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Method for extracting essential oil in traditional Chinese medicinal materials

A technology of Chinese herbal medicines and essential oils, which is applied in the field of extracting essential oils from Chinese herbal medicines with a new type of green solvent combined with microwave-assisted steam distillation, which can solve the problems of large cell damage and achieve the effects of reducing pollution, overcoming high costs and high yields

Inactive Publication Date: 2019-04-12
ZHEJIANG UNIV OF TECH
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Problems solved by technology

At the same time, after the morphology of the extracted residue was analyzed by scanning electron microscopy, it was found that the damage to the cells after treatment with the deep eutectic solvent was greater

Method used

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  • Method for extracting essential oil in traditional Chinese medicinal materials
  • Method for extracting essential oil in traditional Chinese medicinal materials
  • Method for extracting essential oil in traditional Chinese medicinal materials

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Embodiment 1

[0042] Embodiment 1: the extraction of Chinese medicinal material Zanthoxylum bungeanum essential oil

[0043] (1) Preparation of binary and ternary deep eutectic solvents

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Abstract

The invention provides a method for extracting essential oil in traditional Chinese medicinal materials. The method provided by the invention has the following beneficial effects: a novel green binaryand ternary deep eutectic solvent is adopted as an extracting agent, the problem that an organic reagent with higher toxicity is used as an extraction solvent in a traditional essential oil extraction technology is overcome, and pollution to the environment is reduced; a combination of the novel green solvent and a microwave-assisted steam distillation technology is used for the first time, the shortcomings of high costs, long extraction time, high labor intensity and the like existing in the traditional extraction technology are overcome, and compared with a method using a binary deep eutectic solvent, a method using a ternary deep eutectic solvent can obtain a higher yield of the essential oil; compared with extraction technologies of microwave steam distillation and ultrasound-assistedternary deep eutectic solvent steam distillation, the ternary deep eutectic solvent combined with microwave-assisted steam distillation extraction method can obtain a higher yield of the essential oil and volatile components; an extraction device is easy to clean to reduce residues of a sample and a solvent; and the method can be combined with the practice to provide a novel means for extractionof the plant essential oil.

Description

(1) Technical field [0001] The invention relates to a method for extracting essential oils in Chinese medicinal materials, in particular to a method for extracting essential oils in Chinese medicinal materials with a novel green solvent combined with microwave-assisted steam distillation. (2) Background technology [0002] Essential oils, which are secondary metabolites in plants, are oily substances with volatile and aromatic odors. The traditional extraction methods of essential oils mainly include: pressing method, solvent extraction method, steam distillation method, and simultaneous distillation extraction method. Pressing is the oldest way to obtain essential oils. The process does not require heating and is easy to operate. However, the obtained essential oils often contain impurities such as mucus, and it is difficult to completely extract the volatile oils in plants. Solvent extraction is by far the easiest way to obtain essential oils, but its extraction efficienc...

Claims

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Application Information

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IPC IPC(8): C11B9/02G01N30/02G01N30/06
CPCG01N30/02G01N30/06C11B9/025C11B9/027
Inventor 李祖光赵奕萍王鹏李上
Owner ZHEJIANG UNIV OF TECH
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