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Eucommia ulmoides rubber refining method

A refining method, the technology of eucommia gum, is applied in the field of refining the natural plant eucommia ulmoides by leaching, which can solve the problems of high impurity content in the finished gum, impurity that cannot be effectively removed, and quality reduction of eucommia gum, and achieve high raw material utilization rate, High efficiency of impurity removal, effect of reducing the content of flavonoids and polysaccharides

Inactive Publication Date: 2013-08-21
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing method for extracting eucommia gum is to extract a single component of eucommia gum in isolation. The extraction of eucommia gum is not complete. Depolymerization makes the impurities wrapped in Eucommia gelatinization process, such as chlorophyll, etc. cannot be effectively removed, resulting in high impurity content in the finished glue, lower quality of Eucommia gum, low yield, high production cost, which is not conducive to popularization and application; in addition, using boiling point When the organic solvent is too low for extraction, the extraction safety is poor due to the high volatility of the organic solvent

Method used

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  • Eucommia ulmoides rubber refining method
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  • Eucommia ulmoides rubber refining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Prepare materials

[0052] The natural air-dried Eucommia leaves were shredded into fragments with a particle size of ≤4 mm for later use.

[0053] 2) Pretreatment of raw materials

[0054] A. Extract chlorophyll and β-carotene

[0055] Add 2 kg of eucommia leaf fragments into an ethanol solution with a mass percentage concentration of 90%, heat, soak to extract chlorophyll and β-carotene, and extract 4 times in total. ℃, 45 ℃, 50 ℃, filter after each extraction, and combine the filtrates; wherein, the ratio of the weight (dry weight) of Eucommia leaves to the volume of ethanol solution is 1:10 during each extraction, that is, to 2kg Eucommia leaves Add 20L of ethanol solution whose mass percentage concentration is 90%; wherein, in the first extraction process, the extraction temperature is 35°C, and the extraction time is 24h; the second extraction temperature is 40°C, and the extraction time is 18h; The extraction temperature is 45°C, and the extraction time is ...

Embodiment 2

[0073]Extracting chlorophyll and β-carotene in the raw material pretreatment process except that the weight (dry weight) of Eucommia leaves and the volume ratio of the ethanol solution with a mass percentage concentration of 90% during each extraction is 1:15, the first and second Two, the third, and the fourth extraction time are respectively 12h, 12h, 12h, and 12h; in the step of extracting lignans, the weight (dry weight) of leaves of Eucommia ulmoides and the mass percent concentration of 80% ethanol are removed The volume ratio of the solution is 1:15, and the first, second, third, and fourth extraction times are 12h, 12h, 12h, and 12h respectively; in the steps of extracting aucubin, chlorogenic acid, and protein, except for each The weight (dry weight) of leaves of Eucommia ulmoides during extraction is 1: 15 with the mass percent concentration of the ethanol solution volume ratio of 70%, and the first, second, third, and fourth extraction times are respectively 12h, 12h...

Embodiment 3

[0078] Except that the mass percent concentration of NaOH solution in the step of extracting flavonoids and polysaccharides in the raw material pretreatment process is 1%, the rest is the same as in Example 1.

[0079] The process of extracting eucommia gum is the same as that in Example 1 except that the relative density of the petroleum ether concentrate obtained by recovering petroleum ether is 1.5.

[0080] In the process of purifying eucommia gum, except that every 100ml of concentrated solution adds 10ml of acetone, and the relative density of the filtrate is 1.5, all the other are the same as in Example 1.

[0081] Purified to obtain 42.2g Eucommia gum, the yield of Eucommia gum was 2.11%, the color of Eucommia gum was white, the texture was fine and elastic.

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Abstract

The invention discloses a Eucommia ulmoides rubber refining method. The method comprises the following steps: 1, preprocessing Eucommia ulmoides leaves, and sequentially removing chlorophyll, beta-carotene, lignans, aucubins, chlorogenic acid, proteins, flavones and polysaccharide compounds from the Eucommia ulmoides leaves; 2, extracting Eucommia ulmoides rubber by adopting petroleum ether; and 3, adding a precipitating agent to a petroleum ether extract liquid obtained in step 2, and allowing the obtained mixture to stand for precipitation to obtain the Eucommia ulmoides rubber. The Eucommia ulmoides rubber obtained by refining through the method has a light color, solves a problem that the export of the Eucommia ulmoides rubber is limited because of the dark color, and has the advantages of low extraction cost, almost zero cost of the raw material, less energy consumption, small solvent loss, and high circulating utilization rate. A new reference direction is provided for the industrialized production.

Description

technical field [0001] The invention relates to a method for refining natural resin, in particular to a method for refining natural plant eucommia by means of extraction. Background technique [0002] Eucommia ulmoides (Eucommia Ulmoides) is a deciduous tree belonging to Eucommiaceae. It is a rare and precious economic tree species unique to my country, an important light industrial material, and an important gum source tree species with the most development prospects in subtropical and warm temperate zones. As a precious Chinese medicinal material, Eucommia ulmoides leaves and bark contain a variety of medicinal substances. The bark can be used as medicine, and the leaves can be used to make health tea and various beverages. The history of use can be traced back to the "Shen Nong Mucao Jing" in the second century AD. Modern studies have shown that Eucommia Ulmoide Gum (EUG), which is rich in white filamentous gum (Eucommia Ulmoide Gum, EUG) in leaves, bark and seeds, is int...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L7/00
Inventor 于志明单芙蓉陈素文刘六军
Owner BEIJING FORESTRY UNIVERSITY
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