Method for preparing eucommia rubber by using eucommia seeds

Abstract

The invention provides a method for preparing eucommia rubber by using eucommia seeds. The method comprises the following steps of: peeling and hulling the eucommia seeds; cleaning eucommia seed hulls in clean water, drying the eucommia seed hulls until the water content of the eucommia seed hulls is less than 4 percent; adding compound enzymes which contain 0.25 mass percent of cellulose, 0.03 mass percent of pectinase and 0.02 mass percent of protease, and performing enzymolysis on the eucommia seed hulls at the temperature of 50 DEG C and at a stirring speed of 500r/min for 1 to 3 days; filtering the mixture, sending the filter residue to an ultrasonic extraction tank, and performing ultrasonic extraction to obtain colloid mixed liquid; filtering the colloid mixed liquid by using a 50 to 200-mesh filter screen to remove impurities, and feeding the colloid mixed liquid without impurities into a separation tank; and finally, extracting the eucommia rubber by the method of precipitating crystals of the eucommia rubber at a low temperature. The method is simple, causes light pollution, is high in yield, low in cost and good in effect, the extraction rate is over 95 percent, the content of the eucommia rubber reaches 99.9 percent, and the eucommia rubber prepared by the method has long rubberized threads and is high in physical strength such as tensile strength and tearing strength and wide in application range.

Description

technical field [0001] The invention relates to a method for extracting natural products, in particular to a method for preparing eucommia gum from eucommia seeds. Background technique [0002] Eucommia rubber is the only one in the world other than clover rubber (natural rubber) with huge [0003] development prospects of high-quality natural rubber resources, and the planting area of ​​Eucommia in my country accounts for the world's [0004] More than 99% of the planting area has a monopoly resource advantage. Some developed countries abroad, such as Japan, buy a lot of eucommia leaves from my country at high prices to speed up the research and development of new materials for eucommia gum. Therefore, the application and development of eucommia rubber are the key topics of national research. [0005] However, at present, the domestic industry does not have a high awareness of the development prospects of the Eucommia industry. [0006] It has become an industrial cha...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: serious damage to the glue filament, poor physical properties, high toxicity of the solvent, unrecyclable, complicated process, serious pollution, and high cost

The disadvantages of this method are: the cooking temperature is high, the rubber filament is destroyed, the pollution is large, the purity of the rubber filament is not high, and the production cycle is long

The disadvantages of this method are: the mixed solvent cannot be used, the cost is high, the regeneration cycle of the wounded tissue is long, and the leather toxicity is large.

The disadvantages of this method are: serious pollution by concentrated acid and concentrated alkali, large amount of sewage discharge, serious damage to Eucommia gum by alkali, decline in physical properties, and the product is coarse rubber

[0023] According to the analysis of the above status quo, no matter which of the above extraction methods, there are many defects in the process, such as many times of extraction, heavy environmental pollution, and low extraction yield.

Therefore, the current bottleneck in realizing the industrialization of Eucommia rubber extraction is mainly the problem of high processing and extraction costs and poor extraction accuracy.

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