Tobacco processing method for separating top note, body note, and base note, and aerosol generation substrate

Abstract

The present application relates to the technical field of tobacco processing, and in particular to a tobacco processing method for separating a top note, a body note, and a base note, and an aerosol generation substrate. The method comprises the following steps: S1: adding an extraction solvent to tobacco raw materials, and performing extraction at -18°C to -5°C to obtain a crude tobacco extract; S2: performing molecular distillation on the crude tobacco extract at 90-120°C to obtain a top note and a primary molecular distillation residue; S3: performing molecular distillation on the primary molecular distillation residue at 130-170°C to obtain a body note and a base note; and S4: respectively performing adsorption decolorization treatment on the top note, the body note, and the base note, wherein the extraction solvent in S1 comprises ethanol, petroleum ether, and ethyl acetate in a volume ratio of (1-7):(1-7):(1-2). The method can achieve efficient separation of the top note, body note and base note of tobacco, and the obtained respective notes have high aroma intensity and are naturally coordinated, facilitating supplementation of specific aromas according to blending requirements.

Description

Tobacco processing methods for separating top notes, middle notes, and base notes, and aerosol generation matrix

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024119944437, filed with the Chinese Patent Office on December 30, 2024, entitled "Tobacco Processing Method for Separating Top Note, Body Note and Base Note and Aerosol Generation Matrix", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of tobacco processing technology, specifically relating to a tobacco processing method for separating top notes, body notes, and base notes, and an aerosol generation matrix. Background Technology

[0004] Like perfumery, tobacco product fragrance blending emphasizes the proper blending of top notes, body notes, and base notes. Separating tobacco extracts into these three categories allows perfumers to easily add specific aromas according to their fragrance needs. Summary of the Invention

[0005] Therefore, the purpose of this application is to provide a tobacco processing method and an aerosol generation matrix for separating top notes, body notes and base notes. This method uses cold extraction combined with molecular distillation technology, which can easily separate the top notes, body notes and base notes from tobacco components, and the aroma intensity is high and naturally harmonious, so as to make it easier to add specific aromas according to needs during flavoring.

[0006] Therefore, this application provides the following technical solution.

[0007] This application provides a method for separating top notes, body notes, and base notes in tobacco processing, comprising the following steps: S1: adding an extraction solvent to tobacco raw materials and extracting at -18 to -5°C to obtain crude tobacco extract; S2: performing molecular distillation on the crude tobacco extract at 90 to 120°C to obtain top notes and a residue from a first molecular distillation; S3: performing molecular distillation on the residue from the first molecular distillation at 130 to 170°C to obtain body notes and base notes; S4: performing adsorption and decolorization treatment on the top notes, body notes, and base notes respectively; in S1, the extraction solvent includes ethanol, petroleum ether, and ethyl acetate in a volume ratio of (1 to 7): (1 to 7): (1 to 2); in S3, the body notes are the light components distilled out by molecular distillation, and the base notes are the collected heavy components.

[0008] The tobacco processing method for separating top notes, body notes, and base notes provided in this application yields top notes with a relative molecular weight of ≤150, body notes with a relative molecular weight of 150 to 250, and base notes with a relative molecular weight of ≥250.

[0009] In the tobacco processing method for separating top notes, body notes and base notes provided in this application, step S1, after extraction, also includes a step of removing the extraction solvent.

[0010] Optionally, the adsorption decolorization process includes: using the top note, body note, and base note as components to be treated, dissolving the components to be treated in an ethanol solution, adding a mixture of silica gel and alumina, and performing adsorption decolorization under stirring to obtain refined top note, body note, and base note products respectively.

[0011] Optionally, the adsorption and decolorization temperature is 50–70℃, and the time is 1.5–3 hours.

[0012] Optionally, in the silica gel and alumina mixture, the mass ratio of silica gel to alumina is 9:1 to 7:3.

[0013] Optionally, the mass ratio of the component to be treated to the ethanol solution is 1:1 to 1:5.

[0014] Optionally, the mass of the silica gel and alumina mixture is 0.8% to 2% of the component to be treated.

[0015] Optionally, after the adsorption and decolorization are completed, the step of separating the ethanol solution is also included.

[0016] Optionally, the mass concentration of the ethanol solution is 80 wt% to 95 wt%.

[0017] Optionally, in step S1, the extraction time is 5 to 12 hours.

[0018] Optionally, in S1, the mass-to-volume ratio of tobacco raw material to extraction solvent is 1g:8-12mL.

[0019] Optionally, the extraction solvent is ethanol, petroleum ether, or ethyl acetate in a volume ratio of 3:3:1.

[0020] Optionally, in S1, the extraction method includes at least one of immersion extraction, stirring extraction, and percolation extraction.

[0021] Optionally, the size of the tobacco raw material is 20 to 30 mesh.

[0022] Optionally, in step S2, the feed rate for molecular distillation is 300–500 mL / h, and the vacuum degree is 1 × 10⁻⁶. -1 mbar ~ 5×10 -1 mbar.

[0023] Optionally, in step S2, propylene glycol and / or glycerol are used as the carrier for molecular distillation, and the mass of the carrier is 30% to 100% of the crude tobacco extract.

[0024] Optionally, in step S3, the feed rate for molecular distillation is 300–500 mL / h, and the vacuum degree is 5 × 10⁻⁶. -2 mbar~1×10 -1 mbar.

[0025] Optionally, in step S3, propylene glycol and / or glycerol are used as the carrier for molecular distillation, and the mass of the carrier is 30% to 100% of the residue from a single molecular distillation.

[0026] Optionally, in S2 and S3, the apparatus used for molecular distillation includes any one of a static molecular distillation apparatus, a falling film molecular distillation apparatus, a centrifugal molecular distillation apparatus, and a scraped film molecular distillation apparatus; optionally, when using a scraped film molecular distillation apparatus, the scraper rotation speed is 250 to 300 rpm.

[0027] This application provides an aerosol-generating matrix comprising a top note, a body note, and a base note, wherein the mass ratio of top note:body note:base note is 1–10:1–10:1–8; optionally, the top note comprises neophytadiene and 2-hydroxy-3-methyl-2-cyclopentenone; optionally, the body note comprises solanone, hyoscyamine, 9-hydroxy-4,7-megasiendin-3-one, damascene, β-guaiacene, megasiendinone, and nicotine; optionally, the base note comprises cephalothrixrindiol. Typically, but not limited to, the top note, body note, and base note are obtained by the tobacco processing method described above for separating the top note, body note, and base note.

[0028] Optionally, the aerosol generating matrix satisfies at least one of the following conditions, with each content calculated based on the dry matter content of the aerosol generating matrix:

[0029] (1) The content of solanone is 6-120 mg / kg;

[0030] (2) The content of neophytadiene is 75-1195 mg / kg;

[0031] (3) The content of 9-hydroxy-4,7-metazodiene-3-one is 15-140 mg / kg;

[0032] (4) The content of cephalothrix trienyl alcohol is 3935-66160 mg / kg;

[0033] (5) The content of megastigmatrienone is 6-1042 mg / kg;

[0034] (6) Nicotine content is 100-1670 mg / kg;

[0035] (7) The content of hyoscyamine is 25-435 mg / kg;

[0036] (8) The content of trabesone is 0.1-2 mg / kg;

[0037] (9) The content of 2-hydroxy-3-methyl-2-cyclopentenone is 0.45~8mg / kg;

[0038] (10) The β-guaiacol content is 9.5-150 mg / kg.

[0039] In this application, dry matter refers to the components in the aerosol-generating matrix other than the solvent. The solvent may be an aqueous solution of ethanol, and the dry matter includes: neophytadiene, 2-hydroxy-3-methyl-2-cyclopentenone, solanone, hyoscyamine, 9-hydroxy-4,7-megasiendin-3-one, damascone, β-guaiacene, megasiendinone, nicotine, and cephalothrixtrienol.

[0040] The beneficial effects of this application are:

[0041] The tobacco processing method for separating top notes, body notes, and base notes provided in this application includes the following steps: S1: Adding an extraction solvent to the tobacco raw material and extracting at -18 to -5°C to obtain a crude tobacco extract; S2: Performing molecular distillation on the crude tobacco extract at 90 to 120°C to obtain a top note and a residue from the first molecular distillation; S3: Performing molecular distillation on the residue from the first molecular distillation at 130 to 170°C to obtain a body note and a base note; S4: Performing adsorption and decolorization treatment on the top notes, body notes, and base notes respectively; In S1, the extraction solvent includes ethanol, petroleum ether, and ethyl acetate in a volume ratio of (1 to 7): (1 to 7): (1 to 2). This method can effectively separate the top notes, body notes, and base notes of tobacco, and the obtained aromas are high in intensity, natural and harmonious, and convenient for supplementing specific aromas according to flavoring needs. The top notes enhance the olfactory and initial satisfaction of a product, thereby improving product quality; the body notes significantly increase the intensity and concentration of the aroma, forming the main fragrance; the base notes serve as the tail notes, supplementing the aftertaste, and can also be used as pyrolysis raw materials. After pyrolysis, the atomization performance can be improved, enhancing quality and thus increasing the utilization rate of raw materials. The processing method provided in this application only uses an extraction solvent with a specific composition and extracts in one step at -18 to -5°C to achieve crude extraction of effective components and removal of macromolecular substances such as starch, protein, cellulose, pectin, and waxes; the extraction efficiency is high, the aroma is pure, and the loss of aroma components is avoided, resulting in a higher aroma intensity and a more natural and harmonious aroma. Two molecular distillations are performed at different temperatures to achieve precise separation of top notes, body notes, and base notes. Furthermore, in step S3, molecular distillation is performed on the residue of the first molecular distillation at 130 to 170°C, achieving integrated distillation and reaction aroma enhancement, which can effectively increase the fresh, sweet, hay, and roasted aromas in the body notes. Adsorption and decolorization treatment of the top notes, body notes, and base notes can further purify them, reduce the residue of impurities, enrich the aroma-producing components, improve the atomization effect during subsequent use, and make the appearance of the top notes, body notes, and base notes products more attractive. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 shows images of the top note, middle note, and base note refined products obtained in Example 1; from left to right, they are top note, middle note, and base note.

[0044] Figure 2 shows images of the top notes, body notes, and base notes obtained in Comparative Example 4; from left to right, they are the top notes, body notes, and base notes. Detailed Implementation

[0045] The following embodiments are provided to better understand this application and are not limited to the preferred embodiments described herein. They do not constitute a limitation on the content and scope of protection of this application. Any product that is the same as or similar to this application, derived by anyone under the guidance of this application or by combining features of this application with other prior art, falls within the scope of protection of this application.

[0046] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0047] The petroleum ether used in this application has a boiling range of 60–90°C.

[0048] Example 1

[0049] This embodiment provides a tobacco processing method for separating top notes, body notes, and base notes, comprising the following steps:

[0050] (1) The tobacco leaves of Yun 87 were crushed into tobacco powder with a size of 20-30 mesh. The tobacco powder and extraction solvent were mixed at a mass-volume ratio of 1g:10mL. The extraction solvent was ethanol, petroleum ether and ethyl acetate with a volume ratio of 3:3:1. The mixture was extracted at -5℃ for 12h. The extraction solvent was then removed to obtain the crude tobacco extract.

[0051] (2) Add 33% by weight of propylene glycol as a carrier to the crude tobacco extract, and heat at 90°C under a vacuum of 5×10⁻⁶. -1 Molecular distillation was carried out in a scraped-film molecular distillation apparatus at mbar with a feed rate of 500 mL / h and a scraper rotation speed of 300 rpm. The separated light components were used as top notes, and the remaining part was the residue of the first molecular distillation.

[0052] (3) Add 50% by mass of propylene glycol as a carrier to the residue of the first molecular distillation, and heat at 140°C under a vacuum of 5×10⁻⁶. -2 Molecular distillation was carried out in a plate molecular distillation apparatus at mbar with a feed rate of 300 mL / h and a scraper rotation speed of 250 rpm. The separated light components were used as body fragrance, and the remaining part was used as base fragrance.

[0053] (4) The obtained top notes, body notes and base notes are used as the components to be treated. 95wt% ethanol of the same mass is added to the components to be treated and stirred until completely dissolved. 1% of the mass of the components to be treated is added to a mixture of silica gel and alumina (mass ratio of silica gel to alumina is 8:2). Adsorption and decolorization are carried out at 60°C with stirring for 2 hours. The silica gel and alumina mixture is removed by filtration and the ethanol is removed to obtain the refined top notes, body notes and base notes.

[0054] Images of the obtained top notes, middle notes, and base notes are shown in Figure 1.

[0055] Example 2

[0056] This embodiment provides a tobacco processing method for separating top notes, body notes, and base notes, comprising the following steps:

[0057] (1) The tobacco leaves of Yun 87 were crushed into tobacco powder with a size of 20-30 mesh. The tobacco powder and extraction solvent were mixed at a mass-volume ratio of 1g:8mL. The extraction solvent was ethanol, petroleum ether and ethyl acetate with a volume ratio of 7:7:2. The mixture was extracted at -18℃ for 5h. The extraction solvent was then removed to obtain the crude tobacco extract.

[0058] (2) Add 50% by weight of propylene glycol as a carrier to the crude tobacco extract, and heat at 120°C under a vacuum of 5×10⁻⁶. -1 Molecular distillation was carried out in a plate molecular distillation apparatus at mbar with a feed rate of 500 mL / h and a scraper rotation speed of 300 rpm. The separated light components were used as top notes, and the remaining part was the residue of the first molecular distillation.

[0059] (3) Add 70% by mass of propylene glycol as a carrier to the residue of the first molecular distillation, and heat at 170°C under a vacuum of 5×10⁻⁶. -2 Molecular distillation was carried out in a plate molecular distillation apparatus at mbar with a feed rate of 300 mL / h and a scraper rotation speed of 250 rpm. The separated light components were used as body fragrance, and the remaining part was used as base fragrance.

[0060] (4) The obtained top notes, body notes and base notes are used as the components to be treated. 95wt% ethanol is added to the components to be treated 5 times the corresponding mass. The mixture is stirred until completely dissolved. 2% of the mass of the components to be treated is added to a mixture of silica gel and alumina (mass ratio of silica gel to alumina is 7:3). The mixture is subjected to adsorption and decolorization at 70°C with stirring for 1.5 h. The mixture of silica gel and alumina is removed by filtration, and the ethanol is removed to obtain the refined top notes, body notes and base notes.

[0061] Example 3

[0062] This embodiment provides a tobacco processing method for separating top notes, body notes, and base notes, comprising the following steps:

[0063] (1) The tobacco leaves of Yun 87 were crushed into tobacco powder with a size of 20-30 mesh. The tobacco powder and extraction solvent were mixed at a mass-volume ratio of 1g:12mL. The extraction solvent was ethanol, petroleum ether and ethyl acetate with a volume ratio of 1:1:1. The mixture was extracted at -10℃ for 10h. The extraction solvent was then removed to obtain the crude tobacco extract.

[0064] (2) Add 40% propylene glycol by weight of the crude tobacco extract as a carrier, and heat at 100°C under a vacuum of 1×10⁻⁶. -1 Molecular distillation was carried out in a plate molecular distillation apparatus at mbar with a feed rate of 300 mL / h and a scraper rotation speed of 250 rpm. The separated light components were used as top notes, and the remaining part was the residue of the first molecular distillation.

[0065] (3) Add 60% by mass of propylene glycol as a carrier to the residue of the first molecular distillation, and heat at 130°C under a vacuum of 1×10⁻⁶. -1 Molecular distillation was carried out in a plate molecular distillation apparatus at mbar with a feed rate of 500 mL / h and a scraper rotation speed of 250 rpm. The separated light components were used as body fragrance, and the remaining part was used as base fragrance.

[0066] (4) Using the obtained top notes, body notes and base notes as the components to be treated, add 95wt% ethanol at twice the corresponding mass to the components to be treated, stir until completely dissolved, add 0.8% of the mass of the components to be treated, a mixture of silica gel and alumina (mass ratio of silica gel to alumina is 9:1), and perform adsorption and decolorization at 50°C with stirring for 3 hours. Filter to remove the silica gel and alumina mixture and remove the ethanol to obtain the refined top notes, body notes and base notes respectively.

[0067] Comparative Example 1

[0068] This comparative example provides a tobacco processing method for separating top notes, body notes and base notes. The only difference from Example 1 is that the extraction solvent used in step (1) is 95 wt% ethanol.

[0069] Comparative Example 2

[0070] This comparative example provides a method for separating top aroma, body aroma, and base aroma from tobacco processing. The only difference from Example 1 is that step (1) is as follows: flue-cured tobacco leaves of Yun 87 and extraction solvent are mixed in a mass-volume ratio of 1g:10mL. The extraction solvent is ethanol, petroleum ether, and ethyl acetate in a volume ratio of 3:3:1. The mixture is refluxed at 70°C for 2 hours. The refluxed extract is then removed of the extraction solvent to obtain a pre-treated product. The pre-treated product is redissolved in 95wt% ethanol at 13 times its mass, and then frozen at -18°C for 5 hours. The wax is removed by filtering with 600-mesh filter paper. The filtrate is then deethanolerated to obtain a crude tobacco extract.

[0071] Comparative Example 3

[0072] This comparative example provides a tobacco processing method, which differs from Example 1 only in that steps (2) and (3) are not performed, and the crude tobacco extract obtained in step (1) is used as the component to be processed in step (4).

[0073] Comparative Example 4

[0074] This comparative example provides a tobacco processing method for separating the top note, body note, and base note. The only difference from Example 1 is that step (4) is omitted. Images of the obtained top note, body note, and base note are shown in Figure 2. It can be seen that compared to Example 1, the top note, body note, and base note obtained in Comparative Example 4 are darker in color and more turbid, making them less aesthetically pleasing.

[0075] Comparative Example 5

[0076] This comparative example provides a tobacco processing method for separating top notes, body notes and base notes. The difference from Example 1 is that the distillation temperature in step (2) is 80°C and the distillation temperature in step (3) is 180°C.

[0077] Comparative Example 6

[0078] This comparative example provides a tobacco processing method for separating top notes, body notes and base notes. The only difference from Example 1 is that the extraction temperature in step (1) is 0°C.

[0079] Test Example 1

[0080] An aerosol generating matrix was prepared by combining 2 wt% of the top aroma, body aroma, and base aroma (mass ratio 2:2:1; comparative example 3 used 2 wt% of refined tobacco directly), 49 wt% of propylene glycol, and 49 wt% of glycerol. 2 mL of the above aerosol generating matrix was placed in a T65B heating element manufactured by Shenzhen Microwell Technology Co., Ltd., and a 6.5W sensory evaluation was conducted.

[0081] The aerosol-generating matrices obtained in the above embodiments and comparative examples were subjected to sensory evaluation according to the sensory evaluation methods in standards GB5606.4-2005, GB / T22366-2022, GB / T 12312-2012 and YCT / 138-1998.

[0082] The specific evaluation method is as follows: Aerosol-generating matrices obtained from each embodiment and comparative example were added to the T65B heating element. Ten professional sensory evaluators then sequentially evaluated the aroma, richness, harmony, penetration, purity, vapor production, sweetness, acidity, off-flavors, and satisfaction. The sensory evaluation conditions were: room temperature 25°C, air humidity 50%. Each time a test sample was changed, the user rinsed their mouth three times with saline and distilled water to ensure the objectivity and accuracy of the sensory test.

[0083] The scoring criteria for sensory evaluation are shown in Table 1, and the scoring results for sensory evaluation are shown in Table 2. In Table 1, except for the score range of 5-7, all score ranges include the lowest score but exclude the highest score. The score range of 5-7 includes 5 points and 7 points.

[0084] Table 1

[0085] Table 2

[0086] Test Example 2

[0087] The same top note, body note, and base note composition as in Test Example 1 was used. Top notes, body notes, and base notes prepared in the examples and comparative examples were also used. Key aroma components were extracted from each sample using liquid-liquid extraction and detected by gas chromatography-mass spectrometry (GC-MS). Specifically, 500 μL of sample was pipetted into a 1.5 mL centrifuge tube. 200 μL of deionized water and 500 μL of 10 ppm dichloromethane (containing 2-methyl-3-heptanone-2-octanol internal standard) were added to the centrifuge tube. The mixture was vortexed for 10 min at room temperature and then centrifuged at 6000 rpm for 5 min. The lower organic phase was pipetted through an organic filter membrane into an inner liner tube for GC-MS analysis. GC conditions: Column: DB-5MS (60m × 0.25mm × 0.25μm); Injection volume: 2μL; Split ratio: 10:1; Injector temperature: 200℃; Carrier gas: High-purity He; Flow rate: 1.5mL / min; Temperature program: 40℃ for 2 min, ramp to 150℃ at 3℃ / min and hold for 2 min, ramp to 300℃ at 5℃ / min and hold for 1 min, and finally ramp to 320℃ at 10℃ / min and hold for 1 min. MS conditions: Ion source temperature: 300℃; Transfer line temperature: 280℃; Scan range: m / z 33-350. Volatile compounds in the samples were retrieved by computer and qualitatively analyzed using the NIST 2.0 and Aroma Office mass spectrometry databases. Semi-quantitative analysis was performed using the internal standard method, and the content of each flavor compound in each sample, based on dry matter weight, was calculated according to the ratio of the peak area of ​​each flavor compound to the peak area of ​​the internal standard. The results are accurate to 0.01 μg / g (0.01 μg / g = 0.01 mg / kg).

[0088] The results are shown in Tables 3-5. In the tables, the top, middle, and base notes are listed from top to bottom as the contents of the corresponding substances in the top, middle, and base notes.

[0089] Table 3

[0090] Table 4

[0091] Table 5

[0092] Compared with Example 1, Comparative Example 1 used a different extraction solvent; Comparative Example 2 used a different extraction method for crude tobacco extract; Comparative Example 3 did not separate the top note, body note, and base note; Comparative Example 4 did not undergo adsorption decolorization treatment, and although the body note component in Comparative Example 4 contained daphne, the daphne content decreased after combining the top note, body note, and base note, failing to reach the detection limit; the molecular distillation temperature used in Comparative Example 5 was outside the range specified in this application; and the extraction temperature used in Comparative Example 6 was outside the range specified in this application. Based on the specific operations of the examples and comparative examples, and the materials and data in Tables 1-5, it was found that the extraction method, solvent, temperature, and time have a significant impact on the aroma component content of the material. Using inappropriate parameters or parameter ratios can lead to incomplete or over-extraction, such as low aroma intensity, low aroma concentration, low aroma richness, or a sensory bias towards burnt aroma, as well as problems like oral residue and heavy off-flavors. Molecular distillation parameters primarily affect the separation of aroma components. The parameters specified in this application allow for the complete separation of individual aroma components into a specific group, significantly impacting the sensory properties of different components. Appropriate process parameters can also improve the extract's permeability, smoke volume, and overall satisfaction. Adsorption and decolorization treatment not only enhances the product's appearance but also removes components that cause oral residue and off-flavors, while also enriching the aroma components to a certain extent, thus improving the fragrance's character.

[0093] In the specific embodiments of this application, Yunnan tobacco is used as the tobacco raw material. The aroma components with higher content in Yunnan tobacco are hyoscyamine and 9-hydroxy-4,7-mega-stigmadien-3-one. Hyoscyamine imparts a hay-like aroma to tobacco, while 9-hydroxy-4,7-mega-stigmadien-3-one has a sweet tobacco aroma. Solanone and neophytadiene are the main aroma components. The aerosol matrix obtained from the product in the examples has a predominantly sweet aroma, which is consistent with the aroma components of Yunnan tobacco. In addition, 2-hydroxy-3-methyl-2-cyclopentenone imparts maple, smoke, hard candy, and apricot aromas, daumatone imparts rose aromas, and β-guaiacene imparts aged, spicy, woody, medicinal, and smoky aromas. Solanone makes the smoke full-bodied and mellow, while mega-stigmadienone improves the aroma, making it soft and full-bodied, and masking off-flavors. In the examples, the content ratios of the various substances were well coordinated, while in the comparative examples, such as Comparative Examples 1, 3, and 5, the content of solanone and mesostazine was significantly lower, and their aroma scores were below 6 points.

[0094] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A tobacco treatment method for separating top, body, and base notes, characterized by, Includes the following steps: S1: Add extraction solvent to tobacco raw material and extract at -18 to -5℃ to obtain crude tobacco extract; S2: Molecular distillation of crude tobacco extract at 90-120℃ to obtain top aroma and residue from primary molecular distillation; S3: Molecular distillation is performed on the residue of the first molecular distillation at 130-170℃ to obtain body fragrance and base fragrance; S4: The top note, middle note, and base note are respectively subjected to adsorption and decolorization treatment; In S1, the extraction solvent includes ethanol, petroleum ether, and ethyl acetate in a volume ratio of (1-7):(1-7):(1-2).

2. The tobacco treatment method of claim 1, wherein, The adsorption and decolorization process includes: using the top note, body note and base note as components to be treated, dissolving the components to be treated in an ethanol solution, adding a mixture of silica gel and alumina, and performing adsorption and decolorization under stirring to obtain refined top note, body note and base note products respectively. And / or, the adsorption and decolorization temperature is 50–70℃, and the time is 1.5–3h.

3. The tobacco treatment method of claim 2, wherein, In the silica gel and alumina mixture, the mass ratio of silica gel to alumina is 9:1 to 7:3; And / or, the mass ratio of the component to be treated to the ethanol solution is 1:1 to 1:5; And / or, the mass of the silica gel and alumina mixture is 0.8% to 2% of the component to be treated; And / or, after the adsorption and decolorization are completed, the step of separating the ethanol solution is also included; And / or, the mass concentration of the ethanol solution is 80wt% to 95wt%.

4. The tobacco treatment method according to any one of claims 1 to 3, characterized in that, In S1, the extraction time is 5 to 12 hours; And / or, in S1, the mass-to-volume ratio of tobacco raw material to extraction solvent is 1g:8-12mL.

5. The tobacco treatment method according to any one of claims 1 to 4, characterized in that, The extraction solvent is ethanol, petroleum ether, and ethyl acetate in a volume ratio of 3:3:1; And / or, in S1, the extraction method includes at least one of immersion extraction, stirring extraction, and percolation extraction; And / or, the size of the tobacco raw material is 20 to 30 mesh.

6. The tobacco treatment method according to any one of claims 1 to 5, characterized in that, In the S2, the feed rate of the molecular distillation is 300-500 mL / h, the vacuum degree is 1x10 -1 mbar-5x10 -1 mbar; And / or, in S2, propylene glycol and / or glycerol are used as carriers for molecular distillation, wherein the mass of the carrier is 30% to 100% of the crude tobacco extract.

7. The tobacco treatment method according to any one of claims 1 to 6, characterized in that, In the S3, the feed rate of the molecular distillation is 300-500 mL / h, the vacuum degree is 5x10 -2 mbar-1x10 - 1 mbar; And / or, in S3, propylene glycol and / or glycerol are used as carriers for molecular distillation, wherein the mass of the carrier is 30% to 100% of the residue from a single molecular distillation.

8. The tobacco treatment method according to any one of claims 1 to 7, characterized in that, In S2 and S3, the apparatus used for molecular distillation includes any one of a static molecular distillation apparatus, a falling film molecular distillation apparatus, a centrifugal molecular distillation apparatus, and a scraped film molecular distillation apparatus; optionally, when using a scraped film molecular distillation apparatus, the scraper rotation speed is 250 to 300 rpm.

9. An aerosol generating substrate, characterised in that, It includes top notes, middle notes, and base notes, wherein the mass ratio of top notes: middle notes: base notes is 1-10:1-10:1-8; Optionally, the top scent includes neophytadiene and 2-hydroxy-3-methyl-2-cyclopentenone; optionally, the body scent includes solanone, hyoscyamine, 9-hydroxy-4,7-mega-stigmadien-3-one, damascone, β-guaiacene, mega-stigmatrienone, and nicotine; optionally, the base scent includes cephalotrindiol.

10. An aerosol generating substrate according to claim 9, wherein, The following conditions must be met, and the content is based on the dry matter content in the aerosol-generating matrix: (1) The content of solanone is 6-120 mg / kg; (2) The content of neophytadiene is 75-1195 mg / kg; (3) The content of 9-hydroxy-4,7-metazodiene-3-one is 15-140 mg / kg; (4) The content of cipertrienol is 3935-66160 mg / kg; (5) The content of megastigmatrienone is 6-1042 mg / kg; (6) Nicotine content is 100-1670 mg / kg; (7) The content of hyoscyamine is 25-435 mg / kg; (8) The content of trabesone is 0.1-2 mg / kg; (9) The content of 2-hydroxy-3-methyl-2-cyclopentenone is 0.45~8mg / kg; (10) The β-guaiacol content is 9.5-150 mg / kg.

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