Extraction agent used for extracting proanthocyanidin from plants and extracting method

A proanthocyanidin and extraction agent technology, applied in the field of natural product extraction, can solve the problems of high production cost of deoxygenated water, low extraction rate, complicated process, etc., and achieve the effect of no extractant residue, short process flow and high extraction rate

Inactive Publication Date: 2003-07-23
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is beneficial to prevent the oxidation and loss of activity of proanthocyanidin oligomers, but the production cost of deoxygenated water is high and the dosage is large, and the method still has the defects of complicated process and low extraction rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The composition and proportion of the extractant (calculated by weight) metaphosphoric acid 0.2; sulfite 0.4; water 500. The pH is 4.9, and the water is drinking water, and its pH value is neutral.

[0032] Clean the lotus pod (removed seeds), filter the water without crushing, directly take 2000g of the material and put it into the extraction tank, add 5500kg of extraction agent, cover and seal it, the extraction temperature is 90°C, the pressure: normal pressure; stir and extract for 2 hours , stirring intermittently for 0.5-1 minute every half hour, opening the lid to remove the slag. The feed liquid is coarsely filtered with a centrifugal filter to remove impurities below 20 mesh, finely filtered with a sand filter to remove impurities below 200 mesh, and cooled to 30°C.

[0033] The feed liquid flows through the resin adsorption column at a flow rate of 2000kg / hour, and then the impurities that are not adsorbed are washed with water, and the resin adsorption colum...

Embodiment 2

[0035] Composition and ratio of extractant (calculated by weight): sulfite 0.8; water 500; pH 5.5.

[0036] Take dried lotus seed husks, clean them, filter water, take 500kg of materials, put them into the extraction tank, add 7000kg of extraction agent, cover and seal, fill the extraction tank with nitrogen, temperature 80°C, stir intermittently for 0.5-1 minute per hour, soak Lift for 6 hours, open the cover to remove the slag, and keep the feed liquid.

[0037] The feed liquid is coarsely filtered with a centrifugal filter, finely filtered with a sand filter, and cooled to 40°C; still adopt the resin purification in Example 1, ethanol elution, and concentration steps, and the concentrated solution can be freeze-dried to obtain 23kg of proanthocyanidin extract. The purity is 96.4%.

Embodiment 3

[0039] Extractant composition and ratio (calculated by weight): metaphosphoric acid 1; water 500; pH 2.9.

[0040] Take 200kg of clean grape seeds without crushing, add 2000kg of extractant, temperature 60°C; normal pressure; fill with nitrogen, extract for 17 hours, and stir intermittently for 1 minute every hour. The following process is the same as before, and vacuum drying can be used to obtain procyanidins. Product 10.6kg, its purity is 95.2%.

[0041] Invention effect

[0042] The extraction agent of the invention has low cost, high extraction rate and no environmental pollution. Adapt to a wide range of plant materials. At the same time, the extractant of the present invention can also be used in other processes for extracting proanthocyanidins other than the present invention.

[0043] The extraction method in the present invention has short technological process, less equipment investment, and is easy to maintain the activity of procyanidin oligomers. The purity of...

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Abstract

An extractant for extracting proanthocyanidin from plant is metaphosphoric acid and / or sulfite. Its extracting process includes adding water to prepare solution, regulating pH value, immersing extracting by controlling temp and time, filtering, purifying, solvent eluting, concentrating and drying. Its advantages are dosage of extractant, high extracting rate and high purity and water solubility of product.

Description

technical field [0001] The invention belongs to the technical field of natural product extraction, and in particular relates to the invention of a water-based extraction agent and a water extraction method for extracting proanthocyanidins from plant materials. technical background [0002] Proanthocyanidin (Proanthocyanidin) widely exists in the leaves and seeds of plants, such as ginkgo biloba, tea leaves, grape seeds are relatively rich, most of the industry uses waste from the wine brewing industry, such as grape seeds and skins as the main source of proanthocyanidin extraction raw material. The extraction method has an organic solvent method. The extraction process of this method is complicated, and multiple organic solvents (such as sherwood oil, ethyl acetate, etc.) are used in the process, which has high energy consumption and environmental pollution, and the organic solvent remains in the final extraction. In the product, it affects the quality and use of proanthocy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/62
Inventor 谢笔钧杨尔宁凌智群刘睿孙智达王可兴潘思轶
Owner HUAZHONG AGRI UNIV
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