A method for continuously and efficiently extracting dandelion rubber and inulin from dandelion rubber grass

A dandelion rubber and cyclic extraction technology is applied in the field of continuous and efficient cyclic extraction of dandelion rubber and inulin from dandelion rubber grass, which can solve the problems of low resource utilization efficiency, high energy consumption and material consumption, single product, etc., and achieve a rich process product line. , the effect of reducing energy consumption and material consumption and improving resource utilization efficiency

Active Publication Date: 2015-12-02
BEIJING UNIV OF CHEM TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of low resource utilization efficiency, single product, high energy and material consumption, and high cost of the existing rubber extraction technology, and provide a method for efficiently and continuously extracting dandelion rubber and inulin from dandelion rubber grass roots

Method used

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  • A method for continuously and efficiently extracting dandelion rubber and inulin from dandelion rubber grass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After cleaning the dandelion rubber grass, separate the leaves and roots, weigh 100g of dandelion wet root (moisture content ≈ 40%), and crush it to a sheet-like adhesion body with a thickness of 0.5mm and a diameter of about 2mm. Then, according to the weight ratio of water and dandelion wet root of 6:1, put the crushed dandelion wet root into the extraction reaction kettle, add 600ml of distilled water, and extract at the boiling point. The extract is light yellow semi-finished inulin , the extract was treated by conventional processes such as decolorization, and then spray-dried to obtain 10 g of white finished inulin.

[0022] In order to improve the extraction rate, the extraction preferably adopts 6 stages of countercurrent extraction process, and the extraction time of each stage is 15 minutes. According to the above process to extract inulin, 10g of inulin can be extracted from every 100g of dandelion wet root (moisture content ≈ 40%). Based on the inulin conte...

Embodiment 2

[0024] Dry the inulin dregs obtained after extraction in Example 1 (45g, moisture content 8%), and then put the dried inulin dregs into the extraction reaction kettle according to the weight ratio of the solvent to the inulin dregs of 6:1 And add 310ml of toluene, extract at 40°C, inject the extract into the steam tank for steam distillation to recover the solvent, the steam pressure is 350ka, and dandelion rubber is precipitated at the same time, and floats on the water surface, open the valve below the steam tank, rubber and water Get rid of together, obtain 3g dandelion rubber through drying and weighing. The final slag is dried and weighed to be 38g (moisture content <10%)

[0025] In order to improve the extraction rate, the extraction adopts a 6-section countercurrent extraction process, and the extraction time of each section is 15 minutes. According to the above process to extract dandelion rubber, 3g of dandelion rubber can be obtained per 100g of dandelion wet root ...

Embodiment 3

[0027] After cleaning the dandelion rubber grass, separate the leaves and roots, weigh 100g of dandelion wet root (water content ≈ 60%), and crush it to a sheet-like adhesion body with a thickness of 0.5mm and a diameter of about 5mm. Then according to the weight ratio of water and dandelion wet root being 10:1, put the crushed dandelion wet root into the extraction reaction kettle, add 1000ml of distilled water to extract, the extract is light yellow semi-finished inulin, and The extract was treated by conventional processes such as decolorization, and then spray-dried to obtain 12 g of white finished inulin.

[0028] In order to improve the extraction rate, the extraction preferably adopts a 7-stage countercurrent extraction process, and the extraction time of each stage is 30 minutes. According to the above process to extract inulin, 12g of inulin can be extracted per 100g of dandelion wet root (water content ≈60%). Based on the inulin content of 40wt% (dry root weight), t...

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Abstract

The invention relates to a method for continuously effectively circularly extracting taraxacum rubber and synanthrin from dandelion taraxacumkok-saghyz. Taraxacum rubber belongs to a nonpolar substance, synanthrin belongs to a polar substance, and taraxacum rubber and synanthrin are obtained by extraction based on the water-oil separation principle employed by the method of the invention. The extract liquor of taraxacum rubber is subjected to steam distillation for separation of taraxacum rubber, and recycling and reusing of the solvent are realized. The extract liquor of synanthrin is subjected to a spray drying technology for obtaining of refined synanthrin. The final residual biomass residue is subjected to composting and is returned to the field, so that solid pollution is avoided and effective utilization of waste is realized. The method is characterized in that only one organic solvent is employed, and two products of taraxacum rubber and synanthrin are obtained during production. Taraxacum rubber and synanthrin split the cost mutually, and the product price is effectively reduced. The final composting and field returning of the residue help to realize resource utilization maximization. The whole technological process is circulatory, the extraction solvents are utilized circularly, energy consumption and material consumption are substantially decreased, and there are basically no discharged ''three wastes (waste gas, waste water and industrial residue)''.

Description

technical field [0001] The invention relates to a method for continuously and efficiently extracting dandelion rubber and inulin from dandelion rubber grass (Taraxacumkok-saghyz). Background technique [0002] In 2011, my country consumed 3.7 million tons of natural rubber, of which 730,000 tons were self-produced and 2.97 million tons were imported. The dependence on foreign countries exceeds 80%, and the situation is not optimistic. Therefore, based on the country, developing a second natural rubber resource that can completely replace clover natural rubber is an effective way to break my country's heavy dependence on imports of natural rubber. In the border area near Kazakhstan in Xinjiang, my country, a dandelion rubber grass (Taraxacumkok-saghyz) grows, and its roots contain about 10% (dry weight) of natural rubber. The molecular structure of dandelion rubber and Brazilian clover rubber is exactly the same, and it can completely replace clover natural rubber in indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/18C08J3/00C08L7/00
Inventor 张立群张继川孙树泉王锋刘实忠
Owner BEIJING UNIV OF CHEM TECH
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