Method for extracting high-purity gutta-percha from cortex eucommiae key fruit

A technology of eucommia samara and eucommia gum, which is applied in the field of extracting high-purity eucommia gum, can solve the problems of large solvent consumption, low gum purity, and large loss, and reduce the content of impurities, improve yield and purity, and optimize equipment less demanding effect

Inactive Publication Date: 2013-03-20
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The extraction methods of Eucommia gum include solvent method, alkali solution extraction method and comprehensive method, etc. These methods consume a lot of solvent, produce a lot of waste liqui

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) The treatment of Eucommia samara, the nuts in Eucommia samara are separated by mechanical method.

[0016] (2) Enzymatic hydrolysis. Add 3.5 times the amount of enzymatic hydrolysis solution to the above-mentioned processed Eucommia samara and perform enzymolysis at 43° C. for 3.8 hours. The preparation method of the enzymolysis solution is as follows: 12 grams of compound enzyme preparation with an enzyme activity of 22,000 units is dissolved in 500 ml of a buffer solution with a pH value of 6.5. The compound enzyme preparation consists of 65% cellulase mass fraction and the rest is pectinase.

[0017] (3) Extraction of high-purity Eucommia gum. Dry the eucommia samara after the above enzymatic hydrolysis to a water content of 8.8%, and then use petroleum ether as a solvent to extract the eucommia gum in the eucommia samara by Soxhlet extraction. The extraction time is 9 hours, and ethanol is added after the extraction The mass fraction of ethanol in the extract...

Embodiment 2

[0020] (1) The treatment of Eucommia samara, the nuts in Eucommia samara are separated by mechanical method.

[0021] (2) Enzymatic hydrolysis. Add 8 times the amount of enzymatic hydrolysis solution to the treated eucommia samara for 8 hours at a temperature of 52°C. The preparation method of the enzymolysis solution is as follows: dissolving 6 grams of compound enzyme preparation with an enzyme activity of 35,000 units in 500 ml of a buffer solution with a pH value of 6. The compound enzyme preparation consists of 70% cellulase mass fraction and the rest is pectinase.

[0022] (3) Extraction of high-purity Eucommia gum. Dry the eucommia samara after the above enzymatic hydrolysis to a water content of 6%, and then use petroleum ether as a solvent to extract the eucommia gum in the eucommia samara by Soxhlet extraction. The extraction time is 8 hours, and ethanol is added after the extraction The mass fraction of ethanol in the extract is 35%, the extract is filtered, and ...

Embodiment 3

[0025] (1) The treatment of Eucommia samara, the nuts in Eucommia samara are separated by mechanical method.

[0026] (2) Enzymatic hydrolysis. Add 5 times the amount of enzymatic hydrolysis solution to the treated eucommia samara and perform enzymolysis at 47° C. for 8 hours. The preparation method of the enzymolysis solution is as follows: 10 grams of compound enzyme preparation with an enzyme activity of 25,000 units is dissolved in 500 ml of a buffer solution with a pH value of 5.3. The compound enzyme preparation consists of 68% cellulase mass fraction and the rest is pectinase.

[0027] (3) Extraction of high-purity Eucommia gum. Dry the eucommia samara after the above enzymatic hydrolysis to a water content of 8%, and then use petroleum ether as a solvent to extract the eucommia gum in the eucommia samara by Soxhlet extraction. Ultrasonic waves are assisted during the extraction process, and the extraction time is 2.5 hours After the extraction, ethanol is added to m...

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Abstract

The invention discloses a method for extracting high-purity gutta-percha from cortex eucommiae key fruit. The method comprises the steps of: 1, processing the cortex eucommiae key fruit, particularly separating kernel from the cortex eucommiae key fruit mechanically; 2, carrying out enzymolysis, adding 3-10 times of enzymatic hydrolysate in the processed enzymolysis and carrying out enzymolysis for 3-10h at a temperature of 35-55 DEG C; and 3, extracting the high-purity gutta-percha, drying the cortex eucommiae key fruit subjected to the enzymolysis until the water content is 3-10 percent, extracting with petroleum ether as a solvent through adopting a soxhlet extraction method, adding alcohol to precipitate the gutta-percha after extracting, and filtering to obtain the high-purity gutta-percha. According to the invention, complex enzyme preparation enzymolysis, soxhlet extraction and ultrasonic assistance are applied to the field of extraction of the gutta-percha. Compared with the prior art, the method has the characteristics of mild reaction conditions, low requirement on equipment, no pollution, and high yield and purity of the gutta-percha, and is wide in application prospect.

Description

technical field [0001] The invention relates to a method for extracting eucommia gum, in particular to a process for extracting high-purity eucommia gum from Eucommia samara. Background technique [0002] The bark, leaves and samara of Eucommia all contain eucommia gum, and the gum content of samara is as high as 10%-15%, ranking first among all parts of the Eucommia tree. The planting area of ​​Eucommia ulmoides in my country is about 700,000 hectares, accounting for more than 90% of the world's planting area. Most of the Eucommia ulmoides trees have blossomed and bear fruit, and the output of Eucommia samara far exceeds the demand for planting seedlings. Formed a new renewable resource. [0003] Dugong gum, known internationally as gutta-percha or Balata, is an isomer of natural clover rubber and is trans-polyisoprene. Eucommia gum can be used as medical materials, rubber products, etc. through vulcanization and modification, and can also be blended with other materials t...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L7/00
Inventor 张永康银永忠陈功锡
Owner JISHOU UNIVERSITY
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