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Method for extracting proanthocyanidins from dahurian larch bark

A technology for peeling proanthocyanidins and proanthocyanidins, which is applied in the field of plant extraction and separation, can solve the problems of low utilization efficiency and low value, and achieve the effects of improving extraction efficiency, reducing energy consumption and maintaining natural activity.

Inactive Publication Date: 2013-07-31
呼伦贝尔益林生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is mainly used in the production of chemical products such as tannin tanning agent, adhesive agent, mud treatment agent and rust remover. The value of the product is low and the utilization efficiency is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 1 kg of larch bark is crushed into particle size and is 40~60 mesh particles, with 3.75L, 80% ethanol solution at 30 DEG C, under 30MPa, the larch bark particle is kept statically in the extraction kettle for 30min, then in CO 2 Extract at a flow rate of 2.78 L / min for 30 minutes to obtain an extract; repeat 2 times, combine the extracts twice, and obtain a filtrate through vacuum filtration, concentrate the filtrate under reduced pressure, and dry to obtain crude proanthocyanidins. The purity is 78%, and the yield is 25%.

[0037] (2) The crude product of proanthocyanidins in step (1) is made into 2L concentration of ethanol solution (ethanol concentration is 20%) of 2.0mg / ml, and the HPD-100 type produced by the pretreated Cangzhou Baoen Adsorption Material Technology Co., Ltd. Adsorption by macroporous adsorption resin, eluting saturated HPD-100 macroporous resin with 2L of 95% ethanol solution until no proanthocyanidins flow out, then stop elution, and collect e...

Embodiment 2

[0043] (1) 1 kg of larch bark is crushed into particle size and is 30~40 mesh particles, with 4L, 70% ethanol solution at 35 ℃, under 30MPa, the larch bark particle is kept statically in the extraction kettle for 40min, then in CO 2 Extract at a flow rate of 3L / min for 50min to obtain the extract; repeat 2 times, combine the extracts twice, and obtain the filtrate through vacuum filtration, concentrate the filtrate under reduced pressure, and dry to obtain the crude proanthocyanidin. At this time, the purity of procyanidin in the crude product is It was 70%, and the yield was 18%.

[0044] (2) The crude product of proanthocyanidins in step (1) is made into 2L concentration of ethanol solution (ethanol concentration is 20%) of 3.0mg / ml, and the HPD-400A type large-scale product produced by the pretreated Cangzhou Baoen Adsorption Material Technology Co., Ltd. After adsorption by the porous adsorption resin, 2L of 95% ethanol was used to elute the saturated HPD-400A macroporous ...

Embodiment 3

[0049] (1) 1 kg of larch bark is crushed into particle size and is 70~80 mesh particles, with 5L, 70% ethanol solution at 40 ℃, under 40MPa, the larch bark particle is kept statically in the extraction kettle for 40min, then in CO 2 Extract at a flow rate of 3 L / min for 60 minutes to obtain the extract; repeat twice, combine the two extracts, and obtain the filtrate through vacuum filtration, concentrate the filtrate under reduced pressure, and dry to obtain the crude proanthocyanidin. At this time, the purity of the procyanidin in the crude product is It was 69%, and the yield was 16%.

[0050] (2) The crude product of proanthocyanidins in step (1) is made into 2L concentration of ethanol solution (ethanol concentration is 20%) of 3.0mg / ml, and the HPD-400A type large-scale product produced by the pretreated Cangzhou Baoen Adsorption Material Technology Co., Ltd. After adsorption by the porous adsorption resin, 2L of 95% ethanol was used to elute the saturated HPD-400A macrop...

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Abstract

The invention discloses a method for extracting proanthocyanidins from dahurian larch barks. The method comprises the following steps of: (1) grinding dahurian larch barks into granules, and (2) performing supercritical extraction to obtain a proanthocyanidin extraction liquid. The method makes full use of dahurian larch barks in the Da Hinggan Ling area and has the characteristics that the raw materials are easily available, the cost is low, the yield of supercritical extraction is high, the extract is not damaged, and the production is safe and environment-friendly. The method can satisfy the needs for proanthocyanidins.

Description

technical field [0001] The invention belongs to the technical field of plant extraction and separation, in particular to a method for extracting proanthocyanidins from larch bark. Background technique [0002] In the 1990s, the world's medical community found that many diseases of people originated from a kind of oxygen molecule called free radicals left after metabolism in the body. It can share an electron with any organ or tissue in the body at any time and combine to cause the aging of human organs. Studies have shown that the onset of more than 70 diseases such as human aging, inflammation, Parkinson's disease, stroke, and cancer is directly related to it. Therefore, finding an effective free radical scavenger becomes a goal pursued by people. [0003] In recent years, people have gradually shifted the research focus of free radical scavengers to oriental medicine represented by traditional Chinese medicine. Studies have shown that many Chinese herbal medicines contai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62
CPCY02P20/54
Inventor 张力平崔晓霞张小丽罗书勤
Owner 呼伦贝尔益林生物科技有限公司
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