Method for extracting proanthocyanidin from pine bark by taking water as solvent

A technology of proanthocyanidins and pine bark, applied in the direction of organic chemistry, etc., can solve the problems of poor product safety, high production cost, complicated extraction process, etc., and achieve the effects of less loss, no chemical residue, and high extraction efficiency.

Inactive Publication Date: 2010-05-05
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of complicated extraction process, high production cost and poor product safety in th

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  • Method for extracting proanthocyanidin from pine bark by taking water as solvent
  • Method for extracting proanthocyanidin from pine bark by taking water as solvent

Examples

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Example Embodiment

[0021] Example 1

[0022] Weigh 100g of clean, decayed and moldy pine bark, crush it to 60 mesh, add 1000mL of distilled water, perform ultrasonic extraction for 30min under the conditions of ultrasonic power of 100W, frequency of 20KHz, and temperature of 50℃, repeat the extraction once, and combine The extract was centrifuged at 4000 rpm for 20 minutes to obtain a clear extract. The clarified extract was filtered with a 0.45μm microporous membrane to obtain a microfiltration permeate. The microfiltration permeate is ultrafiltered with a hollow fiber ultrafiltration membrane with a relative molecular weight of 100 000 Daltons. Under room temperature, the pressure of the reflux valve is adjusted to 0.1Mpa, and the ultrafiltration permeate is collected. The ultrafiltration permeate was concentrated with a roll nanofiltration membrane with a cut-off relative molecular mass of 200 Daltons. At room temperature, the control pressure of the reflux valve was adjusted to 1.6Mpa, and the...

Example Embodiment

[0023] Example 2

[0024] Weigh 10kg of clean, decayed and moldy pine bark, crush it to 40 mesh, add 100L of deionized water, under the conditions of ultrasonic power of 1000W, frequency of 40KHz, temperature of 45℃, ultrasonic extraction for 40min, repeat extraction once , Combine the two extracts, use a centrifuge for solid-liquid separation, remove solid impurities, and obtain a clear extract. The clarified extract is sent to the microfiltration device through the booster pump, and the 0.5μm tubular ceramic microporous filter membrane is used for microfiltration. The temperature of the material liquid is controlled at about 35°C. The control pressure of the reflux valve is adjusted to 0.6Mpa, and the microfiltration permeation is collected. liquid. The microfiltration permeate is sent to the ultrafiltration device through the booster pump, and the hollow fiber ultrafiltration membrane with the intercepted molecular weight of 100 000 Dalton is used for ultrafiltration. The tem...

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Abstract

The invention discloses a method for extracting proanthocyanidin from pine bark by taking water as solvent. The method takes the pine bark as raw material and water as extraction solvent, utilizes ultrasonic wave technology for enhanced extraction to obtain proanthocyanidin leach liquor, uses the membrane separation technology of microfiltration for removing impurities, ultrafiltration purification and nanofiltration concentration for processing to obtain concentrated proanthocyanidin liquid, and finally obtains the proanthocyanidin product by vacuum or freeze drying. The method only takes the water as the extraction solvent, and utilizes the ultrasonic wave extraction technology and the membrane separation technology, so as to lead the whole technical process to be operated under the low temperature condition, thus not only effectively improving the extraction yield of active ingredients and ensuring bioactive substances not to be damaged, but also being safe and environment-friendly in production and having no residual chemical solvent on the product. Therefore, the proanthocyanidin is a natural and green product in the true sense, and the production method is very environment-friendly.

Description

technical field [0001] The invention relates to a method for extracting proanthocyanidins from pine bark, in particular to a method for extracting and separating proanthocyanidins from pine bark by using ultrasonic extraction technology and membrane separation technology, belonging to the technical field of natural product extraction. technical background [0002] Proanthocyanidins are polyphenolic compounds widely present in the plant kingdom, and are flavan-3-ol polymers formed by catechin or epicatechin through C-C bonds. Proanthocyanidin is a new type of high-efficiency antioxidant. Its antioxidant activity is 20 times that of vitamin C and 50 times that of vitamin E. It is the most powerful free radical scavenger found so far. It has direct or indirect effects on more than 70 diseases. It has a wide range of uses in medicine, food, health care, cosmetics and other fields. Pine bark is an important resource of proanthocyanidins, the source of raw materials is abundant, ...

Claims

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Application Information

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IPC IPC(8): C07D311/62
Inventor 郑光耀薄采颖宋强周维纯曹志庆
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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