A method for extracting flax lignans from flaxseed cake

A technology of flax lignan and flax seed cake, which is applied in chemical instruments and methods, preparation of sugar derivatives, sugar derivatives, etc., can solve the problems of high impurities, low purity of flax lignan, and high cost, and achieves a high yield. The effect of high rate, simple equipment and less pollution

Inactive Publication Date: 2011-12-14
晨光生物科技集团天津有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of low purity of flax lignans extracted

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for extracting flax lignans from flaxseed cake, comprising the steps of:

[0019] Subcritical water extraction is carried out on the linseed cake obtained after the pretreatment of linseed to remove impurities. The extraction conditions are: extraction temperature 160°C; extraction pressure 12MPa, extraction time 1h, to obtain an extract; Resin is purified, and the steps and conditions of purification are: (1) Adsorption: the ratio of D101 macroporous resin to extract is 1g: 25ml, and the flow rate is 2ml / min; (2) Analysis: The elution flow rate is 1ml / min , the analytical solvent is: ethanol, and after purification, it is spray-dried to produce flax lignans with a content of 75.6%.

Embodiment 2

[0021] A method for extracting flax lignans from flaxseed cake, comprising the steps of:

[0022] Grind flaxseeds, degrease and reflux for 3 hours with No. 6 solvent, evaporate to remove the solvent, and dry to obtain flaxseed cake;

[0023] The linseed cake is subjected to subcritical water extraction, and the extraction conditions are: extraction temperature 180°C; extraction pressure 10MPa, extraction time 2h, to obtain an extract; the extract is purified using DA101 macroporous resin, the steps of purification and The conditions are: (1) Adsorption: the ratio of DA101 macroporous resin to extract is 1g:30ml, the flow rate is 1.5ml / min; (2) analysis: the elution flow rate is 1ml / min, the analysis solvent is methanol, After purification, it is spray-dried to produce flax lignans with a content of 79.5%.

Embodiment 3

[0025] A method for extracting flax lignans from flaxseed cake, comprising the steps of:

[0026] Subcritical water extraction is carried out on the linseed cake obtained after the pretreatment of linseed to remove impurities. The extraction conditions are: extraction temperature 120°C; extraction pressure 15MPa, extraction time 0.1h, to obtain an extract; -8 type macroporous resin for purification, the purification steps and conditions are: (1) adsorption: the ratio of AB-8 type macroporous resin and extract is 1g: 20ml, and the flow rate is 3ml / min; (2) analysis: washing The desorption flow rate is: 1ml / min, the analytical solvent is: acetone, and after purification, it is spray-dried to produce flax lignans with a content of 90.3%.

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Abstract

The invention discloses a method for extracting linseed lignans from linseed cakes, which comprises the following steps: subcritical water extraction is performed on the linseed cakes obtained after the linseeds are pretreated to remove impurities, and the extraction conditions are as follows: The temperature is 40-200° C.; the extraction pressure is 5-15 MPa, and the extraction time is 0.1-6 hours to obtain an extract; the extract is purified with a macroporous resin, and then spray-dried to produce flax lignans. The invention uses subcritical water for extraction, which has the advantages of simple equipment, easy operation, rapidity, high yield, and cleanness. By changing the extraction temperature, the polarity of the water can be changed, so that different polarities in the sample matrix can be selectively extracted. Organic compounds, and it is extracted from pure water, without or rarely using organic solvents, so it has little or no pollution to the environment.

Description

technical field [0001] The invention relates to a method for extracting flax lignans from flax cake. Background technique [0002] Flax (Linum ustitatissimum), also known as flax, belongs to the dicotyledonous plant class Rosaceae Linaceae annual herb, is one of the world's top ten oil crops. In addition to being rich in a variety of substances such as linolenic acid and protein necessary for humans, flaxseed is also found to be rich in lignans, with a content of about 1%-4%, which is higher than other lignan-containing foods. 75-800 times higher in food. The structure of flax lignans is very similar to human estrogen, and it is considered a kind of phytoestrogens. Studies have found that flax lignans have anti-oxidation, anti-osteoporosis, lower serum cholesterol, enhance autoimmunity, delay aging, protect cardiovascular, etc., especially in inhibiting the growth of human breast cancer cells, reducing menopausal symptoms in women, and preventing colon cancer and prostate...

Claims

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Application Information

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IPC IPC(8): C07H15/18C07H1/08
Inventor 张卫军王如张立欣
Owner 晨光生物科技集团天津有限公司
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