichloromethane at a volume ratio of 1:1 at 25°C. The dichloromethane was recovered at 42°C, and the remaining water was removed with anhydrous sodium sulfate to obtain 0.228 g of refined onion oil.

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Abstract

The invention relates to a supercritical CO2 extraction process of onion oil, which adopts the following raw materials and comprises the following steps of: extracting freeze-dried onion powder (moisture content is 6% and particle size is 20-40 meshes) under the conditions that the extraction pressure is 20 MPa, the extraction temperature is 40 DEG C, the extraction time is 4 h and 0.15 mL/g absolute ethyl alcohol is added as an entrainer to obtain the crude product of onion oil, extracting the crude product for three times according to the volume ratio of 1:1 under the condition of 25 DEG C, recovering dichloromethane under the condition of 42 DEG C, and removing residual water by using anhydrous sodium sulfate to obtain refined onion oil. The yield rate of onion oil is 0.42-0.49%, and the onion oil is fawn-colored and has fresh onion flavor.

Description

1. Technical field [0001] Supercritical CO of the present invention 2 The technology for extracting onion oil belongs to the technical field of food processing and is specially used for deep processing of onion oil. 2. Background technology [0002] Modern medicine has proved that onions have anti-inflammatory and antibacterial effects, prevent cardiovascular diseases, reduce blood clots, lower blood lipids, lower blood pressure, lower blood sugar, and reduce arteriosclerosis. Onion oil extracted from onions has been listed as the main raw material of anti-AIDS medicines in the United States, Japan, Switzerland, and France. Japan and other countries have made the research on hypoglycemic factors in onions the top of the top 10 recent functional food research topics. propose. However, in fresh onions, the onion oil content is only 0.04%-0.05% of the fresh weight, and the amount of onion ingested in the daily diet is difficult to exert ideal physiological effects. Therefore,...

Claims

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Application Information

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IPC IPC(8): A23D9/04
Inventor 叶春林毛建卫赖依峰刘宣淦黄琦
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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