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Method for preparing flax lignins

A technology of flax lignan and flaxseed meal, which is applied in the preparation of sugar derivatives, lignin derivatives, chemical instruments and methods, etc., can solve the problems of product residues, inconvenient industrial production, and limited product wide application, etc. Achieve the effect of shortening extraction time and saving ethanol consumption

Active Publication Date: 2010-09-15
成都圆大生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It brings inconvenience to industrial production, leaves residues on the product, and limits the wide application of the product

Method used

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  • Method for preparing flax lignins
  • Method for preparing flax lignins

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Add 400Kg of degreased linseed meal into a 1500L Soxhlet extraction tank, add 70% ethanol solution that is 3 times the amount of raw materials, soak for 3 hours, then pass through steam and heat to 80-100°C, reflux for 10 hours, extract and concentrate at the same time Extract, after the extraction is completed, reclaim ethanol, then concentrate the extract to Baume degree 8-12, cool to room temperature, adjust the pH value of the concentrate to 3 with hydrochloric acid, transfer the acid concentrate to a high-speed centrifuge, and use 3000rpm Centrifuge at a speed of 5 minutes, pour out the supernatant, add water with a pH value of 3 to the centrifuged sediment, beat, and centrifuge at a speed of 3000rpm for 5 min, repeat this operation twice; take out the centrifuged sediment, add 2 times the amount of Water, add 30% sodium hydroxide solution dropwise under stirring at room temperature, adjust the pH of the reaction solution to 11, hydrolyze at room temperature, check ...

Embodiment 2

[0036]Embodiment 2: Using commercially available linseed as raw material, add 400Kg of linseed meal after pressing and deoiling into a 1000L Soxhlet extraction tank, add 2 times the amount of raw material in 50% ethanol solution to soak linseed meal for 1h, and then Heat to 80-100°C with steam, reflux and extract for 14 hours, and concentrate the extract at the same time. After the extraction is complete, recover ethanol, cool to room temperature, adjust the pH of the concentrated solution to 2 with sulfuric acid, transfer the turbid solution to a high-speed centrifuge, Centrifuge at a high speed for 5 minutes, pour out the clear night, add water with a pH value of 2 to the centrifuged precipitate, beat the slurry, and centrifuge for 5 minutes, repeat this operation twice, take out the solid precipitate, add about 2 times the amount of water, and stir at room temperature Add 10% potassium hydroxide concentrated solution dropwise, control the pH of the reaction solution to 10, u...

Embodiment 3

[0037] Example 3: Using commercially available linseed as raw material, add 400Kg of linseed meal after pressing and deoiling into a 3000L Soxhlet extraction tank, add 6 times the amount of raw material and 95% ethanol solution to sub-soak the linseed meal for 5h, Then feed steam to heat to 80-100°C, reflux for extraction for 6 hours, and concentrate the extract while extracting. After the extraction is complete, recover ethanol, then concentrate the extract to about 400L, cool to room temperature, and adjust the pH of the concentrate to 4 with sulfuric acid. Transfer the turbid liquid to a high-speed centrifuge, centrifuge at a speed of 8000rpm for 5min, pour out the clear night, add water with a pH value of 4 to the centrifuged precipitate, beat, and centrifuge for 5min, repeat this operation twice, take out the solid precipitate, Add about 4 times the amount of water, add 50% concentrated sodium hydroxide solution dropwise under stirring at room temperature, control the pH o...

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Abstract

The invention discloses a preparation of secoisolariciresinol diglucoside, including steps of: ethanol extracting flaxseed meal in a soxhlet extraction device, wherein concentrated solution is obtained by decompress concentrating the extract; edulcorating the extract by acid precipitation and centrifugation; obtaining crude product of secoisolariciresinol diglucoside by alkaline hydrolysis, regulating PH value of extract, decompress concentrating and drying subsequently; product of secoisolariciresinol diglucoside with high content of SDG is obtained by ethanol extracting the crude product. The inventive production process is simple, easy to industrialize, totally avoid using toxic organic solution, and avoid using separation medium such as silica gel, macroporous resin, gelatin. The invention is capable of keeping effective elements of polyphenol in raw material, so as to ensure good medicine efficacy of subsequent product, while in favor of security of subsequent usage. The product can be used to improve osteoporosis, metabolism disorder of blood lipid, obesity, depression caused by women's climacteric syndrome, and to prevent and treat diseases related to heart, prostate, colonand kidney.

Description

technical field [0001] The invention relates to a method for preparing flax lignans, more specifically, relates to a method for extracting and refining flax lignans from flaxseed meal or flaxseed shell. Background technique [0002] Flaxseed is the seed of the annual herb flax, which is rich in linolenic acid (Omega-3), linoleic acid, lignans, dietary fiber, protein, etc. It can be used for food, as well as for health food and drug development. Lignans are a kind of phytoestrogens, which play an important role in preventing heart disease, menopausal syndrome and osteoporosis. Flaxseed contains a variety of lignans, such as secoisolariciresinol (SECO), matairesinol (MAT), demethoxysecoisolariciresinol (demethoxysecoisolariciresinol), pinoresinol ( pinoresinol), lariciresinol, secoisolariciresinol diglycoside (SDG), etc., these compounds all contain the same phenolic hydroxyl group, and SDG is the main lignan. US 5,705,618 patent reports the purification of SDG through the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07G1/00C07H1/08C07H15/18
Inventor 蔡泽贵成大全苟荣
Owner 成都圆大生物科技有限公司
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