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Method for removing terpene from essential oil

A technology for deterpenes and essential oils, which is applied in the fields of fat oil/fat refining, fat oil/fat separation, fat production, etc. It can solve the problems of low recovery rate, low purity of oxygen-containing terpenoids, and low purity of linalool. And other issues

Active Publication Date: 2020-07-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for deterpening essential oils mainly include vacuum distillation, supercritical fluid method, microwave-assisted extraction method, membrane separation method, etc. These methods have the problems of low purity and low recovery of oxygenated terpenoids
For example, people such as Raeissi S use supercritical ethane to deterpene orange essential oil under the conditions of 100°C, 6.08MPa, and solvent / raw material mass ratio of 56, and the content of linalool is increased from 0.88% (mol fraction) to 6.71 %, but the purity of linalool in essential oils has not yet reached a high level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 5wt.% linalool + 95wt.% limonene was used as the simulated essential oil. Tetrabutylammonium bromide was selected as the association extraction agent for association extraction, the mass ratio of tetrabutylammonium bromide to linalool was 20:1; the stirring temperature of association extraction was 50°C, the time was 1h, and static Set the temperature at 30° C. for 4 hours to obtain a limonene phase and a deep eutectic solvent phase containing linalool.

[0047] Detected by gas chromatography, the distribution coefficient of linalool is 14, the selectivity is 104, and the extraction rate is 96.5%.

[0048] A two-step stripping operation was performed on the deep eutectic solvent phase containing linalool. In the first step of stripping operation, n-hexane is selected as the stripping agent, and multi-stage cross-flow stripping is carried out to completely separate limonene from the deep eutectic solvent phase in the association extraction process, so as to achieve the ...

Embodiment 2

[0052] 4.5wt.% linalool + 95.5wt.% limonene was used as the simulated essential oil. Tetrabutylammonium chloride was selected as the association extraction agent for association extraction, and the mass ratio of tetrabutylammonium chloride to linalool was 30:1; the stirring temperature of association extraction was 55° C., and the time was 1 h. The temperature is 45° C., and the time is 4 hours to obtain a limonene phase and a deep eutectic solvent phase containing linalool.

[0053] Detected by gas chromatography, the distribution coefficient of linalool is 12, the selectivity is 84, and the extraction rate is 96.6%.

[0054] A two-step stripping operation was performed on the deep eutectic solvent phase containing linalool. In the first step of stripping operation, n-hexane is selected as the stripping agent, and multi-stage cross-flow stripping is carried out to completely separate limonene from the deep eutectic solvent phase in the association extraction process, so as t...

Embodiment 3

[0057] 5.5wt.% linalool + 94.5wt.% limonene was used as the simulated essential oil. Tetrabutylammonium chloride was selected as the association extraction agent for association extraction, and the mass ratio of tetrabutylammonium chloride to linalool was 20:1; the stirring temperature of association extraction was 45° C., and the time was 3 hours. The temperature is 45° C., and the time is 3 hours to obtain a limonene phase and a deep eutectic solvent phase containing linalool.

[0058] Detected by gas chromatography, the distribution coefficient of linalool is 13, the selectivity is 93, and the extraction rate is 95%.

[0059]A two-step stripping operation was performed on the deep eutectic solvent phase containing linalool. In the first step of stripping operation, n-heptane is selected as the stripping agent, and multi-stage cross-flow stripping is carried out to completely separate limonene from the deep eutectic solvent phase in the association extraction process, so as...

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Abstract

The invention provides a method for removing terpene from essential oil, and belongs to the technical field of essential oil purification. According to the method, an organic salt association extraction agent is used for association extraction, the selectivity, the partition coefficient and the extraction rate are high in the extraction process, the organic salt association extraction agent and the oxygen-containing terpenoids can form the eutectic solvent, efficient extraction of the oxygen-containing terpenoids is achieved, and then most terpenes are separated out. Through two times of backextraction processes, terpene and the oxygen-containing terpenoids can be completely separated, and the purity and the recovery rate of the obtained oxygen-containing terpenoids are very high. Meanwhile, the method provided by the invention is simple to operate, low in energy consumption and free of side reaction. Results of embodiments show that the purity of the oxygen-containing terpenoids obtained by the method for removing terpenes from essential oil provided by the invention can reach 99%, and the recovery rate can reach 95%.

Description

technical field [0001] The invention relates to the technical field of essential oil purification, in particular to a method for deterpening essential oils. Background technique [0002] With the continuous development of society and the improvement of people's living standards, people pay more and more attention to the naturalness, health and safety of materials. As a natural product from plants, essential oils have characteristic aroma, antioxidant, antibacterial, and insecticidal effects, and are widely used in industries such as spices, food, cosmetics, and medicine. [0003] Essential oils are complex mixtures of terpenes, oxygenated terpenoids, and small amounts of nonvolatile substances. Terpenes are unsaturated hydrocarbons that contribute little to the aroma of essential oils. Terpenes are easily decomposed under light, heat and air conditions, which is not conducive to the preservation and use of essential oils; in contrast, oxygen-containing terpenoids have Bett...

Claims

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Application Information

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IPC IPC(8): C11B7/00C11B3/00
CPCC11B7/0058C11B3/006
Inventor 成洪业漆志文陈立芳李姜无忌
Owner EAST CHINA UNIV OF SCI & TECH
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