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CO2 supercritical extraction method of rhodiola root glycoside with ethanol as entrainer

A technology of salidroside and entrainer, applied in solid solvent extraction, chemical instruments and methods, preparation of sugar derivatives, etc., can solve the problems of non-selective extraction of target compounds, large industrial pollution, long extraction time, etc. Easy-to-recycle, inexpensive, easy-to-refine effects

Inactive Publication Date: 2007-03-14
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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AI Technical Summary

Problems solved by technology

Traditional extraction methods have defects such as long extraction time, complicated process, low efficiency, large industrial pollution and no selectivity for the extraction of target compounds.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The optimal process parameter scheme obtained is:

[0013] The dried root of Rhodiola rosea L. was crushed and sieved (0.25 μm) as the material. Load it into an extraction kettle (supercritical extractor: American Applied Separator, model: Spe-ed SFE). The extraction temperature was 60°C, CO 2 When the fluid pressure is 300Par and the entrainer ethanol flow rate is 0.4ml / min, the extraction time is 2h. According to the above method, the extraction rate of salidroside is 1.398%, which is 3.56 times higher than the extraction efficiency by the traditional reflux method (0.39%).

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Abstract

The present invention relates to effective Chinese medicine component extracting technology, and is especially supercritical CO2 fluid extraction process for extracting rhodiola glycoside as the effective component of Rhodiola rosea. The present invention adopts orthogonal experiment design to screen out technological conditions for the supercritical CO2 fluid extraction process. In the conditions of Rhodiola rosea material granularity lower than 0.25 micron, extracting temperature of deg.c, CO2 fluid pressure of 300 Par, entrainer ethanol flow rate of 0.4 ml / min and extracting time of 2 hr, rhodiola glycoside extracting rate may reach 1.398 wt%, 3.56 times higher than traditional reflux process. Compared with traditional process, the present invention has the features of high speed, high accuracy, high efficiency and high economical efficiency.

Description

1. Technical field [0001] The invention relates to a new technology for extracting effective components of traditional Chinese medicines, in particular to a supercritical CO glycoside salidroside active component in Rhodiola rosea (Rhodiola rosea L.) 2 A new method for fluid extraction. 2. Background technology [0002] The chemical meaning of extraction is to use a suitable solvent and an appropriate method to leach the required components from the plant material as completely as possible, avoiding or reducing the introduction of harmful components or other impurities. Extracting chemical components from plants for medicinal purposes has a history of nearly 5,000 years in the traditional medicine of the motherland. Traditional extraction methods can be divided into two categories according to the different energy requirements of the extraction process. One is the heating extraction method, which mainly includes different methods such as decoction extraction, reflux extrac...

Claims

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Application Information

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IPC IPC(8): C07H15/18C07H1/08B01D11/02
CPCY02P20/54
Inventor 王强孟庆文
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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