Preparation method of high-nicotine tobacco extract

Abstract

The invention discloses a preparation method of a high-nicotine tobacco extract. The preparation method of the high-nicotine tobacco extract belongs to the field of tobacco additives, and mainly comprises three steps of raw material pretreatment, subcritical extraction and molecular distillation. A baking process is adopted for pretreating tobacco leaves, so that reducing sugar of tobacco and a nitrogen-containing compound are promoted to generate maillard reaction, substances such as pyrone and furanone are produced, the baking aroma is improved, the reducing sugar content is reduced, the suction offensive odor is reduced, meanwhile, combined-state nicotine in the tobacco leaves is converted into a free state, and the content of the free-state nicotine is improved. A weak polar solvent is adopted for subcritical extraction, so that the extraction rate of tobacco feature aroma substances and the free-state nicotine can be improved; and low-temperature molecular distillation is combined, so that low-boiling-point aroma substances and the nicotine can be effectively enriched, the damage on thermosensitive substances due to high temperature is avoided, and meanwhile, the content of macromolecular substances such as pectin and protein in an extract is reduced. The method is simple in preparation process, simple and convenient to operate, and suitable for industrial production and application.

Description

technical field [0001] The invention relates to a preparation method of high-nicotine tobacco extract, which belongs to the field of tobacco additives. Background technique [0002] In recent years, with the effective implementation of the Framework Convention on Tobacco Control, the gradual expansion of the scope of smoking bans in public places around the world, and consumers' increasing concern for their own health, the research and development of low-tar cigarette products has become increasingly important. But at the same time, it is inevitable that the aroma and taste of cigarettes will decline, and adding flavor to cigarettes is an important method to improve the taste. [0003] Tobacco extract is extracted from tobacco and contains tobacco's original aroma-causing substances. Compared with natural flavors, tobacco extract has better harmony with cigarettes and can enhance the aroma of cigarettes. [0004] Common methods for preparing tobacco extracts include solvent...

AI Technical Summary

Problems solved by technology

Currently commercially available tobacco extracts are mostly extracted with different concentrations of ethanol as a solvent. This method has two major disadvantages: ① part of the aroma components are lost during the extraction process, and the aroma of the product is weak; ② in addition to the aroma components in the product, there are also There are pectin, protein, and hemicellulose substances, which will be cracked to produce some harmful components during the smoking process of cigarettes, and at the same time increase the irritation and miscellaneous gas of smoking, and affect the sensory quality (Song Peng. Research on Harmful Components in Air and Improvement of Cigarette Quality[D]. Xi'an: Northwest University, 2008.; Chi Jingji, et al. Correlation Analysis between Main Chemical Indexes of Tobacco Leaf and Smoking Quality[J]. Journal of Agricultural Sciences of Yanbian University ,2006,28(3):208-210.)

However, ethanol and water are highly polar solvents, and the obtained extracts are mainly composed of highly polar and non-volatile components. In addition, high-temperature heating and extraction will easily cause the loss of some heat-sensitive and volatile aroma components. Even if molecular distillation technology is used to separate and enrich Light components, but the small and medium polar aroma components lost in the early stage can no longer be made up

The invention patent of publication number CN104687241A uses shredded stems, low-grade shredded tobacco or other natural products as raw materials, sequentially extracts them with low, medium, and high polarity solvents, and then mixes and dissolves the extracted extract with ethanol and / or propylene glycol to obtain tobacco that can improve the combustion of cut stems. Smoking quality tobacco liquid, in which low-polarity solvents such as petroleum ether, cyclohexane or n-hexane, medium-polarity solvents ether, acetone, dichloromethane or ethyl acetate, high-polarity solvents methanol or acetic acid, these solvents are mostly It is a volatile, flammable and toxic solvent, which has high requirements for industrial production equipment and personnel, is difficult to operate and has high extraction costs

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