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A method for extracting and separating eucommia gum

A technology of eucommia gum and eucommia polysaccharides, which is applied in the field of extraction and separation of natural product eucommia gum, which can solve the problems of smaller molecular weight, large consumption of organic solvents, reduction of elasticity, toughness and tensile strength of eucommia gum, and improve quality and yield , The effect of low extraction and separation temperature and short extraction and separation time

Active Publication Date: 2016-11-16
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively clean microbial method (Chinese patent: CN101914211A) extracts eucommia gum. The disadvantage is that the cycle is long and the cost is high. its subsequent use
The above-mentioned method has the following disadvantages that are difficult to overcome: 1. directly extracting with Eucommia raw material, the consumption of organic solvent is large, and the environmental pollution is serious
②If the raw material is not sufficiently crushed, the colloid cannot be completely leached out, and the yield will be affected
③ After the eucommia material is crushed, the elasticity, toughness and tensile strength of the eucommia gum are reduced
Unable to obtain the original ecological Eucommia gum with a high degree of polymerization
④Large equipment investment and high production cost

Method used

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  • A method for extracting and separating eucommia gum

Examples

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Effect test

Embodiment 1

[0027] A method for extracting and separating eucommia gum, comprising the steps of:

[0028] (1) Pre-treatment: the bark of Eucommia ulmoides, after removing impurities, passed the inspection according to the quality requirements of the Chinese Pharmacopoeia, and the dried bark of Eucommia was properly crushed by machinery, with a particle size of 1 cm, and placed in a dry and cool place for later use ;

[0029] (2) Steam explosion: Put the material processed in step (1) into a steam explosion device for steam explosion. The pressure of the steam explosion is 0.5MPa. 15min, the material temperature is room temperature after steam explosion;

[0030] (3) Mix the filter residue in step (2) with 0.5% NaOH solution according to the ratio of solid-liquid ratio of 1:5, extract at 60°C for 3 hours, filter, pump to the liquid storage tank, and perform secondary extraction When mixing according to the material-liquid ratio of 1:15, the extraction temperature and time are the same as...

Embodiment 2

[0034] A method for extracting and separating eucommia gum, comprising the steps of:

[0035] (1) Pre-treatment: the bark of Eucommia ulmoides, after impurity removal treatment, passed the inspection according to the quality requirements of the Chinese Pharmacopoeia, and the dried bark of Eucommia was properly crushed by machinery, with a particle size of 10 cm, and placed in a dry and cool place for later use ;

[0036] (2) Steam explosion: Put the material processed in step (1) into a steam explosion device for steam explosion. The pressure of the steam explosion is 1.2MPa. 8min, the material temperature is room temperature after steam explosion;

[0037] (3) Mix the filter residue in step (2) with 2% NaOH solution according to the ratio of solid-liquid ratio of 1:10, extract at 70°C for 2 hours, filter, pump to the liquid storage tank, and perform secondary extraction When mixing according to the material-liquid ratio of 1:5, the extraction temperature and time are the sa...

Embodiment 3

[0041] A method for extracting and separating eucommia gum, comprising the steps of:

[0042] (1) Pre-treatment: the bark of Eucommia ulmoides, after impurity removal treatment, passed the inspection according to the quality requirements of the Chinese Pharmacopoeia, and the dried bark of Eucommia was properly crushed by machinery, with a particle size of 5 cm, and placed in a dry and cool place for later use ;

[0043] (2) Steam explosion: Put the material processed in step (1) into a steam explosion device for steam explosion. The pressure of the steam explosion is 1.8MPa. 1min, the material temperature is room temperature after steam explosion;

[0044] (3) Mix the filter residue in step (2) with 4% NaOH solution according to the ratio of solid-liquid ratio of 1:20, extract at 80°C for 1 hour, filter, pump to the liquid storage tank, and perform secondary extraction When mixing according to the material-liquid ratio of 1:10, the extraction temperature and time are the sam...

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Abstract

The invention discloses a method for extracting and separating eucommia gum, which includes the steps of pretreatment, pretreatment, alkali treatment, enzymatic hydrolysis and extraction and purification. The pre-treated material is placed in water at 20-30° C. for 0-24 hours, and then the soaked material is put into a steam explosion device for steam explosion. The invention utilizes the steam explosion method to extract and separate the eucommia gum, without over-crushing the eucommia raw material, the extraction and separation time is short, and the oxidation of part of the eucommia gum due to long-term fermentation is effectively avoided, and the original filament eucommia gum can be obtained, maintaining the The biological characteristics, physical properties and physical state of the colloid maintain the original molecular structure and degree of polymerization. In addition, the present invention uses steam explosion pretreatment to extract and separate eucommia gum, and utilizes membrane concentration and separation technology to obtain eucommia polysaccharide, thereby increasing the added value of the product.

Description

Technical field: [0001] The invention belongs to the field of extraction and separation of eucommia gum, a natural product, and specifically relates to a method for extracting and separating eucommia gum from eucommia ulmoides by pretreatment with a steam explosion method. Background technique: [0002] Eucommia ulmoides Oliv. is a rare and precious woody medicinal plant unique to my country. It is called a "living fossil plant" and is also a relict plant of the Tertiary Period that only exists in my country. , mainly located in Gansu, Shaanxi, Shanxi, Henan, Hunan, Hubei, Sichuan, Yunnan, Guizhou, Guangxi, Jiangxi, Fujian and other provinces and autonomous regions from plains to hills and mountains at an altitude of 1,690 meters. The natural center is in central China. Since the 1980s, driven by the increasing demand for natural rubber, the development of eucommia gum has been an important measure to adjust the structure of the rubber industry. Various places have actively d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/00C08L7/00
Inventor 朱铭强苏印泉李飞舟朱亚红孙润仓尉芹王丽任钊
Owner NORTHWEST A & F UNIV
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