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Method for extracting tannin from shaniodendron subaequalum

A technology of silver hazel and tannin, applied in chemical instruments and methods, pharmaceutical formulations, preparations for skin care, etc., to achieve the effects of short extraction time, high extraction rate, and resistance to biological oxidation

Active Publication Date: 2017-10-20
WEST ANHUI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports about the extraction of tannins from Hamameliaceae, especially the extraction of tannins from Witch Hazel

Method used

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  • Method for extracting tannin from shaniodendron subaequalum

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Embodiment 1

[0032] A method of extracting tannins, extracting tannins from silver hazel.

[0033] A described method for extracting tannins from Silver Hazel, the method steps are as follows:

[0034] a) Extraction: After drying and constant weight, crush the silver hazel leaves, 1.000g, crush, add a little liquid nitrogen, grind into powder in a grinder, add 80% ethanol, extract under microwave heat reflux, combine the extracts, and centrifuge , take the supernatant, and separate it through a vacuum distillation device to obtain a tannin extract;

[0035] b) In step a), the tannin extract is removed with a macroporous resin, first eluting 6 column volumes with 10% ethanol, then eluting 10 column volumes with 75% ethanol, collecting the 75% ethanol eluate, and reducing Press and concentrate to obtain 75% ethanol eluate extract;

[0036] c) 75% ethanol eluting extract in step b) is separated with normal phase silica gel, and the dichloromethane-methanol gradient with a volume ratio of 80...

Embodiment 2

[0052] A method of extracting tannins, extracting tannins from silver hazel.

[0053] A described method for extracting tannins from Silver Hazel, the method steps are as follows:

[0054] a) Extraction: After drying and constant weight, crush the silver hazel leaves, 3.0000g, crush, add a little liquid nitrogen, grind into powder in a grinder, add 90% ethanol, extract under microwave heat reflux, combine the extracts, and centrifuge , take the supernatant, and separate it through a vacuum distillation device to obtain a tannin extract;

[0055] b) In step a), the tannin extract is removed with a macroporous resin, first eluting 6 column volumes with 10% ethanol, then eluting 10 column volumes with 75% ethanol, collecting the 75% ethanol eluate, and reducing Press and concentrate to obtain 75% ethanol eluate extract;

[0056] c) 75% ethanol eluting extract in step b) is separated with normal phase silica gel, and the dichloromethane-methanol gradient with a volume ratio of 8...

Embodiment 3

[0066] A method of extracting tannins, extracting tannins from silver hazel.

[0067] A described method for extracting tannins from Silver Hazel, the method steps are as follows:

[0068] a) Extraction: After drying and constant weight, crush the silver hazel leaves, 1.3680g, pulverize, add a little liquid nitrogen, grind into powder in a grinder, add 85% ethanol, extract under microwave heat reflux, combine the extracts, and centrifuge , take the supernatant, and separate it through a vacuum distillation device to obtain a tannin extract;

[0069] b) In step a), the tannin extract is removed with a macroporous resin, first eluting 6 column volumes with 10% ethanol, then eluting 10 column volumes with 75% ethanol, collecting the 75% ethanol eluate, and reducing Press and concentrate to obtain 75% ethanol eluate extract;

[0070] c) 75% ethanol eluting extract in step b) is separated with normal phase silica gel, and the dichloromethane-methanol gradient with a volume ratio ...

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PUM

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Abstract

The invention discloses a method for extracting tannin. The method is characterized by extracting tannin from shaniodendron subaequalum leaves. The method comprises the following steps: extracting plant materials containing tannin through an aqueous solution of alcohol via a microwave way, separating solvents from solid materials in an extraction solution by using a centrifugation method to obtain a tannin solution, purifying the tannin solution through macroporous resin, carrying out reduced-pressure concentration of an elution solution, freezing and drying in vacuum to obtain high-purity tannin. The method is short in extraction time and high in extraction rate; the purity of the extracted tannin is high.

Description

technical field [0001] The invention relates to the technical field of plant extraction, in particular to a method for extracting tannin from silver hazel. Background technique [0002] Tannin, also known as plant polyphenols, tannic acid, and tannic acid, is the translated name of English (Tannins). It is a polyphenolic compound that is widely found in leaves, buds, bark, and fruits of trees, and is attacked by insects. And in the galls generated. Tannin is yellow or brownish yellow amorphous loose powder, insoluble in ether, benzene, chloroform, easily soluble in water, ethanol, acetone, the aqueous solution has astringent taste. [0003] The extraction methods of tannins mainly include hot water extraction, organic solvent extraction, microwave-assisted method, ultrasonic method, supercritical CO 2 Extraction method, semi-bionic extraction method, etc. At present, hot water extraction and organic solvent extraction are rarely used due to long operation time and low eff...

Claims

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Application Information

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IPC IPC(8): C07H13/08C07H1/08A61P31/04A61P31/10A61P39/06A61K8/60A61Q19/00A61Q19/02
CPCA61K8/60A61K2800/10A61K2800/522A61K2800/524A61Q19/00A61Q19/02C07H1/08C07H13/08
Inventor 刘明珍李淮芬朱斌孙国鹏唐媛媛
Owner WEST ANHUI UNIV
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