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Method for extracting gutta-percha from eucommia ulmoides by adopting ultrasonic wave and acid hydrolysis

A technology of ultrasonic wave and acid hydrolysis, which is applied in the field of extracting eucommia gum from Eucommia ulmoides by ultrasonic and acid hydrolysis, which can solve the problems such as the unsatisfactory yield of eucommia gum, and achieve the effect of increasing the yield and improving the extraction efficiency

Pending Publication Date: 2022-01-04
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only uses acid hydrolysis to extract Eucommia gum from Eucommia, and the final yield of Eucommia gum is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, add 100g of water, 1g of sulfuric acid and 40g of eucommia leaves into the flask, mix them evenly, and place them in an ultrasonic cell pulverizer with an ultrasonic power of 500W and an ultrasonic frequency of 15kHz; after ultrasonication for 30min, filter while hot, and dry Get hydrolysis slag.

[0024] Take 20 parts of the hydrolyzed residue, add 100 parts of petroleum ether, and then reflux at 85°C for 12 hours. After the reflux is completed, filter while it is hot. Move the filtrate into the refrigerator for freeze-out treatment, then filter and collect the solid, wash the filter residue with acetone, and air-dry to obtain Eucommia ulmoides glue.

[0025] The yield of Eucommia gum in this example is 4.24%.

Embodiment 2

[0027] First, add 100g of water, 0.01g of formic acid and 30g of eucommia bark into the flask, mix them evenly, and place them in an ultrasonic cell pulverizer with an ultrasonic power of 1200W and an ultrasonic frequency of 25kHz; after ultrasonication for 40min, filter while hot and dry The hydrolyzed slag is obtained.

[0028] Take 20 parts of the hydrolysis residue, add 80 parts of petroleum ether, and then reflux at 85°C for 12 hours. After the reflux is completed, filter while it is hot, move the filtrate into the refrigerator for freeze-out treatment, then filter and collect the solid, wash the filter residue with acetone, and air-dry to obtain Eucommia ulmoides glue.

[0029] The yield of Eucommia gum in this example is 4.64%.

Embodiment 3

[0031] First, add 100g of water, 0.05g of hydrochloric acid and 15g of Eucommia fruit into the flask, mix well, then place it in an ultrasonic cell pulverizer with an ultrasonic power of 3000W and an ultrasonic frequency of 100kHz; after ultrasonication for 60min, filter while hot and dry The hydrolyzed slag is obtained.

[0032] Take 20 parts of hydrolysis residue, add 60 parts of petroleum ether, and then reflux at 85°C for 12 hours. After the reflux is completed, filter while it is hot. Move the filtrate into the refrigerator for freeze-out treatment, then filter to collect the solid, wash the filter residue with acetone, and air-dry to obtain Eucommia glue.

[0033] The yield of Eucommia gum in this example is 6.84%.

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Abstract

The invention discloses a method for extracting gutta-percha from eucommia ulmoides by adopting ultrasonic wave and acid hydrolysis. The method comprises the following steps: uniformly mixing 100-120 parts by mass of an acid solution and 15-40 parts by mass of eucommia ulmoides raw materials, then carrying out ultrasonic treatment for 30-60 minutes to assist an acid hydrolysis reaction, filtering while the solution is hot to obtain a sugar-containing hydrolysate and hydrolysis residues, taking the dried hydrolysis residues, adding petroleum ether, and fully refluxing at the temperature of over 85 DEG C, filtering while the solution is hot after the refluxing is finished, transferring the filtrate into a refrigerator for freeze-out treatment, then filtering and collecting solids, washing filter residues with acetone, and drying in air to obtain the gutta-percha. According to the method, cellulose and hemicellulose in eucommia ulmoides are converted into the sugar-containing hydrolysate by utilizing the acid solution, and meanwhile, the acid solution can damage cellulose cells, so that subsequent extraction of the gutta-percha is facilitated; the ultrasonic cavitation effect of ultrasonic waves can fully destroy plant cell walls and fully expose the gutta-percha, and the subsequent extraction of the gutta-percha is also facilitated; and through the synergistic effect of the two processes, the yield and extraction efficiency of the gutta-percha are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of high phytochemical utilization of eucommia, in particular to a method for extracting eucommia gum from eucommia by means of ultrasonic coordinated acid hydrolysis. Background technique [0002] As the world's largest rubber consumption country, my country's annual rubber consumption is more than the sum of the United States and Japan, and the annual consumption of natural rubber is about 5 million tons. At present, the annual output of clover rubber, the main raw material of natural rubber in my country, is only 80 million tons. About 10,000 tons, the degree of dependence on foreign countries has reached more than 80%, seriously affecting the country's strategic security. Since my country's clover rubber is only suitable for growing in very few areas such as Xishuangbanna in Yunnan and Hainan, the production capacity has reached its limit. Under the current world situation, in order to ensure the country'...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L7/00
CPCC08J3/00C08J2307/00
Inventor 陈新德张海荣郭海军陈雪芳熊莲
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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