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Water-based extraction method for taraxacum rubber

A technology of dandelion rubber and extraction method, which is applied in the field of rubber, can solve the problems of high cost of solvent, etc., and achieve the effect of low price, simple method and high cost problem

Inactive Publication Date: 2019-12-31
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art, the invention provides a water-based extraction method for dandelion rubber
In the whole process of extracting dandelion rubber, the present invention only uses water to extract, which is truly green and environmentally friendly, and the price of water is low, which solves the problem of high cost of solvent in the traditional solvent method of dandelion rubber extraction.

Method used

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  • Water-based extraction method for taraxacum rubber
  • Water-based extraction method for taraxacum rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Region: Xinjiang

[0041] (1) The dried root of dandelion rubber grass is cleaned and dried at room temperature;

[0042] (2) The dried dandelion roots are loosened by a rolling machine to separate the glue filaments from the surrounding tissues, and gently knead continuously to peel off the outer skin to the greatest extent, and continue to roll until the mass no longer decreases and reaches a constant weight.

[0043] (3) Add water to the residue containing rubber filaments and stir at a high speed, the stirring rate is 3000rpm, the stirring time is 4 minutes, and the stirring temperature is 40°C; sedimentation and separation are repeated twice to obtain dandelion rubber. The purity of the gel was 87.4%.

Embodiment 2

[0045] Region: Hainan

[0046] (1) The dried root of dandelion rubber grass is cleaned and dried at room temperature;

[0047](2) Treat the root with a milling groove, and keep rolling until there is no more residue rolling out, and the quality reaches a constant weight; the residue containing glue silk is obtained for ball milling to further remove the residue

[0048] (3) Add water to the mixture containing rubber filaments and stir at a high speed, the stirring rate is 6000rpm, the stirring time is 3 minutes, and the stirring temperature is 60°C; sedimentation and separation are repeated 3 times to obtain dandelion rubber. The purity of the gel was 90.6%.

[0049] Tested by infrared, such as figure 1 As shown, the spectrum contains methylene, carbon-carbon double bond, methyl group, etc. It is found that the stretching vibration peak of the cis-polyisoprene skeleton at 835cm-1 is obvious, which proves that the product we obtained is indeed the rubber in dandelion compone...

Embodiment 3

[0051] Region: Heilongjiang

[0052] (1) The dried root of dandelion rubber grass is cleaned and dried at room temperature;

[0053] (2) Crushing the dandelion root with a blender, sieving, and removing the residue; obtaining the residue containing gum filaments and performing ball milling to further remove the residue.

[0054] (3) Add water to the residue containing rubber filaments and stir at high speed, the stirring rate is 6500rpm, the stirring time is 2 minutes, and the stirring temperature is 80°C; sedimentation and separation are repeated 5 times to obtain dandelion rubber. The purity of the gel was 88.2%.

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Abstract

The invention discloses a water-based extraction method for taraxacum rubber. The method comprises the following steps: (1) cleaning dry roots of Taraxacum kok-saghyz, and drying the cleaned roots atroom temperature; (2) preprocessing the roots by a rolling and kneading machine, a rolling tank or a stirring machine, and removing residues to obtain residues containing rubber threads; and (3) adding water into a mixture containing the rubber threads, performing stirring at a high speed, and settling and separating the obtained mixture to obtain the taraxacum rubber. Only water is used for extraction in the whole extraction process, so environmental protection is truly achieved; and water has a low price, so the problem of high cost of a solvent in a traditional solvent extraction method fortaraxacum rubber is solved.

Description

technical field [0001] The invention relates to the technical field of rubber, and furthermore, relates to a water-based extraction method of dandelion rubber. Background technique [0002] Due to the rapid development of China's economy, the demand for rubber raw materials has been increasing in recent years. Taking 2016 as an example, the global natural rubber consumption was 12.65 million tons, an increase of 504,000 tons year-on-year. The substantial increase in demand, on the one hand, the consumption of natural rubber from the Chinese market has exceeded general expectations, and on the other hand, the performance of natural rubber consumption in overseas markets such as Southeast Asia is also relatively bright. In 2016, China's natural rubber consumption was about 4.896 million tons, an increase of 7% year-on-year, while the self-produced natural rubber was only 850,000 tons, and the dependence of natural rubber on foreign countries was close to 83%. The high degree ...

Claims

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Application Information

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