A method for jointly extracting galangal volatile oil and galangin from galangal

A galangin and combined extraction technology, which is applied in the production of fatty oil/fat, organic chemistry, and bulk chemical production, can solve the problems of inefficient extraction and utilization, ineffective extraction and utilization of residual galangin, waste of raw materials, etc. To achieve the effect of improving usable value, scientific and reasonable and efficient technical approach, and less time-consuming

Active Publication Date: 2020-12-29
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that after the volatile oil extraction of galangal is completed in the existing extraction method, the residual galangin has not been effectively extracted and utilized or cannot be efficiently extracted and utilized. A method that can jointly extract galangal through a continuous process is provided. The method of volatile oil and galangin, while ensuring that the volatile oil is fully extracted, extracts galangin from the residue for development and utilization, improves the utilization rate of functional components of galangal, and solves the problem of waste of raw materials

Method used

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  • A method for jointly extracting galangal volatile oil and galangin from galangal
  • A method for jointly extracting galangal volatile oil and galangin from galangal
  • A method for jointly extracting galangal volatile oil and galangin from galangal

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Embodiment 1

[0044] S1. Drying: fresh galangal is used as raw material, after being selected and cleaned, cut into pieces, remove the remaining stems and leaves, and then put them into heat pumps that have been preheated to 60°C for drying until the water content is 11% or less.

[0045] S2. Crush: Take the galangal obtained in S1, cut it into small pieces and remove the remaining stems and leaves, then immediately crush and sieve the galangal with a mesh number of 40 to obtain galangal powder.

[0046] S3. Extraction of volatile oil: take a certain amount of S2 gained galangal powder in supercritical CO 2 In the reaction kettle, the extraction pressure is 20MPa, the extraction temperature is 40°C, and the extraction time is 1.5h. The volatile oil is collected to obtain the light yellow transparent galanga volatile oil and the residue.

[0047] S4. Extraction of galangin: in the residue obtained in step S3, add an ethanol solution with a volume percentage concentration of 57%, a solid-liq...

Embodiment 2

[0051] This embodiment provides a method for jointly extracting galangal volatile oil and galangin. Others are the same as in embodiment 1, except that the drying described in step S1 is dried with hot air at a drying temperature of 75°C until the water content is 11. % or less.

[0052] In this example, the yield of volatile oil was 2.13mL / 100g, and the content of galangin was 9.58g / 100g.

Embodiment 3

[0054] This embodiment provides a method for jointly extracting galangal volatile oil and galangin. Others are the same as in Example 1, except that the extraction of the volatile oil described in step S3 adopts steam distillation, and the soaking time is 0 to 10 h. The liquid ratio is calculated in g / mL, which is 1:5~1:20, and the extraction time is 30~240min. Preferably, the soaking time is 0.5h, the solid-liquid ratio is 1:10, and the extraction time is 70min.

[0055] The present embodiment volatile oil impurity is less, operation requirement and technical difficulty requirement are relatively low, can guarantee the yield of higher volatile oil and galangin, in the present embodiment, volatile oil yield is 1.14mL / 100g, and galangin content is 9.69g / 100g.

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Abstract

The invention discloses a method for combined extraction of alpinia officinarum hance volatile oil and galangin from alpinia officinarum hance. The volatile oil and galangin extraction process is optimally designed; the process conditions of extraction of the volatile oil from the optimized alpinia officinarum hance is controlled; high alpinia officinarum hance volatile oil extraction rate is ensured; meanwhile, the foundation is laid for the subsequent alpinia officinarum hance extraction; the specific concentration of solvents is used for effectively extracting residues after the volatile oil extraction; an alpinia officinarum hance crude product is obtained. The obtained alpinia officinarum hance crude product achieves a good clearing effect on DPPH., ABTS and superoxide anion free radicals. The method has the advantages that alpinia officinarum hance volatile oil and galangin are simultaneously obtained; the extraction quantity of the alpinia officinarum hance volatile oil reaches3.23ml / 100g; the galangin extraction quantity reaches 9.98g / 100g; the scientific, reasonable and efficient technological paths are provided for alpinia officinarum hance utilization.

Description

technical field [0001] The invention relates to the technical field of bioactive component extraction, and more specifically, relates to a method for jointly extracting galangal volatile oil and galangin from galangal. Background technique [0002] Galangal (Alpinia officinarum Hance), also known as galangal, wind ginger (Hainan), and galangal (Guangxi), is a perennial herb of Zingiberaceae. Its dry root is mainly used as a medicinal part. Stomach, dispelling cold, expelling wind, promoting qi, and relieving pain. It can cure indigestion, stomach cold, vomiting, diarrhea, and dysentery. It is a commonly used traditional Chinese medicine. It mainly contains functional ingredients such as galangin and volatile oil, in addition to diaryl heptanes, sterols, glycosides and phenylpropanoids. [0003] Galangal volatile oil is the main functional component of galangal. It is a transparent light yellow oily liquid. It will be volatile at room temperature and immiscible with water. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/30C07D311/40C11B1/04C11B1/10
CPCC07D311/30C07D311/40C11B1/04C11B1/104Y02P20/54
Inventor 吴雪辉江盛宇
Owner SOUTH CHINA AGRI UNIV
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