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Method for recovering and extracting tannic acid from acer truncatum seed meal

A technology of ingot maple seeds and tannic acid, applied in chemical instruments and methods, preparation of sugar derivatives, sugar derivatives, etc., can solve the problems of small application range, high toxicity, cumbersome steps, etc., and achieve strong operability, The effect of low cost and simple process

Inactive Publication Date: 2018-12-21
湖南中茂生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the extraction of tannic acid is generally carried out from the medicinal plants gallnut, dendrobium, and tara, using organic solvents or water. Most of the obtained tannins are hydrolyzable. In addition to being more toxic than condensed tannins, hydrolyzed tannins have a relatively small range of applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Rough extraction: Weigh 50g of maple seed meal and extract with 250mL of 40% acetone, 250mL of 60% acetone and 250mL of 100% acetone in sequence on a water bath shaker. The liquid ratio is 1:5, the temperature is 60°C, and the pH=2, repeat 3 times and then filter, combine the filtrates and concentrate to obtain the crude extract of tannic acid;

[0027] 2. Removal of impurities: Add 1 times the volume of ethyl acetate and water to the crude tannic acid extract in step 1), wherein the volume ratio of ethyl acetate and water is 1:1. Then use methanol solution containing 4% hydrochloric acid to carry out fractional extraction, filter, combine the filtrates and then concentrate to obtain a tannic acid extract;

[0028] 3. Purification: Dilute the tannic acid extract obtained in step 2) with distilled water until the concentration of tannic acid is 0.1g / mL, and measure pH=4, while NKA- Fill the column with macroporous adsorption resin, then equilibrate with distilled wa...

Embodiment 2

[0030] 1. Rough extraction: Weigh 50g of maple seed meal, extract twice with 400mL of 40% ethanol, 400mL of 60% ethanol and 400mL of 100% ethanol on a water-bath shaker. The ratio of solid to liquid is 1:7, the temperature is 65°C, pH=3, repeat 3 times and then filter, combine the filtrates and concentrate to obtain the crude extract of tannic acid;

[0031] 2. Removal of impurities: Add 1 volume of ethyl acetate and 1 volume of water to the crude tannic acid extract in step 1), and then use 1 volume of methanol solution containing 4% hydrochloric acid for fractional extraction , filtered, and concentrated after combining the filtrates to obtain a tannic acid extract;

[0032] 3. Purification: Dilute the tannic acid extract obtained in step 2) with distilled water until the concentration of tannic acid is 0.3g / mL, and measure pH=2, while NKA- Fill the column with macroporous adsorption resin, then equilibrate with distilled water with pH=2, load the diluted tannic acid extra...

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Abstract

The invention provides a method for recovering and extracting tannic acid from acer truncatum seed meal. According to the characteristic that the polymerization degrees, the molecular weight, the polarity and the solubility of different compounds in the tannic acid are different, gradient extraction, fractional extraction for impurity removal, then purification and the like are performed to obtainthe tannic acid. The method has the beneficial effects as follows: according to the method, all kinds of tannic acid can be effectively extracted from the acer truncatum seed meal; the method is fast, simple, short in process, high in efficiency, strong in operability and low in cost; an obtained product is high in purity and extraction rate; through extraction of the tannic acid from acer truncatum seeds, toxin can be effectively removed, comprehensive utilization of acer truncatum is facilitated, and pollution to the environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of plant extraction, and more specifically relates to a method for recovering and extracting tannic acid from maple ingot seed dregs. Background technique [0002] Yuanbao maple, also known as pentagonal maple, is a unique tree species in China. It is a traditional greening and ornamental tree species, and a pure natural, pollution-free, high-nutritional medicinal and edible tree species. Ingot maple leaves are rich in brass, chlorogenic acid, polysaccharides, etc. Yuanbao maple seeds have large particles, high oil content, and are rich in oil, protein, nervous acid, vitamin E, tannic acid and other active substances, of which the content of neural acid is as high as 5%, so Yuanbao maple seed is not only an excellent edible vegetable oil It is also a medical and health care material. [0003] The tannic acid content of the seed coat of Yuanbao maple is as high as 60%, which is rarely seen in general vegeta...

Claims

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Application Information

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IPC IPC(8): C07H13/08C07H1/08
CPCC07H1/08C07H13/08
Inventor 赵勇彪李佳莲危志刚赵勇志
Owner 湖南中茂生物科技有限公司
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