Method for degrading high-polymeric procyanidine

A proanthocyanidin and polymer technology, applied in organic chemistry and other directions, can solve the problems of high molecular structure destructive, prolong catalyst activity retention time, reduce catalyst dosage, etc., achieve stable catalytic activity, less ionic liquid dosage, and storage time. long effect

Active Publication Date: 2018-12-28
CHENGUANG BIOTECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is to provide a method for degrading high-polymer proanthocyanidins, which can degrade high-polymer proanthocyanidins into oligomer proanthocyanidins with quaternary ammonium salt ionic liquids, and solve the problem of acid-base and other catalysts affecting oligomer proanthocyanidin molecules. The problem of high structural damage, and reduce the amount of catalyst, prolong the activity retention time of the catalyst

Method used

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  • Method for degrading high-polymeric procyanidine
  • Method for degrading high-polymeric procyanidine

Examples

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Effect test

Embodiment 1

[0037] Quaternary ammonium salt ionic liquid-C4 ionic liquid, the preparation method is as follows:

[0038] First weigh 1,3-propane sultone and N,N-dimethylbutylamine, the molar ratio of the two substances is 0.8:1, then weigh 1,3-propane sultone and quaternary ammonium salt 4 times the total volume of ethyl acetate, first add 1,3-propane sultone and ethyl acetate to the reaction vessel, and then slowly add N,N-dimethylbutylamine to the reaction through a constant pressure dropping funnel In the container, stir while adding the quaternary ammonium salt dropwise; after adding the three substances into the reaction container, stir and react at 60°C for 2h (white precipitation will occur during the reaction), cool down to room temperature after the reaction, and then Suction filtration is carried out to obtain solid precipitation; The solid precipitation obtained is washed with ethyl acetate, and each milligram of solid precipitation is washed with 3 milliliters of ethyl acetate...

Embodiment 2

[0041] Quaternary ammonium salt ionic liquid-C8 ionic liquid, the preparation method is as follows:

[0042] First weigh 1,3-propane sultone and N,N-dimethyl n-octylamine, the molar ratio of the two substances is 1:1, then weigh 1,3-propane sultone and quaternary ammonium Ethyl acetate 5 times the total volume of the salt, first add 1,3-propane sultone and ethyl acetate to the reaction vessel, and then slowly add N,N-dimethyl n-octylamine through the constant pressure dropping funnel Add in the reaction vessel, stir while adding the quaternary ammonium salt dropwise; After all the three substances are added into the reaction vessel, stir and react at 65°C for 2.5h (white precipitates will be produced during the reaction), and cool down to At room temperature, suction filtration is carried out again to obtain solid precipitation; The solid precipitation obtained is washed with ethyl acetate, and each milligram of solid precipitation is washed with 4 milliliters of ethyl acetate...

Embodiment 3

[0045] Quaternary ammonium salt ionic liquid-C12 ionic liquid, the preparation method is as follows:

[0046] First weigh 1,3-propane sultone and N,N-dimethyldodecylamine, the molar ratio of the two substances is 1.2:1, then weigh 1,3-propane sultone and 6 times the total volume of quaternary ammonium salt, first add 1,3-propane sultone and ethyl acetate into the reaction vessel, and then add N,N-dimethyl dodecyl Alkylamine is slowly added to the reaction container, and the quaternary ammonium salt is added dropwise while stirring; after all three substances are added to the reaction container, the reaction is stirred at 70°C for 3 hours (white precipitates will be produced during the reaction), and the reaction is over After being cooled to room temperature, carry out suction filtration to obtain solid precipitation again; The solid precipitation obtained is washed with ethyl acetate, and each milligram of solid precipitation is washed with 5 milliliters of ethyl acetate for ...

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Abstract

The invention discloses a method for degrading high-polymeric procyanidine and belongs to the technical field of high-polymeric compound degradation. The method comprises the steps of utilizing quaternary ammonium salt type ionic liquid to conduct catalytic degradation on the high-polymeric procyanidine. When the quaternary ammonium salt type ionic liquid is utilized to conduct catalytic degradation on the high-polymeric procyanidine, the method has the advantages of being small in ionic liquid use amount, moderate in reaction conditions and high in catalytic activity. A low-polymeric procyanidine obtained through catalysis is high in content and complete in molecular structure, the quaternary ammonium salt type ionic liquid preparing process is simple, the cost is low, and the prepared quaternary ammonium salt type ionic liquid is long in storage time and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the degradation of high-polymer proanthocyanidins, in particular to a method for catalyzing the degradation of high-polymer proanthocyanidins by ionic liquids, and belongs to the technical field of high-polymer compound degradation. Background technique [0002] Proanthocyanidins (PC) is a general term for a large class of polyphenolic compounds that widely exist in plants. It has strong antioxidant and free radical elimination effects, can effectively eliminate superoxide anion free radicals and hydroxyl free radicals, and is also involved in phosphoric acid. , the metabolism of arachidonic acid and protein phosphorylation, protect lipids from peroxidative damage; it is a powerful metal chelating agent, which can chelate metal ions and form inert compounds in the body; protect and stabilize vitamin C, help Vitamin C absorption and utilization. Proanthocyanidins are widely distributed and exist in the bark, shell, seed, core, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/62C07G99/00
CPCC07D311/62C07G99/00
Inventor 康莲薇连运河任晓惠安晓东王静苑小师
Owner CHENGUANG BIOTECH GRP CO LTD
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