Method for extracting and concentrating gutta-percha and recycling organic solvent

A technology of organic solvent and eucommia gum, which is applied in the field of extraction and separation of natural products, can solve the problems of inapplicability to industrial production, low purity of eucommia gum, unfavorable industrial production, etc., to achieve low production cost, reduce energy consumption, and increase economic efficiency The effect of added value

Pending Publication Date: 2021-12-17
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic solvent method generally utilizes some low-polarity solvents such as petroleum ether, chloroform, etc. to dissolve Eucommia gum from Eucommia leaf cells, but directly add solvent to extract, the yield is low, and there are many impurities. The extracted Eucommia gum The purity is not high, and the relatively clean microbial fermentation method (such as Chinese patent: CN101914211A) extracts Eucommia gum, the early fermentation period is long, the cost is high, and it is not suitable for industrial production
The latest method for extracting and separating eucommia gum (such as Chinese patent application CN104231281A) uses steam explosion pretreatment and enzymatic hydrolysis to extract eucommia gum. The procedure is complicated and the operation is difficult, which is not conducive to expanding to industrial production
Therefore, the traditional solvent method, microbial fermentation method or enzymatic hydrolysis method and the latest steam explosion method to extract Eucommia gum have certain defects.

Method used

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  • Method for extracting and concentrating gutta-percha and recycling organic solvent

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Experimental program
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Effect test

Embodiment 1

[0040] The method for extracting, separating and purifying Eucommia gum from leaves of Eucommia provided in this embodiment is as follows:

[0041] Step (1): Wash the raw material of eucommia leaves, dry them, grind them mechanically, and set them aside.

[0042] Step (2): Soak the material in a small amount of 4.5% dilute alkali solution for 2 hours, and then add the raw material of Eucommia ulmoides leaves to the dilute alkali solution at a material-to-liquid ratio of 1:15 into a wet-process ultrafine pulverizer. The power of the wet ultrafine pulverizer is 2kw, and the particle size after pulverization is 2-40μm.

[0043] Step (3): The feed liquid obtained by pulverizing in the step (2) is separated by a ceramic membrane with a membrane pore size of 0.2 μm to obtain the Eucommia leaf filter residue and permeate. Rinse and filter the Eucommia leaf filter residue with clean water until it is basically colorless, and control the liquid pH value of the cleaned filter residue a...

Embodiment 2

[0047] The method for extracting, separating and purifying Eucommia gum from leaves of Eucommia provided in this embodiment is as follows:

[0048] Step (1): Wash the raw material of eucommia leaves, dry them, grind them mechanically, and set them aside.

[0049]Step (2): Soak the material in a small amount of 6% dilute alkali solution for 0.5 h, and then add the raw material of Eucommia ulmoides leaves to the dilute alkali solution at a material-to-liquid ratio of 1:10 into a wet-process ultrafine pulverizer. The power of the wet ultrafine pulverizer is 10kw, and the particle size after pulverization is 2-40 μm. The temperature was controlled at room temperature.

[0050] Step (3): The feed liquid obtained by pulverizing in step (2) is separated by a ceramic membrane with a membrane pore size of 0.2 μm to obtain the waste residue of Eucommia leaves and the permeate. Rinse and filter the eucommia leaf waste residue with clear water until it is basically colorless, and contro...

Embodiment 3

[0054] The method for extracting, separating and purifying Eucommia gum from leaves of Eucommia provided in this example, the specific operations are as follows

[0055] Step (1): Wash the raw material of eucommia leaves, dry them, grind them mechanically, and set them aside.

[0056] Step (2): Soak the material in a small amount of 5.5% dilute alkali solution for 0.25h, and then add it into a wet-process ultrafine pulverizer according to the material-liquid ratio of Eucommia leaf raw material and dilute alkali solution: 1:5. The power of the wet ultrafine pulverizer is 12kw, and the particle size after pulverization is 2-40μm. The temperature was controlled at room temperature.

[0057] Step (3): The feed liquid obtained by pulverizing in step (2) is separated by a ceramic membrane to obtain Eucommia leaf waste residue and permeate. The membrane pore size is 0.2 μm. Rinse and filter the eucommia leaf waste residue with clean water until it is basically colorless, and the p...

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Abstract

The invention belongs to the technical field of extraction and separation of natural products, and particularly relates to a method for extracting and concentrating gutta-percha and recycling an organic solvent. The method comprises the following steps of: concentrating a solution obtained by extracting a folium cortex eucommiae raw material by using an organic solvent under the pressure of 0.5-3.0 Mpa by using a nanofiltration membrane, separating the organic solvent, and further separating the solvent of the concentrated solution to obtain crude gutta-percha. According to the method, membrane separation and membrane concentration technologies are utilized, the precipitation time of the gutta-percha is shortened, the organic solvent can be further recycled, and the economic added value of the gutta-percha preparation process is increased.

Description

technical field [0001] The invention belongs to the technical field of extraction and separation of natural products, and specifically relates to a method for extracting and concentrating eucommia gum and recovering an organic solvent using eucommia leaves as raw materials. Background technique [0002] Eucommia is a deciduous tree of Eucommiaceae. Since ancient times, bark of Eucommia has been used as medicine, and has a history of thousands of years. Due to the slow growth and low yield of Eucommia bark, modern research has turned to better understanding of other parts of Eucommia. The chemical composition of eucommia leaves is very similar to that of eucommia bark, and their physiological activities also overlap to a large extent. Therefore, the extraction and separation process of active components of eucommia leaves has become a hot spot in modern research. Eucommia ulmoides leaves are very rich in China, and the annual output of eucommia ulmoides trees during the thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00C08J11/02C08L7/00
CPCC08J3/00C08J11/02C08J2307/00
Inventor 钟文蔚郭立玮陈顺权
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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