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Method for extracting and separating eucommia ulmoides rubber

A technology of eucommia gum and eucommia polysaccharide, 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: 2014-12-24
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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  • Method for extracting and separating eucommia ulmoides rubber

Examples

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Comparison scheme
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 ulmoides rubber. The method comprises the following steps: performing pretreatment, performing alkali treatment, performing enzymolysis, and performing extraction and purification. The innovative points are that the step of steam explosion pretreatment is carried out after the step of pretreatment and comprises the following sub-steps: soaking a pretreated material in water with the temperature of 20-30 DEG C for 0-24 hours, and performing steam explosion on the soaked material in a steam explosion device. According to the method, the eucommia ulmoides rubber is extracted and separated by the steam explosion process, the eucommia ulmoides raw material does not need to be excessively ground, the extraction and separation time is short, the oxidation of part of the eucommia ulmoides rubber caused by long-time fermentation is effectively avoided, the natural filament eucommia ulmoides rubber can be obtained, the biological characteristics, physical performance and physical state of a rubber body are kept, and the original molecular structure and polymerization degree are kept; in addition, while the eucommia ulmoides rubber is extracted and separated by the steam explosion pretreatment, eucommia ulmoides polysaccharides are obtained by a membrane concentration and separation technology and the added value of a product is increased.

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 Applications(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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