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Method for extracting eugenol in velvety lilac flower leaves

An extraction method, the technology of eugenol, which is applied in the field of plant active ingredient extraction, can solve the problems of low eugenol extraction rate, complicated preparation process, and low eugenol purity, and achieves short extraction time, high extraction efficiency, and no solvent residue Effect

Inactive Publication Date: 2010-09-01
TIANJIN ZHONGAO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently preparing eugenol generally adopts ethanol reflux extraction method, steam distillation, ultrasonic extraction method, microwave extraction method, although the above-mentioned method can prepare eugenol, there are following problems: 1. the eugenol extraction rate is low; 2. The preparation cost is high; 3. The preparation process is complex and the extraction time is long; 4. Solvent residues are prone to occur, which makes the purity of eugenol lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for extracting eugenol in Kanto clove leaves, which comprises the following steps:

[0018] (1) After cleaning the 200g of lilac leaves screened, carry out drying treatment, after pulverizing with a pulverizer, all pass through a 40-mesh sieve to obtain lilac powder;

[0019] (2) The sifted Kanto clove powder is extracted with a supercritical carbon dioxide extraction device: first put the sieved Kanto clove powder into an extraction tank, the extraction temperature is controlled at 45°C, and the extraction pressure is controlled at 12MPa, The carbon dioxide flow rate is controlled at 20L / h, and the extraction time is controlled at 90min. After the extraction is completed, the extract A is obtained;

[0020] (3) the extract A obtained in the step (2) is extracted 3 times with 25ml concentration of 15% NaOH solution to obtain the extract B, after the extract B is acidified with 6mol / L hydrochloric acid until the blue litmus paper is acidic, Extract 3 times with...

Embodiment 2

[0022] A method for extracting eugenol in Kanto clove leaves, which comprises the following steps:

[0023] (1) After cleaning the 200g of lilac leaves screened, carry out drying treatment, after pulverizing with a pulverizer, all pass through a 40-mesh sieve to obtain lilac powder;

[0024] (2) The sifted Kanto clove powder is extracted with a supercritical carbon dioxide extraction device: first put the sieved Kanto clove powder into an extraction tank, the extraction temperature is controlled at 30°C, and the extraction pressure is controlled at 20MPa, The flow rate of carbon dioxide is controlled at 10L / h, and the extraction time is controlled at 60min. After the extraction is completed, extract A is obtained;

[0025] (3) the extract A obtained in the step (2) is extracted 3 times with 25ml concentration of 15% NaOH solution to obtain the extract B, after the extract B is acidified with 6mol / L hydrochloric acid until the blue litmus paper is acidic, Extract 3 times with ...

Embodiment 3

[0027] A method for extracting eugenol in Kanto clove leaves, which comprises the following steps:

[0028] (1) After cleaning the 20 g of lilac leaves screened, carry out drying treatment, and all pass through a 40-mesh sieve after pulverizing with a pulverizer to obtain lilac powder;

[0029] (2) The sifted Kanto clove powder is extracted with a supercritical carbon dioxide extraction device: first put the sieved Kanto clove powder into an extraction tank, the extraction temperature is controlled at 50°C, and the extraction pressure is controlled at 10MPa, The carbon dioxide flow rate is controlled at 50L / h, and the extraction time is controlled at 80min. After the extraction is completed, the extract A is obtained;

[0030] (3) Extraction A obtained in step (2) is extracted 3 times with 2.5ml concentration of 15% NaOH solution to obtain extraction B, and extraction B is acidified with 6mol / L hydrochloric acid until the blue litmus paper is acidic , extracted 3 times with 2...

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Abstract

The invention relates to a method for extracting eugenol in velvety lilac flower leaves, comprising the following steps of: firstly, cleaning and drying the velvety lilac flower leaves, sieving by a 40-mesh sieve after crushing the velvety lilac flower leaves by a crusher, and obtaining velvety lilac flower powder; secondly, putting the sieved velvety lilac flower powder into an extraction tank with the extraction temperature of 30-50 DEG C, the extraction pressure of 10-20 MPa, the carbon dioxide flow of 10-50L / h and the extraction time of 50-100min, and obtaining an extraction liquid A; and thirdly, obtaining an extraction liquid B by extracting the extraction liquid A by an NaOH solution 3 times, obtaining an extraction liquid C by extracting the extraction liquid B by ether 3 times after acidizing the extraction liquid B to show acid property on blue litmus paper by chlorhydric acid; drying by anhydrous sodium sulfate, and recovering the ether to obtain a light yellow oily liquid, i.e. the eugenol. An extraction solvent used in the preparation method has the advantages of wide sources, low cost, high extraction ratio, low cost, simple operation, short extraction time, high extraction efficiency and no solvent residues.

Description

technical field [0001] The invention belongs to the field of extraction of effective plant components, in particular to a method for extracting eugenol from Kanto lilac leaves. Background technique [0002] The chemical name of eugenol is 2-methoxy-4-allylphenol and its molecular formula is C 10 h 12 o 2 , is light yellow or colorless oily liquid, turns brown in the air, has a strong aroma of spices, is a good plant-derived medicine, exists in clove oil, inner laurel leaf oil, inner cinnamon oil, camphor oil, Nutmeg oil etc. Eugenol has a wide range of pharmacological effects, mainly anti-bacterial and anti-inflammatory, anti-corrosion and fresh-keeping, insecticidal and anthelmintic, antipyretic and analgesic, and anti-animal parasites. It is often used as toothpaste fragrance, antioxidant and preservative in daily life, but because eugenol is a volatile oil, it is extremely difficult to dissolve in water, has poor stability, and is easy to lose during the production an...

Claims

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Application Information

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IPC IPC(8): C07C43/23C07C41/34
Inventor 陈庆忠安同伟李丹
Owner TIANJIN ZHONGAO BIOTECH
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