Method for extracting taraxacum rubber

A technology of dandelion rubber and extraction method, which is applied in the field of extraction of dandelion rubber, and can solve the problem of toxic cost of solvent method

Pending Publication Date: 2020-01-03
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of toxicity and high cost of the solvent method in the prior art, the invention provides a method for extracting dandelion rubber

Method used

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  • Method for extracting taraxacum rubber
  • Method for extracting taraxacum rubber
  • Method for extracting taraxacum rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Acid-base neutralization and gel extraction method:

[0083] (1) Boil the dried root of dandelion rubber grass in water for one hour, peel the skin and pull out the core, and separate the root pulp from the root bark;

[0084] (2) 100g root pulp is boiled in 500ml of sulfuric acid solution at a concentration of 3% for 4h, then filtered, the filter residue is separated from the filtrate, the filter residue is dried to obtain rubber, and the filtrate is reserved for subsequent use;

[0085] (3) Boil 160g of root bark in 600ml of water for one hour, then dump the waste liquid; boil 80g of root bark in 570ml of 3% KOH solution for 4h, then filter, separate the filter residue from the filtrate, and dry the filter residue Rubber can be obtained, and the filtrate is reserved for subsequent use;

[0086] (4) Neutralize the filtrate in the process of acid boiling and alkali boiling. Through equivalent calculation, the filtrate of the acid boiling and alkali boiling parts obtain...

Embodiment 2

[0091] (1) Boil the dried root of dandelion rubber grass in water for one hour, peel the skin and pull out the core, and separate the root pulp from the root bark;

[0092] (2) 200g root pulp is boiled in 500ml of sulfuric acid solution at a concentration of 1% for 1h, then filtered, the filter residue is separated from the filtrate, the filter residue is dried to obtain rubber, and the filtrate is retained for subsequent use;

[0093] (3) Boil 320g root bark in 600ml water for one hour, then dump waste liquid; boil 80g root bark in 570ml 1% KOH solution for 1h, then filter, separate the filter residue from the filtrate, and dry the filter residue Rubber can be obtained, and the filtrate is reserved for subsequent use;

[0094] (4) Neutralize the filtrate in the process of acid boiling and alkali boiling. Through equivalent calculation, the filtrate of the acid boiling and alkali boiling parts obtained according to the above feeding ratio can be just neutralized to neutral, an...

Embodiment 3

[0097] (1) Boil the dried root of dandelion rubber grass in water for one hour, peel the skin and pull out the core, and separate the root pulp from the root bark;

[0098] (2) 80g root pulp is boiled 4h in the sulfuric acid solution under the 7% concentration of 500ml, then filters, and filter residue is separated from filtrate, and filter residue can be dried to obtain rubber, and filtrate is reserved for subsequent use;

[0099] (3) Boil 90g of root bark in 600ml of water for one hour, then dump the waste liquid; boil 80g of root bark in 570ml of 7% KOH solution for 4h, then filter, separate the filter residue from the filtrate, and dry the filter residue Rubber can be obtained, and the filtrate is reserved for subsequent use;

[0100] (4) Neutralize the filtrate in the process of acid boiling and alkali boiling. Through equivalent calculation, the filtrate of the acid boiling and alkali boiling parts obtained according to the above feeding ratio can be just neutralized to ...

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Abstract

The invention discloses a method for extracting taraxacum rubber. The method comprises the following steps: (1) boiling dried roots of taraxacum kok-saghyz, and removing bark and pulling out cores toseparate root pulp and root bark; (2) boiling the root pulp in a sulfuric acid solution, carrying out filtering, and drying filter residues to obtain rubber, wherein the filtrate is reserved for lateruse; and (3) boiling the root bark in water, and then boiling the root bark in an alkali solution, carrying out filtering, and drying the filter residues to obtain rubber. The method disclosed by theinvention is simple, cost is low, and the taraxacum rubber is free of toxicity. In addition, high-purity rubber can be extracted.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for extracting dandelion rubber. Background technique [0002] Due to the rapid development of the world, rubber has become one of the most widely used resources, and natural rubber has always been a research hotspot due to its high performance and renewable advantages. With the continuous enhancement of people's awareness of environmental protection, the carbon emission effect of synthetic rubber and other petroleum-based materials is becoming more and more obvious. The researchers focus on the development of the second natural rubber resources. [0003] Dandelion rubber grass (TKS) belongs to the second natural rubber, also known as Russian dandelion, is a perennial herb. Rubber grass has strong adaptability to climate and can be widely distributed in frigid, temperate and tropical regions. However, the sudden change of low temperature in the cold zone wil...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L7/00
CPCC08J3/00C08J2307/00
Inventor 张继川陈云汉马喆向同马勇聂秋海王峰张立群
Owner BEIJING UNIV OF CHEM TECH
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