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Method for preparing gardenia essence by subcritical extraction and molecular distillation coupling

A gardenia essential oil and molecular distillation technology, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of adverse effects of organic solutions, poor aroma, low yield, etc., and achieve no solvent residue, short process route, and easy extraction high rate effect

Active Publication Date: 2015-12-09
康鸿生物科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing method for extracting gardenia essential oil is to extract fresh gardenia with petroleum ether to make gardenia extract, add 3 to 6 times of ethanol, cool and filter to remove insoluble wax, and then cool to - 15-25°C, then filter to remove wax, ethanol solution is distilled under reduced pressure to remove ethanol, and the essential oil is obtained, and the yield is usually 0.05-0.06%. The disadvantage of this method is that the aroma is poor, the color is darker, and the yield is relatively low. Low, and the residual organic solution will have adverse effects on the human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After removing impurities, the gardenia flowers are crushed to obtain the extraction raw materials, which are put into an extraction kettle, and propane is injected into the extraction kettle to mix with the gardenia fresh flowers raw materials. The mass volume ratio of propane and raw materials is 1:5 to 1:8 (g: mL), under the conditions of extraction temperature 30-50°C and extraction pressure 0.6-0.8Mpa, extract 2-3 times, each time for 0.5-1.0h. After the extraction, propane carrying gardenia oil is transported to the separation kettle Then carry out vacuum evaporation to fully vaporize the propane. During the evaporation process, the temperature is controlled at 30-50°C. After the recovery of propane is complete, the extracted crude gardenia oil is released from the bottom of the separation kettle, and the yield is 1.05-1.72 %; Gained crude gardenia oil, add ethanol with a mass volume ratio of 1:5 to 1:20 for sedimentation, centrifuge at 5000 to 10,000 rpm / min for 1...

Embodiment 2

[0025] Crush gardenia flowers, soak them in 15% to 20% salt water with a mass volume ratio of 1:5 to 10, ferment naturally at room temperature for 2 to 7 days, squeeze and filter to remove the salt water, put them into an extraction kettle, and inject butane for extraction The kettle is mixed with the raw materials of jasmine flowers, the mass volume ratio of butane to raw materials is 1:5~1:8 (g:mL), and the extraction temperature is 30~50°C, and the extraction pressure is 0.6~0.8Mpa to extract 2~ 3 times, 0.5~1.0h each time. After the extraction, the butane carrying gardenia oil was transported to the separation kettle, and then evaporated under reduced pressure to fully vaporize the butane. During the evaporation process, the temperature was controlled at 30~ 50°C, after the recovery of butane is complete, release the extracted crude gardenia oil from the bottom of the separation tank, the yield is 1.05-1.72%; the obtained crude gardenia oil is added in a mass volume ratio o...

Embodiment 3

[0027] After removing impurities, the gardenia flowers are crushed, put into an extraction kettle, and isobutane is injected into the extraction kettle to mix with the raw materials of gardenia flowers, and the mass volume ratio of isobutane to raw materials is 1:5 to 1:8 (g: mL), under the conditions of extraction temperature 30-50°C and extraction pressure 0.6-0.8Mpa, extract 2-3 times, 0.5-1.0h each time, after the extraction, transport the isobutane carrying gardenia oil to In the separation tank, then carry out vacuum evaporation to fully vaporize the isobutane. During the evaporation process, the temperature is controlled at 30-50 ° C. After the recovery of isobutane is complete, the extracted crude gardenia oil is released from the bottom of the separation tank. Yield is 1.05~1.72%; Gained crude gardenia oil, add the ethanol that mass volume ratio is 1:5~1:20 and carry out sedimentation treatment, centrifuge 10~20min under 5000~10000rpm / min, remove precipitation, filtrat...

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PUM

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Abstract

The invention relates to a method for preparing gardenia essence by subcritical extraction and molecular distillation coupling. Gardenia is used as a raw material, and the method comprises the following steps: (1) drying and smashing fresh gardenia, or fermenting the fresh gardenia by saline water for pretreatment; (2) performing subcritical extraction on the pretreated gardenia to obtain gardenia oil; (3) adding ethyl alcohol or acetone into the gardenia oil for dewaxing; (4) performing short-range molecular distillation on the gardenia oil subjected to dewaxing to obtain the gardenia essence. The technical line of the method is simple, the yield is high, the product quality is high, and the method is suitable for expanded production.

Description

technical field [0001] The invention belongs to the field of extracting essential oils from plants, relates to a preparation process for preparing gardenia essential oil by coupling subcritical extraction and molecular distillation, and belongs to the field of natural extracts. technical background [0002] Gardenia (Gardenia jasminoides Ellis), belonging to Rubiaceae Gardenia, is a small evergreen shrub. Gardenia is born in the mountains and has strong adaptability. It is mainly distributed in tropical and subtropical regions. Gardenia is a fragrant flower plant of the Rubiaceae Gardenia genus. It has strong cultivation adaptability, white flowers and strong aroma. It is one of the eight famous fragrant flowers in my country. Gardenia is a precious natural spice. The active ingredient gardenia essential oil is used in various products as a high-end spice. It has the effects of clearing away heat and purging fire, treating fever, reducing stress, and moisturizing the skin. ...

Claims

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Application Information

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IPC IPC(8): C11B9/02
Inventor 王成章陈虹霞周昊陶冉李文君叶建中
Owner 康鸿生物科技集团有限公司
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