Tobacco absolute as well as byproducts, preparation method and application thereof

Abstract

The invention belongs to the field of tobacco flavor extracts, and discloses a tobacco absolute, a byproduct, a preparation method and application, and the preparation method of the tobacco absolute comprises the following steps: adsorbing a tobacco extract on a cotton carrier to form a wet extraction raw material, and then carrying out supercritical extraction and molecular distillation separation to obtain the tobacco absolute and heavy components, according to the method, cotton is adopted as an adsorption carrier to pretreat the tobacco extract, the blistering phenomenon in the direct extraction process is effectively avoided, the enriched extract instead of a tobacco body is adopted as a raw material for supercritical extraction, the content of non-volatile impurities such as solid wax and resin in the extract is remarkably reduced, and the tobacco absolute is obtained. The subsequent molecular distillation separation process is simplified.

Description

Technical Field

[0001] This invention belongs to the field of tobacco aroma extracts, specifically relating to a tobacco pure oil and its by-products, preparation method and application. Background Technology

[0002] Tobacco pure oil is a refined flavoring substance extracted from tobacco raw materials. It is mainly rich in the original aroma components of tobacco and has the characteristics of natural, harmonious and full aroma. It is widely used in cigarette flavoring, which can significantly enhance the main aroma of cigarettes, make up for the original aroma of tobacco leaves, highlight the style characteristics of cigarettes, reduce off-flavors and improve sensory quality.

[0003] Common methods for preparing tobacco purified oil include organic solvent extraction, supercritical CO2 fluid extraction, and a combination of supercritical extraction and molecular distillation. Among these, supercritical CO2 extraction is widely used due to its green nature, absence of solvent residue, and high selectivity. It is often performed directly using tobacco leaves or tobacco dust as raw materials. The extract is then separated into light and heavy components by molecular distillation to obtain the purified oil product. This technology offers advantages such as high extraction efficiency and good product purity.

[0004] In existing technologies, when using supercritical fluid extraction to directly process tobacco raw materials, the extract often contains a large amount of non-volatile impurities such as solid waxes and resins. These waxy components increase the difficulty of separation in subsequent molecular distillation processes, reduce the yield of purified oil, and result in insufficient aroma purity. At the same time, direct extraction of the tobacco itself is prone to foaming, affecting the stable operation of the extraction equipment and mass transfer efficiency, thus limiting the scale-up and industrial application of the process. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing tobacco purified oil and its by-products, wherein the tobacco purified oil is rich in tobacco aroma components and has a good aroma-enhancing effect.

[0006] Another objective of this invention is to provide applications of the aforementioned tobacco purified oil and its byproducts.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention provides a method for preparing tobacco purified oil, the method comprising the following steps:

[0009] 1) Soak cotton and tobacco extract to absorb the extract and obtain wet extraction raw materials;

[0010] 2) The wet extraction raw material is subjected to supercritical extraction to obtain the extract and cotton extract;

[0011] 3) The extract is subjected to molecular distillation to prepare tobacco pure oil and heavy components.

[0012] In step 1), the mass ratio of tobacco extract to cotton is 1-3:1.

[0013] In step 2), the parameters for supercritical extraction are: CO2 flow rate 10-30 L / h, extraction time 90-120 min, extraction temperature 30-50 ℃, and extraction pressure 10-30 MPa.

[0014] In step 3), the parameters for molecular distillation are: heating temperature 70-120 ℃, vacuum degree 300-800 Pa, and internal cooling 5-20 ℃.

[0015] This invention provides a tobacco purified oil prepared using the above-described preparation method.

[0016] This invention provides a tobacco oil purification by-product, which is a concentrate obtained by extracting and concentrating the cotton extract.

[0017] This invention provides a method for preparing a tobacco purified oil by-product, the method comprising the following steps:

[0018] 1) The cotton extract was extracted to obtain an extract solution;

[0019] 2) The extract is concentrated to obtain the tobacco purified oil by-product.

[0020] The extraction solution used in step 1) is a mixture of water and ethanol, wherein the mass fraction of ethanol in the mixture is 60%.

[0021] The present invention also provides the application of the tobacco purified oil or tobacco purified oil by-product in tobacco products, the tobacco products including one or more of cigarettes, cigars, shredded tobacco, re-dried tobacco leaves or tobacco leaves.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. In this invention, tobacco extract is first adsorbed onto a cotton carrier and then subjected to supercritical extraction, which effectively inhibits foaming during the extraction process and improves extraction mass transfer efficiency and equipment operation stability.

[0024] 2. Adsorbing tobacco extract onto a cotton carrier to form a wet raw material followed by supercritical CO2 extraction can significantly reduce the solid wax content in the extract while effectively enriching the raw material, facilitating large-scale industrial applications. Specifically, the extract has already partially removed wax through initial solvent extraction. After adsorption onto cotton, the aroma components are evenly dispersed, while the wax is easily encapsulated and retained by the fibers. Supercritical CO2 preferentially extracts well-exposed and highly soluble aroma components, limiting wax dissolution and thus significantly reducing the total wax content. This avoids the problem of excessive wax when directly extracting tobacco, improving molecular distillation efficiency, oil yield, and aroma purity. At the same time, the extract is a concentrated concentrate, and its density after adsorption onto cotton is much higher than that of loose tobacco leaves, increasing the amount of material loaded into the extraction vessel. The carrier improves CO2 penetration and mass transfer, shortens the extraction time, and reduces energy consumption.

[0025] 3. The solid material of the extracted cotton extract is re-extracted and concentrated with ethanol solution to obtain by-product concentrate, realizing the secondary recovery of residual aroma components and improving the overall resource utilization rate. Attached Figure Description

[0026] Figure 1 The image shows the GC-MS total ion chromatogram of the tobacco purified oil and heavy components prepared in Example 1. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Unless otherwise specified, all test materials and reagents used in the following examples are commercially available.

[0029] Example 1

[0030] A method for preparing tobacco purified oil, the method comprising the following steps:

[0031] 1) Soak cotton and tobacco extract at a mass ratio of 3:1 to obtain wet extraction raw materials;

[0032] 2) The wet extraction raw material was subjected to supercritical extraction for 120 min at an extraction temperature of 40℃, an extraction pressure of 20 MPa and a CO2 flow rate of 20 L / h to obtain the extract and cotton extract.

[0033] 3) The extract was subjected to molecular distillation at a heating temperature of 70°C, a vacuum of 300 Pa, and an internal cooling temperature of 5°C to prepare tobacco pure oil and heavy components.

[0034] A method for preparing a tobacco purified oil by-product, the method comprising the following steps:

[0035] 1) The cotton extract obtained in step 2) of the preparation method of tobacco pure oil in this embodiment is extracted with an ethanol-water mixture solution with a mass fraction of 60% to obtain an extract;

[0036] 2) The extract was concentrated under reduced pressure at 55°C to obtain the tobacco purified oil by-product.

[0037] Example 2

[0038] A method for preparing tobacco purified oil, the method comprising the following steps:

[0039] The difference between this embodiment and Embodiment 1 is that the extraction time in step 2) is changed from 120 min in Embodiment 1 to 90 min, and the main heating of the molecular distillation in step 3) is changed from 70℃ to 90℃.

[0040] A method for preparing a tobacco purified oil by-product, wherein the preparation method is the same as in Example 1.

[0041] Comparative Example 1

[0042] The difference between this comparative example and Example 1 is that step 1) is omitted, and the wet extraction raw material described in step 2) is replaced with tobacco extract. The rest is the same as in Example 1.

[0043] Test Example 1

[0044] Sensory quality evaluation:

[0045] The tobacco purified oil by-products, tobacco purified oil, and heavy components obtained in each embodiment and comparative example were diluted with 50% ethanol and injected into blank cigarettes at a dosage of 1 / 1000 of the weight of blank cigarettes to obtain test cigarette samples. Sensory quality was evaluated using a comparative method. The evaluation team consisted of qualified smoke testers from the flavoring room of the technical center. The evaluation results are shown in Table 1 below:

[0046] Table 1 Sensory Evaluation

[0047]

[0048] As shown in Table 1, the use of supercritical-molecular distillation coupling technology to mix tobacco extract with cotton produces high-quality tobacco oil that significantly reduces the irritation of flue-cured tobacco while also providing a pure and pleasant aroma.

[0049] GC-MS characterization

[0050] Figure 1The GC-MS total ion chromatograms of the tobacco purified oil and heavy components prepared in Example 1 are shown below. Figure 1 It can be seen that molecular distillation equipment can be used to separate supercritical extracts and obtain light and heavy components with different compositions.

[0051] It should be noted that the above embodiments are merely some preferred embodiments of the present invention, and not all embodiments. Obviously, based on the above embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] The above description of the embodiments is intended to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for preparing tobacco puree, characterized in that, The preparation method includes the following steps: 1) Soak cotton and tobacco extract to absorb the extract and obtain wet extraction raw materials; 2) The wet extraction raw material is subjected to supercritical extraction to obtain the extract and cotton extract; 3) The extract is subjected to molecular distillation to prepare tobacco pure oil and heavy components.

2. The method for preparing tobacco purified oil according to claim 1, characterized in that, In step 1), the mass ratio of tobacco extract to cotton is 1-3:

1.

3. The method for preparing tobacco purified oil according to claim 1, characterized in that, In step 2), the parameters for supercritical extraction are: CO2 flow rate 10-30 L / h, extraction time 90-120 min, extraction temperature 30-50 ℃, and extraction pressure 10-30 MPa.

4. The method for preparing tobacco purified oil according to claim 1, characterized in that, In step 3), the parameters for molecular distillation are: heating temperature 70-120 ℃, vacuum degree 300-800 Pa, and internal cooling 5-20 ℃.

5. A tobacco pure oil prepared by the preparation method as described in claim 1.

6. A tobacco purification by-product, characterized in that, The tobacco oil by-product is the concentrate obtained by extraction and concentration of the cotton extract described in step 2) of claim 1.

7. A method for preparing the tobacco purified oil by-product as described in claim 6, characterized in that, The preparation method includes the following steps: 1) The cotton extract was extracted to obtain an extract solution; 2) The extract is concentrated to obtain the tobacco purified oil by-product.

8. The method for preparing the tobacco purified oil by-product according to claim 7, characterized in that, The extraction solution used in step 1) is a mixture of water and ethanol, wherein the mass fraction of ethanol in the mixture is 60%.

9. The use of the tobacco puree as described in claim 5 in tobacco products, wherein the tobacco products include one or more of cigarettes, cigars, shredded tobacco, re-dried tobacco leaves, or tobacco leaves.

10. The use of the tobacco oil by-product as described in claim 6 in tobacco products, wherein the tobacco products include one or more of cigarettes, cigars, shredded tobacco, re-dried tobacco leaves, or tobacco leaves.

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