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Resin adsorption process for preparing tannin from sea-buckthorn leaf

A technology of resin adsorption and seabuckthorn leaves, applied in the direction of organic chemistry, can solve the problems of extraction of tannins that have not been seen yet, and achieve the effect of easy industrial production, simple and easy process, and broad development prospects

Inactive Publication Date: 2004-06-16
河北神兴沙棘研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are no reports of extracting tannins from seabuckthorn leaves at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Shade-dried seabuckthorn leaves are roughly crushed, using 40% (preferably 60%) ethanol aqueous solution as a solvent, soaking and extracting at 20°C, the weight ratio of seabuckthorn leaves to solvent is 1:8, leaching 4 times, the first The first time is 8 hours, the second time is 6 hours, the third time is 4 hours, and the fourth time is 2 hours. The extracts are combined and filtered through a double filter to obtain the filtrate.

[0019] (2) after above-mentioned filtrate reclaims ethanol, centrifugally obtains extract, or after reclaiming ethanol by filtrate, add chitosan or ZTC clarifying agent, its add-on is 0.05% of filtrate weight, the best is 0.15%, stir, leave standstill to wait After the precipitation was complete, the precipitate was removed by centrifugation to obtain a clear liquid.

[0020] (3) The above-mentioned extract (or clarified liquid) passes through the treated strong polar macroporous adsorption resin tower with a flow rate of 0.5BV / h, wa...

Embodiment 2

[0022] (1) Shade-dried seabuckthorn leaves are roughly crushed, soaked and extracted with 70% (preferably 50%) ethanol water solution at 50°C (preferably 80°C) for three times, the first time for 2 hours, and the other two times For 40 minutes each time, the weight ratio of seabuckthorn leaves to the solvent is 1:15, the combined extracts are filtered through a double filter to obtain the filtrate.

[0023] (2) Centrifuge the above-mentioned filtrate to obtain ethanol after reclaiming ethanol, or add chitosan or 101 clarifying agent after reclaiming ethanol by the filtrate, its addition is 0.20% of the weight of the filtrate, the best is 0.15%, stir, leave standstill to wait After the precipitation was complete, the precipitate was removed by centrifugation to obtain a clear liquid.

[0024] (3) The above-mentioned extract (or clarified liquid) passes through the treated AB-8 type medium polar macroporous adsorption resin tower with a flow rate of 3BV / h, washes with pure water...

Embodiment 3

[0026] (1) Shade-dried seabuckthorn leaves are coarsely crushed, using 95% (preferably 55%) ethanol aqueous solution as a solvent, and extracting seabuckthorn leaves twice at 90°C under reflux, the first time is 1.5h, the second time is 1h, and the seabuckthorn leaves are The weight ratio to the solvent is 1:12, the combined extracts are filtered through a duplex filter to obtain the filtrate.

[0027] (2) centrifuge after the above-mentioned filtrate reclaims ethanol to obtain the extract, or add chitosan or JA clarifier or Keyang 1+1 clarifier after the filtrate reclaims ethanol, its add-on is 0.11% of the filtrate weight, the best is 0.18%, stir, stand still, centrifuge to remove the precipitate after the precipitation is complete, and obtain a clear liquid.

[0028] (3) The above-mentioned extract (or clarified liquid) passes through the treated ZTC type polar macroporous adsorption resin tower at a flow rate of 1.8BV / h, washes with pure water until the effluent is colorle...

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PUM

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Abstract

The invention relates to a process for preparing tannin from sea-buckthorn leaves through resin adsorption method which comprises the steps of, (1) extracting sea-buckthorn leaves using 40-95% ethanol aqueous solution as dissolvent at the temperature of 20-90 deg.C, combining the extract liquid, filtering the reclaimed ethanol, obtaining extract liquid by centrifugation, (2) going through the disposed large hole adsorption resin tower, (3) water scrubbing until the driving off liquid becomes colorless, elution and reclaiming ethanol, vacuum drying to obtain brown to light brown extract. The invention realizes simple process thus can be applied in mass production.

Description

technical field [0001] The invention relates to a method for preparing tannins from seabuckthorn leaves by resin adsorption. technical background [0002] At present, there is no report of extracting tannins from seabuckthorn leaves at home and abroad. Our latest research has discovered a new active ingredient in seabuckthorn leaves - tannins. Seabuckthorn leaf tannins have significant pharmacological effects in anti-lipid peroxidation, detoxification, anti-mutation, anti-inflammation, lowering blood pressure, etc., and have broad development prospects. We studied and determined the method of preparing seabuckthorn leaf tannin by macroporous adsorption resin. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing tannin from seabuckthorn leaves by resin adsorption method with simple process and easy industrial production. [0004] The technical scheme that the present invention adopts is as fol...

Claims

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Application Information

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IPC IPC(8): C07G99/00
Inventor 刘玉平苏琳杨海荣金海英段中心
Owner 河北神兴沙棘研究院
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