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Supercritical CO2 extraction method for chimonanthus praecox essential oil

A carbon dioxide and supercritical technology, applied in essential oils/spices, fat production, etc., can solve problems such as high temperature, cooking odor of wintersweet essential oil, hidden dangers of organic solvent extraction, etc., to save resources, no safety hazards, and fast extraction speed Effect

Inactive Publication Date: 2014-09-10
HUBEI WULIUYUAN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for extracting wintersweet essential oil with supercritical carbon dioxide, which solves the problems of traditional steam distillation extraction, high temperature, cooking odor of wintersweet essential oil and hidden production problems of organic solvent extraction

Method used

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  • Supercritical CO2 extraction method for chimonanthus praecox essential oil

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Embodiment 1

[0009] Embodiment 1: a kind of method of supercritical carbon dioxide extraction wintersweet essential oil, get the wintersweet flower 100g that water content is 70% after pretreatment and put into extraction kettle, open carbon dioxide cylinder, carbon dioxide passes through condenser, high-pressure pump and heater successively Enter the extraction kettle to extract the wintersweet flower. The pressure in the extraction kettle is 20Mpa, the temperature is 45°C, and the flow of carbon dioxide is 25 kg / h; Two-stage decompression separation was carried out in the secondary analytical kettle, and the circulation time of carbon dioxide was 1.5 hours. The crude wintersweet essential oil was centrifuged by a centrifuge with a speed of 1000 r / min for 2 minutes, and finally 1.213 g of pure essential oil was obtained; The pressure in the first desorption tank is 6MPa and the temperature is 30°C, the pressure in the second desorption tank is 3MPa and the temperature is 25°C.

Embodiment 2

[0010] Embodiment 2: a kind of method of supercritical carbon dioxide extraction wintersweet essential oil, get the wintersweet flower 100g that water content is 70% after pretreatment and put into extraction kettle, open carbon dioxide cylinder, carbon dioxide passes through condenser, high-pressure pump and heater successively Enter the extraction kettle to extract the wintersweet flower. The pressure in the extraction kettle is 40Mpa, the temperature is 60°C, and the flow of carbon dioxide is 20 kg / h; Two-stage decompression separation was carried out in the second analytical kettle, the circulation time of carbon dioxide was 2 hours, and the crude wintersweet essential oil was centrifuged by a centrifuge with a speed of 1000 r / min for 2 minutes, and finally 1.258 g of pure essential oil was obtained; The pressure in the first desorption tank is 5MPa and the temperature is 30°C, the pressure in the second desorption tank is 5MPa and the temperature is 25°C.

Embodiment 3

[0011] Embodiment 3: a kind of method of supercritical carbon dioxide extraction wintersweet essential oil, get the wintersweet flower 100g that water content is 70% after pretreatment and put into extraction kettle, open carbon dioxide cylinder, carbon dioxide passes through condenser, high-pressure pump and heater successively Enter the extraction kettle to extract the wintersweet flower. The pressure in the extraction kettle is 30Mpa, the temperature is 30°C, and the flow rate of carbon dioxide is 30 kg / h; Two-stage decompression separation was carried out in the second analytical kettle, and carbon dioxide was added for separation. The circulation time of carbon dioxide was 2 hours, and the crude wintersweet essential oil was centrifuged by a centrifuge with a speed of 1000 r / min for 2 min. 1.116g of pure essential oil was obtained; the pressure in the first desorption tank was 8MPa and the temperature was 30°C, and the pressure in the second desorption tank was 1MPa and th...

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Abstract

The invention discloses a supercritical CO2 extraction method for chimonanthus praecox essential oil. The supercritical CO2 extraction method comprises the following specific steps: placing pretreated chimonanthus praecox containing 70% of water into an extraction kettle for extracting; controlling pressure, temperature, time and CO2 flow; then, separating an extracting solution in a two-stage analytic kettle to obtain crude chimonanthus praecox essential oil; finally, centrifuging to obtain pure essential oil. The problems that peculiar cooking smell is generated in extracting the chimonanthus praecox essential oil by using the traditional water vapor distillation method, an organic solvent is easy to remain in a product if an organic solvent extraction method is used and potential safety hazards exist in the production process are solved. According to the invention, the natural fragrance of chimonanthus praecox is remained in the essential oil, and the essential oil can be used as a high-grade essence with high added value; in addition, no organic matters are remained in the essential oil, and no potential safety hazards exist in the production process.

Description

technical field [0001] The invention relates to a method for extracting wintersweet essential oil, in particular to a method for extracting wintersweet essential oil with supercritical carbon dioxide. Background technique [0002] Wintersweet (Chimonanthus praecox (linn.) Link) is a deciduous shrub of the genus Chimonanthus praecox (linn.) Link. It is a traditional garden flower and landscaping plant in my country. It has excellent ornamental value in color, fragrance, shape, posture and rhyme. Wintersweet flower has high medicinal and health care value except sending out the fragrance of Qingxin. [0003] Wintersweet flower contains volatile aromatic oil substances, which is a flavor raw material with great development potential. The extraction methods of wintersweet essential oil reported in the literature are mainly steam distillation and organic solvent extraction. Steam distillation requires less equipment and is simpler to operate. However, due to the adverse effects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
Inventor 楼汉华田耀庆
Owner HUBEI WULIUYUAN BIOLOGICAL TECH
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