Method for abstracting dihydroquercetin and arabinogalactan from larch and processing residual thereof

A technology for arabinogalactan and processing residues, which is applied in the field of extracting dihydroquercetin and arabinogalactan, and can solve the problem of large amount of solvent and inability to extract arabinogalactan and dihydroquercetin at the same time Adsorption decolorization and other problems, to achieve the effect of cost saving

Inactive Publication Date: 2008-04-09
林琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current method for extracting dihydroquercetin in larch requires a large amount of solvent, the extracted dihydroquercetin needs to be adsorbed and decolorized, the extrac

Method used

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  • Method for abstracting dihydroquercetin and arabinogalactan from larch and processing residual thereof

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Experimental program
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specific Embodiment approach 1

[0015] Embodiment 1: The method for extracting arabinogalactan from larch and its processing residues in this embodiment is carried out as follows: 1. Grinding larch logs or their processing residues into powders with a particle size below 0.5mm 1. Soak the powder in deionized water at 25-100 ° C and 5-15 times the weight of the powder for 0.2-2.5 hours, and distill the soaked under reduced pressure until the weight is 1 / 5-1 / 20 of the original weight to obtain a concentrated solution; . Extraction of arabinogalactan: add low-carbon alcohol 1 to 5 times the weight of the concentrated solution for precipitation, separate the precipitate from the alcohol clear liquid, and then wash the precipitate with low-carbon alcohol; the arabinogalactan is obtained.

specific Embodiment approach 2

[0016] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the powder is soaked in deionized water at 35-90° C. and the weight is 6-14 times of the powder weight for 0.3-2.4 hours. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0017] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, the powder is soaked in deionized water at 55-70°C and 8-12 times the weight of the powder for 0.5-2 hours. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

A method for extracting the dihydroquercetin and arabinogalactan from the larch and the processing residues relates to the method for the extraction of the dihydroquercetin and the arabinogalactan. The present invention solves the problems that the dihydroquercetin which is extracted by the existing extraction methods of the dihydroquercetin needs to be absorbed for decoloration and the methods can not extract the arabinogalactan at the same time. The extraction of the arabinogalactan from the larch and the processing residues is carried out as the following steps: 1. smashing and soaking; 2. extraction of the arabinogalactan; thus obtaining the arabinogalactan. The extraction of the dihydroquercetin from the larch and the processing residues is carried out as the following steps: 1. smashing and soaking; 2. extraction of the arabinogalactan; 3. extraction of the dihydroquercetin; thus obtaining the dihydroquercetin. The present invention has the advantages that the extracted products do not need to be absorbed for decoloration and the present invention can extract the dihydroquercetin and the arabinogalactan at the same time.

Description

technical field [0001] The invention relates to a method for extracting dihydroquercetin and arabinogalactan. Background technique [0002] At present, dihydroquercetin in larch is mainly extracted by extraction method, but the amount of solvent required by the prior art is large, the extracted dihydroquercetin needs to be adsorbed and decolorized, the extraction rate is low, and the selection of raw materials is demanding. Larix also contains arabinogalactan of very high value, which was not extracted in the previous extraction methods, resulting in waste. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the current method for extracting dihydroquercetin in larch requires a large amount of solvent, the extracted dihydroquercetin needs to be adsorbed and decolorized, the extraction rate is low, the selection of raw materials is harsh, and it cannot be simultaneously The problem of extracting arabinogalactan and providing...

Claims

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Application Information

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IPC IPC(8): C08B37/02C07D311/30
Inventor 吴柏年陈静崔宝玉张宏伟
Owner 林琳
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