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Method for extracting dye based on waxberry tree barks

A bark and dye technology, applied in the direction of azo dyes, organic dyes, natural dyes, etc., can solve the problems of complex process, long extraction time and high time cost, so as to improve the solubility, improve the purity and improve the extraction rate. Effect

Inactive Publication Date: 2016-10-26
广西顺帆投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Produced in most parts of China, it grows in hillsides or valley forests at an altitude of 125 to 1500 meters. Myrica rubra is a famous fruit in the south of my country; the bark mainly contains myricetin, myricetin and tannins, which can be used as reddish-brown dyes and Astringent in medicine; the patent document with application number 201310419336.7 discloses a method for extracting and separating myricetin from bayberry tree. This invention uses ethanol as a solvent for multiple extractions, each time for 1 to 3 hours, and then concentrates and places for 8 Precipitation occurs within 24 hours, and petroleum ether, dichloromethane, chloroform, ethyl acetate, and acetone are used as solvents to extract the precipitate, and finally the product is crystallized to obtain the product. This method takes a long time to extract, the process is complicated, and the time cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method of extracting dyes from bayberry bark includes the following steps:

[0023] 1) After drying the bayberry bark, cut it into 1 cm sections, pulverize with liquid nitrogen and pass through an 80 mesh sieve to obtain bayberry bark powder, add 2 times the water, and then add yeast for fermentation for 1 hour. The added amount of bacteria is 1% (weight) of the water, and the filter residue is obtained by filtration;

[0024] 2) The filter residue is added to ethanol at a weight ratio of 1:8 for ultrasonic extraction for 0.5 hours, the ethanol is removed under reduced pressure, and then ethyl acetate is added at a weight ratio of 1:6 for extraction, and the crude extract is obtained by depressurizing and removing ethyl acetate;

[0025] 3) Add ethanol and ether to the crude extract at a weight ratio of 1:10, and place it in a high-voltage pulsed electric field for extraction for 1 hour to obtain an extract;

[0026] 4) The extract is filtered under reduced pressure, ethano...

Embodiment 2

[0029] The method of extracting dyes from bayberry bark includes the following steps:

[0030] 1) After drying the bayberry bark, cut it into 2 cm sections, pulverize with liquid nitrogen and pass a 100-mesh sieve to obtain bayberry bark powder. Add 4 times the amount of water and add yeast. The fermentation temperature is 60°C. During the fermentation process, vacuum is first applied and then nitrogen is introduced, so that the fermentation is carried out under a nitrogen environment, the fermentation time is 2 hours, the added amount of yeast is 1% (weight) of the water, and the filter residue is obtained by filtration;

[0031] 2) Add the filter residue to an ethanol solution with a mass fraction of more than 95% by weight at a weight ratio of 1:12. After ultrasonic extraction for 1 hour, the working frequency of the ultrasonic wave is 50 Hz. The ethanol is removed under reduced pressure, and then 85% by weight at a weight ratio of 1:6. Extract the above ethyl acetate solution, ...

Embodiment 3

[0036] The method of extracting dyes from bayberry bark includes the following steps:

[0037] 1) After drying the bayberry bark, cut it into 2 cm sections, pulverize with liquid nitrogen and pass through a 100-mesh sieve to obtain bayberry bark powder. Add 3 times the amount of water and add yeast. The fermentation temperature is 60°C. During the fermentation process, vacuum is first applied and then nitrogen is introduced, so that the fermentation is carried out in a nitrogen environment, the fermentation time is 1 hour, the added amount of yeast is 1% (weight) of the water, and the filter residue is obtained by filtration;

[0038] 2) Add the filter residue to an ethanol solution with a mass fraction of more than 95% by weight at a weight ratio of 1:10. After ultrasonic extraction for 0.5 hours, the working frequency of the ultrasonic wave is 100 Hz. The ethanol is removed under reduced pressure, and then 85% by weight at a weight ratio of 1:6. Extract the above ethyl acetate so...

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PUM

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Abstract

The invention discloses a method for extracting a dye based on waxberry tree barks. The method comprises the following steps: (1) smashing the waxberry tree barks, and adding saccharomycetes for fermentation; (2) performing coarse extraction by ethyl alcohol assisted ultrasonic treatment; (3) adding ethyl alcohol and diethyl ether into a coarse extracting solution to obtain a mixture, and placing the mixture into a high-voltage pulse electric field for extraction to obtain an extracting solution; (4) adsorbing and separating through macroporous resin, and eluting with ethyl alcohol; (5) concentrating and drying eluent to obtain the solid dye. According to the extracting method, fermentation, ultrasonic extraction and high-voltage pulse electric field extraction are adopted in sequence, so that the extracting rate of the dye in the waxberry tree barks and the dye purity are effectively improved; no toxic solvents is used for extraction, so that an extracted product is high in reliability and safe, and can be applied to food, medicine and cosmetics industries.

Description

Technical field [0001] The invention belongs to the technical field of plant dye extraction, and specifically relates to a method for extracting dyes based on bayberry bark. Background technique [0002] Bayberry tree, formerly known as Bayberry, aliases: Bayberry, Vermilion, Zhurong. The bayberry family and bayberry are evergreen trees with gray bark, longitudinally lobed when old; the crown is round. Branchlets and buds are glabrous, with few but not conspicuous lenticels, and only round and shield-shaped glands when young. The leaves are leathery, glabrous, and live to 2 years and fall off, often dense in the upper part of the twigs; it likes acidic soil. Produced in most areas of China, growing in mountain slopes or valley forests at an altitude of 125-1500 meters, bayberry is a famous fruit in the south of the Yangtze River in China; the bark mainly contains bayberry bark glycosides, myricetone and tannins, which can be used as russet dyes and Astringent in medicine; the ...

Claims

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Application Information

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IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 江凯
Owner 广西顺帆投资有限公司