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Method for extracting flavonoids from roses

A technology of roses and flavonoids, applied in the field of plant extraction, can solve the problems of long distillation time, high temperature, easy decomposition and damage, etc., and achieve the effect of reducing interference

Inactive Publication Date: 2020-05-22
邹云付
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long distillation time and high temperature, and most of the distilled volatile oils have high boiling points; the amount of flavonoids extracted in aqueous solution is small, and they are easily decomposed and destroyed when extracted at high temperature for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Crush the dried roses into 10-mesh powder, wrap them with filter paper, put them in a Soxhlet extractor, add petroleum ether for continuous reflux extraction, and the color will no longer increase in the solvent, and put the extract in a rotary evaporator evaporate the organic solvent, then add distilled water to mix, co-distill with water, collect the volatile oil of roses, add anhydrous sodium sulfate for dehydration, and store in airtight storage at low temperature;

[0018] (2) After the organic solvent is evaporated from the rose medicinal dregs, add 8 times the amount of 50% ethanol, soak in a water bath at 60°C for 3 hours, extract twice, combine the filtrates, recover ethanol under reduced pressure, concentrate, freeze-dry and store in a sealed container to obtain Rose flavonoids, phenolic acids.

[0019] In step (1), the amount of distilled water added is 8 times the volume of the extract.

Embodiment 2

[0021] (1) Crush the dried roses into 80-mesh powder, wrap them in filter paper, put them in a Soxhlet extractor, add diethyl ether for continuous reflux extraction, the color will no longer increase in the solvent, and put the extract in a rotary evaporator The organic solvent was evaporated, then mixed with distilled water, co-distilled with water, the volatile oil of roses was collected, added anhydrous sodium sulfate for dehydration, and stored in a sealed container at low temperature;

[0022] (2) After the organic solvent is evaporated from the rose medicinal dregs, add 12 times the amount of 80% ethanol, heat reflux extraction for 40 minutes, extract 3 times, combine the filtrate, recover the ethanol under reduced pressure, concentrate, freeze-dry and store in an airtight manner to obtain roses flavonoids.

[0023] In step (1), the amount of distilled water added is 12 times the volume of the extract.

Embodiment 3

[0025] (1) Crush the dried roses into 10-mesh powder, wrap them with filter paper, put them in a Soxhlet extractor, add petroleum ether for continuous reflux extraction, and the color will no longer increase in the solvent, and put the extract in a rotary evaporator evaporate the organic solvent, then add distilled water to mix, co-distill with water, collect the volatile oil of roses, add anhydrous sodium sulfate for dehydration, and store in airtight storage at low temperature;

[0026] (2) After the organic solvent is evaporated from the rose medicinal dregs, add 6 times the amount of 50% ethanol, soak in a water bath at 60°C for 3 hours, extract twice, combine the filtrates, recover the ethanol under reduced pressure, concentrate, freeze-dry and store in a sealed container to obtain Rose flavonoids, phenolic acids.

[0027] In step (1), the amount of distilled water added is 8 times the volume of the extract.

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Abstract

The invention discloses a method for extracting flavonoids from roses. The method comprises the following steps: (1) crushing roses dried in the shade into powder of 10-80 meshes, wrapping the powderwith filter paper, putting the wrapped powder in a Soxhlet extractor, adding a low-boiling-point organic solvent, performing continuous reflux extraction until no increase of color in the solvent, putting the extract in a rotary evaporator, performing evaporation so as to remove the organic solvent, then adding distilled water, performing mixing, performing distillation with water, collecting roseessential oil, adding anhydrous sodium sulfate for dehydration, and performing sealed storage at low temperature; and (2) removing the organic solvent from the rose residues, adding 50%-80% ethanol with the amount of 8-12 times that of the residues, performing leaching 1-3 times, merging the filtrate, recovering the ethanol under reduced pressure, performing concentration and freeze drying, and performing sealed storage so as to obtain the flavonoids of roses. Since the solubility of flavonoids in ethanol is greater than the solubility of flavonoids in water, interferent is reduced after degreasing is conducted on the rose residues, and therefore the amount of the extracted flavonoids is nearly two times that of distillation residues.

Description

technical field [0001] The present invention relates to the technical field of plant extraction, in particular to a method for extracting flavonoids from roses. Background technique [0002] Rose is one of the famous flowers in the world, known as the "Queen of Flowers", and was honored as the "Flower of the Goddess" in ancient China. Rose belongs to Rosaceae. It is a deciduous shrub with dense stems and sharp thorns. It has both color and fragrance. It is an economical flower that integrates ornamental, edible and medicinal uses. Rose essential oil is the crown of flower oils. It has elegant, soft, delicate, sweet and honey-like rose fragrance. It has good effects on the respiratory system, digestive system, circulatory system and reproductive system. It has the effects of suppressing, decompressing, sleeping, anti-conflict, relieving tension and anti-depression in terms of emotions. It is expensive, and the international market price is comparable to that of Equivalent t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/738A61K133/00
CPCA61K36/738A61K2236/15A61K2236/331A61K2236/333A61K2236/35A61K2236/39
Inventor 不公告发明人
Owner 邹云付
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