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Method for optimally extracting active matters from olive leaves by utilizing subcritical water

A technology for olive leaves and active substances, which is applied in the field of subcritical water to optimize the extraction of active substances from olive leaves, can solve the problems of long extraction time, change of active ingredients, and large amount of solvent used, and achieves a high-efficiency, fast, and environment-friendly solution. Effect

Inactive Publication Date: 2018-07-06
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional extraction techniques include solvent extraction and steam distillation. Solvent extraction methods commonly used in plant extraction include reflux method, Soxhlet method, cold soaking method, percolation method, etc. Reflux extraction and Soxhlet extraction require a long time Heating is very likely to change the active ingredients in the plant. The extraction time of cold soaking method and percolation method is longer, and the amount of solvent used is large.

Method used

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  • Method for optimally extracting active matters from olive leaves by utilizing subcritical water
  • Method for optimally extracting active matters from olive leaves by utilizing subcritical water
  • Method for optimally extracting active matters from olive leaves by utilizing subcritical water

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Experimental program
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Effect test

Embodiment 1

[0015] The first step, the preparation of olive leaf extract solution: take 5 g of olive leaf powder in the material basket in the extraction tank, under the conditions of temperature 130 ℃, extraction time 10 min, extraction pressure 4 Mpa, with different feed solutions The active substances of olive leaves were extracted, the extract was centrifuged and filtered to constant volume, and the content of polyphenols, flavonoids and oleuropein was measured to obtain the best solid-liquid ratio. In the second step, the extract was put into a freeze dryer, at -40°C, vacuum degree 1.48×10 -4 Dried to constant weight under MPa, the olive leaf active substance content is as follows:

[0016]

Embodiment 2

[0018] The first step, the preparation of olive leaf extract solution: take 5 g of olive leaf powder in the material basket in the extraction tank, under the conditions of extraction pressure of 4 Mpa, solid-liquid ratio of 1:40, and extraction time of 10 min, different The extraction temperature was used to extract the active substances of olive leaves, the extract was centrifuged and filtered to constant volume, and the contents of polyphenols, flavonoids and oleuropein were measured to obtain the best solid-liquid ratio. In the second step, the extract was put into a freeze dryer, at -40°C, vacuum degree 1.48×10 -4 Dried to constant weight under MPa, the olive leaf active substance content is as follows:

[0019]

Embodiment 3

[0021] The first step, the preparation of olive leaf extract solution: take 5 g of olive leaf powder in the material basket in the extraction tank, under the conditions of extraction pressure of 4 Mpa, solid-liquid ratio of 1:40, and extraction time of 20 min, different The active substances of olive leaves were extracted at a certain extraction time, the extract was centrifuged and filtered to constant volume, and the contents of polyphenols, flavonoids and oleuropein were measured to obtain the optimal solid-liquid ratio. In the second step, the extract was put into a freeze dryer, at -40°C, vacuum degree 1.48×10 -4 Dried to constant weight under MPa, the olive leaf active substance content is as follows:

[0022]

[0023] Comparing above-mentioned embodiment, the content of olive leaf active substance rises gradually, and embodiment 3 is best embodiment.

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Abstract

The invention discloses a method for optimally extracting active matters from olive leaves by utilizing subcritical water. The method is characterized in that the polarity of a common extracting solvent-water is changed by utilizing high temperature and high pressure, and a better extracting effect of the active matters in the olive leaves can be obtained. The method comprises the following basicsteps: smashing the olive leaves, thus obtaining olive powder of which the density is 20 to 80 meshes; adding the olive leaf powder and a certain proportion of deionized water into an extracting tankof a subcritical extracting device, and extracting for 10 to 60 minutes, thus obtaining an extracting solution; centrifuging, filtering and collecting the extracting solution; preparing the extractingsolution into extract powder after drying the extracting solution, and preserving the extract powder. The subcritical water is used as an extracting solvent, is natural and non-toxic and is low in cost. The method disclosed by the invention utilizes the subcritical water for extracting the active matters in the olive leaves, a preparation process is non-toxic, the method is environmentally friendly, and industrial production is easy.

Description

technical field [0001] The invention relates to the optimal extraction of active substances of olive leaves by a subcritical extraction technology, and the optimal extraction conditions of the active substances are obtained by changing different extraction conditions. Background technique [0002] The active ingredients of plant extracts can be basically divided into several categories such as phenols, alkaloids, volatile oils, flavonoids, organic acids, polysaccharides, tannins and plant pigments. These active substances have good effects in many aspects such as anti-oxidation, sterilization, anti-virus, anti-inflammation and growth promotion. Due to differences in plant species, extraction methods, harvest seasons, parts of use, and places of origin, the active ingredients of plant extracts vary greatly. [0003] Traditional extraction techniques include solvent extraction and steam distillation. Solvent extraction methods commonly used in plant extraction include reflux ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/63A61P39/06A61P29/00A61P31/04A61P31/10A61P31/12A61P35/00A61P3/10A61K127/00
CPCA61K36/63A61K2236/15A61K2236/37A61K2236/51A61K2236/53
Inventor 黄立新王晓杰张彩虹谢普军邓叶俊成江
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY