Method for extracting eucalyptus citriodra volatile oil and 3,8-diol

A technology of lemon eucalyptus leaves and volatile oil, which is applied in the separation/purification of essential oils/fragrances, hydroxyl compounds, and fat production, to achieve the effect of improving comprehensive utilization value and reducing distillation costs

Active Publication Date: 2010-11-10
FUJIAN SENFA BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, volatile components that are carried over with water vapor and are soluble (or slightly soluble) in water have not received the attention they deserve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Cut fresh leaves of lemon eucalyptus into 9-16cm 2 fragments of

[0026] 2) Pile and store the chopped lemon eucalyptus leaves at 20-30°C for 24 hours of fermentation;

[0027] 3) Take chopped and fermented leaves of lemon eucalyptus as raw material, take 200g, add 5% sodium chloride in water, and distill for 4 hours by steam distillation, extract lemon eucalyptus oil phase volatile oil, and weigh 2.8223g;

[0028] 4) The raffinate after steam distillation is about 900mL, extracted with 450mL petroleum ether;

[0029] 5) Petroleum ether is dried with anhydrous sodium sulfate;

[0030] 6) Recover petroleum ether to obtain 0.9618g of light yellow oil (ie, water-soluble component), which is 3,8-diol, and the content is 81.3% as determined by chromatography.

Embodiment 2

[0032] 1) Cut fresh leaves of lemon eucalyptus into 9-16cm 2 fragments of

[0033] 2) Pile and store the chopped lemon eucalyptus leaves at 20-30°C for 30 hours of fermentation;

[0034] 3) Take chopped and fermented leaves of lemon eucalyptus as raw material, take 200g, add 10% sodium chloride to the water, and distill for 4 hours by steam distillation to extract volatile oil of lemon eucalyptus oil phase, weighing 2.8135g;

[0035] 4) The raffinate after steam distillation is about 880mL, and extracted with 880mL ether;

[0036] 5) Diethyl ether is dried with anhydrous sodium sulfate;

[0037] 6) Recover ether to obtain 0.9645 g of light yellow oil, which is 3,8-diol, and the content is 80.7% as determined by chromatography.

Embodiment 3

[0039] 1) Cut fresh leaves of lemon eucalyptus into 9-16cm 2 fragments of

[0040] 2) Pile and store the chopped lemon eucalyptus leaves at 20-30°C for 36 hours of fermentation;

[0041] 3) Take chopped and fermented leaves of lemon eucalyptus as raw material, take 200g, add 8% sodium chloride to the water, and use steam distillation to distill for 5 hours to extract lemon eucalyptus oil phase volatile oil, which weighs 2.8148g;

[0042] 4) The raffinate after steam distillation is about 760mL, extracted with 760mL petroleum ether;

[0043] 5) Petroleum ether is dried with anhydrous sodium sulfate;

[0044] 6) Recover petroleum ether to obtain 0.9560 g of light yellow oil, which is 3,8-diol, and the content is 81.7% as determined by chromatography.

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Abstract

The invention discloses a method for extracting eucalyptus citriodra volatile oil and 3,8-diol, which is characterized by comprising the following steps: 1) cutting fresh leaves of eucalyptus citriodora into fragments; 2) pilling the leaves of the eucalyptus citriodora for fermentation; 3) extracting a volatile oil of an eucalyptus citriodra oil phase by distillation by a sodium chloride-containing steam distillation method from the cut and fermented leaf fragments of the eucalyptus citriodora, which serve as the raw material; 4) extracting raffinate, which is obtained after the steam distillation, by using a solvent; 5) drying the solvent, which is obtained after extraction, with anhydrous sodium sulfate; and 6) reclaiming the solvent to obtain a yellowish oily material which is the 3,8-diol. In the method, the extraction rates and content of the eucalyptus citriodra volatile oil and the 3,8-diol are improved by combining fermentation technology and steam distillation, the content of the obtained 3,8-diol accounts for 80 percent of water soluble components and meets the 60 percent content requirement on mosquito-repelling products overseas, the 3,8-diol can be sold directly, and thus the comprehensive utilization value of eucalyptus citriodora is improved.

Description

technical field [0001] The invention relates to a plant extraction method, in particular to a method for extracting lemon eucalyptus leaf volatile oil and 3,8-diol. Background technique [0002] lemon eucalyptus ( Eucalyptus citriodora ) is a myrtaceae plant, widely planted in Guangdong, Guangxi, Fujian, Yunnan, Sichuan, Zhejiang, Hunan, Hubei, Jiangsu, Guizhou, Jiangxi and other regions. The essential oil (volatile oil) of lemon eucalyptus has a pleasant fragrance and is an important spice oil, which is widely used in the production of various spices, soaps, cosmetics and food. At present, the production of volatile oil of lemon eucalyptus at home and abroad adopts the traditional steam distillation process, and the volatile oil of lemon eucalyptus in the oil phase of the distillate is extracted as an essential oil product. However, volatile components that are carried over with water vapor and are soluble (or slightly soluble) in water have not received the attention the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02C07C35/08C07C29/76
Inventor 黄金龙
Owner FUJIAN SENFA BIOTECH
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