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Method for extracting cinnamomum camphora essential oil enriched with 1,8-cineole by using ionic liquid as green medium

A technology for ionic liquid and linalool essential oil, which is applied in the directions of essential oils/spice, fat production, organic chemistry, etc., can solve the problems of poor designability of ionic liquids, and achieves high economic and social benefits, simple preparation method and good quality. Effect

Active Publication Date: 2018-05-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of ionic liquid can only change the length of the alkyl chain on the 1-position N of the imidazole ring, and the number of carbon atoms in the alkyl chain is usually less than 8 due to the small liquid range, so the designability of the ionic liquid is poor.

Method used

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  • Method for extracting cinnamomum camphora essential oil enriched with 1,8-cineole by using ionic liquid as green medium
  • Method for extracting cinnamomum camphora essential oil enriched with 1,8-cineole by using ionic liquid as green medium
  • Method for extracting cinnamomum camphora essential oil enriched with 1,8-cineole by using ionic liquid as green medium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fresh Cinnamomum camphora leaves are crushed with a pulverizer and passed through a 20-mesh sieve; 5.0g Cinnamomum camphora leaf powder is weighed in a 50mL three-necked bottle, and 15.0g of 1,3-di-sec-butylimidazolium chloride ionic liquid is added to control The temperature of the water bath is 30°C, the working frequency of the ultrasonic circulation extractor is 40KHz, the output power is 500W, and the ultrasonic-assisted extraction is 2 hours; after the extraction is completed, the oil-water mixture is obtained by distillation under reduced pressure, and the liquid is separated. The upper layer is cinnamon essential oil, which is extracted The extraction rate is 4.52%, which is 3.0 times of the steam distillation extraction rate (1.50%); the extracted essential oil components are analyzed by GC-MS, and the content of 1,8-cineole in the essential oil is 52.35%, which is the highest extraction rate of steam distillation. 1.6 times that of the law (32.65%).

Embodiment 2

[0028] Fresh cinnamon camphor leaves were crushed with a pulverizer and passed through a 20-mesh sieve; 5.0 g of cinnamon camphor leaf powder was weighed in a 50 mL three-necked bottle, and 15.0 g of 1,3-dipropenyl imidazolium bromide ionic liquid was added, and the water bath was controlled to The temperature is 40°C, the operating frequency of the ultrasonic circulation extractor is 40KHz, the output power is 500W, and the ultrasonic-assisted extraction is 2 hours; after the extraction is completed, the oil-water mixture is obtained by distillation under reduced pressure, and the upper layer is the essential oil of cinnamon camphor. 6.21%, which is 4.1 times of the steam distillation method extraction rate (1.50%); using GC-MS to analyze the extracted essential oil components, the content of 1,8-cineole in the essential oil is 58.92%, which is 4.1 times higher than that of the steam distillation method. 1.8 times that of (32.65%).

Embodiment 3

[0030] Fresh Cinnamomum camphora leaves are crushed with a pulverizer and passed through a 20-mesh sieve; 5.0g Cinnamomum camphora leaf powder is weighed in a 50mL three-necked bottle, and 20.0g of 1,3-diisobutylimidazole acetate ionic liquid is added to control The temperature of the water bath is 40°C, the working frequency of the ultrasonic circulation extractor is 40KHz, the output power is 500W, and the ultrasonic-assisted extraction is 3 hours; after the extraction is completed, the oil-water mixture is obtained by distillation under reduced pressure, and the liquid is separated. The upper layer is the essential oil of cinnamon camphor. The extraction rate is 7.10%, which is 4.7 times of the steam distillation extraction rate (1.50%); the extracted essential oil components are analyzed by GC-MS, and the content of 1,8-cineole in the essential oil is 60.07%, which is the highest extraction rate of steam distillation. 1.8 times that of the law (32.65%).

[0031] A typical ...

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Abstract

The invention provides a method for extracting cinnamomum camphora essential oil enriched with 1,8-cineole by using an ionic liquid as a green medium. The method comprises the following steps: (1) smashing fresh leaves of cinnamomum camphora by using a pulverizer, and performing sieving by using a 20-mesh sieve; and weighing cinnamomum camphora leaf powder into a bottle, adding a certain amount ofthe ionic liquid, and performing ultrasonic-assisted extraction for a certain time, wherein the working frequency of an ultrasonic circulating extractor is 40KHz, and the output power is 500W; (2) after extraction is completed, performing vacuum distillation to obtain a mixture of oil and water, and performing liquid separation, wherein the upper layer is the cinnamomum camphora essential oil; and (3) adding deionized water into a flask subjected to vacuum distillation to dissolve the ionic liquid, and performing centrifugation, wherein the upper layer is a mixture of the ionic liquid and water, and the lower layer is residual leaf residues and biomass components; and performing concentration on an upper layer liquid to remove most of the water, then adding activated carbon, performing reflux, performing filtration, performing concentration on the filtrate to obtain the ionic liquid, and repeating the above steps to realize recycling of the ionic liquid. The method provided by the invention is used to extract the cinnamomum camphora essential oil, the content of the 1,8-cineole in the essential oil is 1.5-2.0 times of that of a steam distillation method, the extraction rate of theessential oil is high, the ionic liquid can be recycled and reused, and the technology is green, high-efficiency and environmentally friendly.

Description

technical field [0001] The invention relates to a method for extracting linoleum essential oil enriched in 1,8-cineole by using ionic liquid as a green medium. Background technique [0002] Cinnamomum camphora is one of the main tree species that produce natural spices in my country. The leaves, branches, roots, stems, fruits and skins of Cinnamomum camphora can be used to extract Cinnamomum camphor essential oil, which contains linalool, 1,8-cineole, The main components such as terpineol and borneol are important raw materials in the fields of food, medicine, cosmetics and tobacco. At present, steam distillation, simultaneous-distillation extraction and supercritical extraction are mainly used to extract cinnamon essential oil from cinnamon leaves, but these methods have low yield, complicated equipment or long distillation time and high heating temperature. And make the essential oil aroma distortion and other obvious defects. Therefore, finding novel methods for extracti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02C07D493/08
CPCC07D493/08C11B9/022C11B9/025C11B9/027
Inventor 李明杨成曹光群
Owner JIANGNAN UNIV
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