New process for improving utilization ratio of lithospermum

A utilization rate and new process technology, applied in the new process field of extracting comfrey polysaccharides, can solve the problems of incomplete utilization of active ingredients, low extraction efficiency of comfrey resources, and inability to meet market demand, so as to achieve good product quality and post-processing Simple and pure effect

Inactive Publication Date: 2010-06-09
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art that Xinjiang comfrey plant resources are short on the one hand and cannot meet the current market demand; on the other hand, the extraction ef...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Take 350g of comfrey powder that has been crushed to 40 meshes, and put it into 1L of supercritical CO 2 In the extraction kettle for extraction, the extraction temperature is controlled to be 45°C, the extraction pressure is 25Mpa, the flow rate of carbon dioxide is controlled at 20kg / h, and the extraction time is 2 hours. After the extraction was finished, 13.8 g of Comfrey extract was isolated from the separation kettle, and the yield of Comfrey extract was 3.94%.

Embodiment 2

[0025] Take 365g of comfrey powder that has been crushed to 40 meshes, and put it into 1L of supercritical CO 2 In the extraction kettle for extraction, the extraction temperature is controlled to be 50° C., the extraction pressure is 30 MPa, the flow rate of carbon dioxide is controlled at 30 kg / h, and the extraction time is 3 hours. After the extraction was finished, 17.9 g of Comfrey extract was isolated from the separation kettle, and the yield of Comfrey extract was 4.90%.

Embodiment 3

[0027] Get 1865g of comfrey powder that has been crushed to 40 meshes, and put it into 5L of supercritical CO 2 In the extraction kettle for extraction, the extraction temperature is controlled to be 50°C, the extraction pressure is 25Mpa, the flow rate of carbon dioxide is controlled at 50kg / h, and the extraction time is 4 hours. After the extraction was finished, 87.8 g of Comfrey extract was isolated from the separation kettle, and the yield of Comfrey extract was 4.71%.

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Abstract

The invention provides a new process for improving utilization ratio of lithospermum. The new process comprises the following steps of: using Chinese medicament lithospermum as a raw material; smashing the raw material to obtain lithospermum powder; using supercritical CO2 as an extracting solvent; controlling corresponding extraction temperature, pressure, flow rate of CO2 and extraction time; separating lithospermum extract containing a fat-soluble naphthaquinone type component; after separating the fat-soluble lithospermum extract, using lithospermum powder residue left after supercritical extraction and water or dilute ethanol as the raw materials; controlling a certain extraction temperature, time, a solvent ratio and extraction times; extracting water soluble polysaccharide components therein; condensing extraction solution; adding high-concentration ethanol solution to the condensed extraction solution in proportion; standing the mixture; and separating deposit by filtering so as to obtain lithospermum polysaccharide.

Description

technical field [0001] The invention relates to a method for extracting fat-soluble naphthoquinone pigment components and water-soluble polysaccharide components from comfrey. More specifically, the present invention relates to a comfrey extract containing fat-soluble naphthoquinone pigment components from comfrey using supercritical or subcritical fluid extraction technology, and then using the extracted comfrey The grass powder residue is used as a raw material, and water or dilute ethanol aqueous solution is used as an extraction solvent to further extract comfrey polysaccharide from it. Background technique [0002] Comfrey is a commonly used traditional Chinese medicine, and its root is used as medicine. It is named for its purple root. Comfrey was first recorded in "Shen Nong's Materia Medica". It tastes bitter and cold in nature. It has the functions of cooling blood and activating blood, clearing away heat and detoxifying, reducing inflammation and clearing rashes. ...

Claims

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Application Information

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IPC IPC(8): A61K36/30A61P31/04A61P39/06A61P35/00A61P31/12A61P37/04A61P1/16A61P3/10A61K125/00
CPCY02P20/54
Inventor 刘玉梅
Owner XINJIANG UNIVERSITY
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