Method for supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves

a technology of characteristic aromatic substances and supercritical co2 fluid, which is applied in the field of supercritical co2 fluid extraction of characteristic aromatic substances in different fragrant tobacco leaves, can solve the problems of large change in solubility of solutes, and achieve the effects of non-toxic, simple and reproducible process, and high reliability

Inactive Publication Date: 2013-09-19
SHANGHAI TOBACCO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022]In view that the fragrance style of tobacco leaves is currently determined primarily through evaluation smoking by experts, and unified objective standards are absent, the present invention provides a method for extraction of characteristic fragrant substances, which is applicable to different fragrant tobacco leaves. By analyzing the correlation between the fragrant ingredients in the extract obtained through the method and the fragrance of tobacco leaves, the internal relationship between the type and the content of the fragrant ingredient and the fragrance of tobacco leaves could be found, so that the analysis of fragrant ingredients extracted from the tobacco leaves can be used as an objective standard for evaluation of the fragrance of tobacco leaves. Therefore, the extraction method of the present invention is an efficient means for objectively estimating the fragrance of tobacco leaves, and establishes the foundation for providing a unified method for evaluation of fragrance styles of tobacco leaves.
[0023]In the present invention, food grade supercritical CO2 fluid is used as the working medium, and the characteristic fragrant substances in different tobacco leaves are extracted through static extraction and dynamic extraction in combination. In the extraction method of the present invention, no entrainer is used, and the method has the advantages of being safe and non-toxic, is a simple and reproducible process, and has high reliability.

Problems solved by technology

Small changes in temperature and pressure may result in a large change in solubility of the solute.

Method used

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  • Method for supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves
  • Method for supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves
  • Method for supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves

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Effect test

embodiment 1

[0031]Key fragrant ingredients in Guizhou intermediate-fragrance tobacco leaves, Yunnan mild-fragrance tobacco leaves, and He'nan strong-fragrance tobacco leaves were each extracted by adopting the following method, including the following steps:

[0032]1) cutting tobacco leaves into shreds of 0.8 mm to 1.2 mm;

[0033]2) placing 5 g tobacco shreds into an extraction vessel with supercritical CO2 fluid;

[0034]3) setting the static extraction pressure and the extraction temperature of the supercritical CO2 fluid to 290 bar and 50° C.;

[0035]4) performing static extraction on the tobacco shreds for 30 min under a static extraction condition;

[0036]5) setting the CO2 dynamic extraction flow rate to 2.5 L / min;

[0037]6) performing dynamic extraction on the tobacco shreds for 10 min under a dynamic extraction condition;

[0038]7) collecting the supercritical CO2 fluid extract by using a clean glass bottle, and after complete evaporation of CO2, adding 3 mL anhydrous ethanol to dissolve the extract f...

embodiment 2

[0040]By adopting the extraction method in Embodiment 1, the three types of tobacco shred samples were subjected to continuous five-time supercritical CO2 fluid extraction, and the extract of each type of tobacco leaves obtained by each extraction was subjected to gas chromatography / mass spectrometry analysis. The analysis results show that, with the increase of the number of times of extraction, the content of the fragrant ingredients in the extracts of the three types of tobacco leaves (tobacco shreds) are significantly decreased, and the content of the fragrant ingredients in the first-time extract is much greater than those of the following extracts, indicating that the fragrant ingredients in the tobacco leaves can be substantially extracted through one-time extraction.

[0041]The three types of tobacco leaves (tobacco shreds) after the supercritical CO2 fluid extraction were rolled into cigarettes, subjected to smoke panel tests, and compared with tobacco leaves (tobacco shreds)...

embodiment 3

[0043]In order to study the repeatability of the method of the present invention, by adopting the extraction method in Embodiment 1, certain fragrant tobacco leaf samples were subjected to continuous five-time supercritical CO2 fluid extraction, and the extract of the tobacco leaves obtained by each extraction was subjected to gas chromatography / mass spectrometry analysis. The analysis results are shown in FIG. 5. The detection results show that the method of the present invention has good repeatability and high reliability.

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Abstract

A supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves, which involves the following steps: 1) cutting the tobacco leaves into shreds and placing the shreds into an extraction vessel with supercritical CO2 fluid; 2) setting the extraction pressure and extraction temperature of supercritical CO2 fluid about 100 to 350 bar and 35 to 70° C., extracting statically the tobacco shreds for 10 to 35 minutes in the condition, then setting the dynamic extracting speed of the supercritical CO2 fluid about 1.0 to 3.5 L/min, and extracting dynamically the tobacco shreds for 5 to 15 minutes; 3) collecting the obtained supercritical CO2 fluid extract, and obtaining the key fragrant substances, which act as the determinants for tobacco fragrance, after completely volatilizing CO2.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field of the Invention[0002]The present invention relates to a method for extraction of characteristic fragrant substances in tobacco leaves, and in particular, to a method for supercritical CO2 fluid extraction of characteristic fragrant substances in different fragrant tobacco leaves, and belongs to the tobacco field.[0003]2. Description of the Related Art[0004]The fragrances of flue-cured tobacco leaves are mainly classified into strong fragrance, mild fragrance and intermediate fragrance, and further include intermediary fragrances such as strong-to-intermediate fragrance, intermediate-to-strong fragrance, mild-to-intermediate fragrance, intermediate-to-mild fragrance, mild-over-strong fragrance, and strong-over-mild fragrance. After long-term development, characteristic types of tobacco leaves with certain geographical features have been formed in production of tobacco leaves in China; for example, mild fragrance flue-cured tobacco ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A24B15/24
CPCA24B15/241A24B15/24
Inventor SUN, WENLIANGZHANG, HAOBOLIU, BAIZHAN
Owner SHANGHAI TOBACCO GRP CO LTD
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