Flue-cured tobacco extract, method for preparing flue-cured tobacco extract, use of flue-cured tobacco extract, atomization liquid, and electronic atomization apparatus

Abstract

The present application provides a flue-cured tobacco extract, a method for preparing a flue-cured tobacco extract, a use of a flue-cured tobacco extract, an atomization liquid, and an electronic atomization apparatus. The mass proportion of neophytadiene in the flue-cured tobacco extract is greater than or equal to 0.1 wt%, the mass proportion of scopoletin is greater than or equal to 0.1 wt%, and the mass proportion of α-cyperone is greater than or equal to 0.01 wt%. The flue-cured tobacco extract has rich types of aroma components, prominent flue-cured aroma and sweetness characteristics, a rich aroma, low risk of carbon deposition, and is safe and environmentally friendly. Moreover, the yield of the flue-cured tobacco extract is high, and the yield of dry substances therein is as high as 40% or more.

Description

Flue-cured tobacco extracts, preparation methods, applications, atomizing liquids, and electronic atomization devices.

[0001] This application claims priority to Chinese Patent Application No. 202411907064.X, filed on December 23, 2024, entitled "Tobacco Extract, Preparation Method of Tobacco Extract, Application, Atomizing Liquid and Electronic Atomizing Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic cigarette technology, and in particular to flue-cured tobacco extract, preparation method of flue-cured tobacco extract, application, atomizing liquid and electronic atomizing device. Background Technology

[0003] Flue-cured tobacco is tobacco leaves that are artificially heated and cured in a curing barn. During the curing process, heat energy gradually removes moisture from the tobacco leaves, while a series of complex physiological and chemical changes occur, such as the decomposition of starch, the accumulation of sugars, and the transformation of components like proteins and nicotine, thus giving the tobacco leaves their unique qualities. Flue-cured tobacco has the strongest aroma and sweetness among all types of tobacco, and flue-cured tobacco extracts are an essential raw material for preparing tobacco-flavored e-liquids.

[0004] Currently, the main methods for preparing flue-cured tobacco extracts are reflux extraction and direct high-temperature pyrolysis of flue-cured tobacco. Reflux extraction yields extracts with a strong roasted aroma and sweetness, but also contains more highly polar impurities, which can easily lead to carbon buildup and charring when used in e-cigarettes. Direct high-temperature pyrolysis of flue-cured tobacco produces extracts with a strong roasted aroma and sweetness and a robust smoky flavor, but the high-temperature pyrolysis process generates harmful substances such as phenols and polycyclic aromatic hydrocarbons. Summary of the Invention

[0005] Based on this, this application provides a flue-cured tobacco extract with sufficient roasted aroma and sweetness, rich aroma, high yield, and safety and environmental protection, as well as a method for preparing the flue-cured tobacco extract, its application, atomizing liquid, and an electronic atomizing device.

[0006] The first aspect of this application provides a flue-cured tobacco extract, wherein the extract contains ≥0.1 wt% neophytadiene, ≥0.1 wt% scopolamine, and ≥0.01 wt% α-cyperone.

[0007] In some embodiments, the mass percentage of neophytadiene in the flue-cured tobacco extract is 0.1 wt% to 0.25 wt%; and / or

[0008] The mass percentage of hyoscyamine lactone in the flue-cured tobacco extract is 0.1 wt%-0.25 wt%; and / or

[0009] The mass percentage of α-cyperone in the flue-cured tobacco extract is 0.01wt%-0.03wt%.

[0010] The second aspect of this application provides a method for preparing a flue-cured tobacco extract, comprising the following steps:

[0011] Supercritical extraction was performed on flue-cured tobacco to prepare a supercritical extract.

[0012] The residue obtained from the supercritical extraction is subjected to percolation extraction to prepare a percolation extract;

[0013] The supercritical extract and the percolation extract are combined to obtain a mixture, which is then subjected to a first concentration treatment and an extraction treatment in sequence.

[0014] The upper liquid obtained from the extraction process is centrifuged, filtered, and then concentrated to prepare flue-cured tobacco extract;

[0015] The temperature of the supercritical extraction is 30℃-60℃, the temperature of the percolation extraction is 10℃-30℃, and the temperature of the supercritical extraction is higher than the temperature of the percolation extraction.

[0016] The flue-cured tobacco extract contains ≥0.1 wt% neophytadiene, ≥0.1 wt% scopolamine, and ≥0.01 wt% α-cyperone.

[0017] In some embodiments, the solvent used for percolation extraction includes an aqueous solution of ethanol with a volume percentage concentration of 70%-90%; and / or

[0018] The percolation extraction has a material-to-liquid ratio of 1:(5-20); and / or

[0019] The percolation extraction time is 6h-24h.

[0020] In some embodiments, the supercritical extraction pressure is 20 MPa-40 MPa; and / or

[0021] The supercritical extraction time is 4-6 hours; and / or

[0022] The supercritical extraction uses an entrainer consisting of an aqueous ethanol solution with a volume percentage concentration of 70%-90%.

[0023] In some embodiments, the temperature of the first concentration treatment is 60°C-80°C; and / or

[0024] The vacuum degree of the first concentration process is 60 mbar-200 mbar; and / or

[0025] The mixture is concentrated to a mass percentage concentration of 65wt%-85wt% through the first concentration process.

[0026] In some embodiments, the solvent used in the extraction process includes an aqueous ethanol solution with a volume percentage concentration of 90%-95%; and / or

[0027] The feed-to-liquid ratio for the extraction process is 1:(2-20); and / or

[0028] The extraction process is performed at a temperature of -20°C to -5°C; and / or

[0029] The extraction process takes 4-24 hours.

[0030] In some embodiments, the centrifugation treatment temperature is -5°C to 5°C; and / or

[0031] The centrifugation speed is 5000 rpm-10000 rpm; and / or

[0032] The centrifugation time is 5 min to 30 min.

[0033] In some embodiments, the filtration is performed using a 600-mesh filter cloth; and / or

[0034] Before performing the supercritical extraction on the flue-cured tobacco, the preparation method further includes: pulverizing the flue-cured tobacco and then sieving it.

[0035] In some embodiments, the sieving process uses a sieve with a mesh size of 10-40.

[0036] In some embodiments, the temperature of the second concentration process is 50°C-80°C; and / or

[0037] The vacuum level of the second concentration process is 4 mbar-200 mbar; and / or

[0038] The filtered liquid is concentrated to a mass percentage concentration of 50wt%-80wt% through the second concentration process.

[0039] The third aspect of this application provides the application of the flue-cured tobacco extract of the first aspect of this application or the flue-cured tobacco extract prepared by the preparation method of the second aspect of this application in the preparation of atomizing liquid.

[0040] The fourth aspect of this application provides an atomizing liquid comprising a flue-cured tobacco extract; the flue-cured tobacco extract is the flue-cured tobacco extract of the first aspect of this application or a flue-cured tobacco extract prepared using the preparation method of the second aspect of this application.

[0041] In some embodiments, the tobacco extract accounts for 1 wt% to 8 wt% of the mass of the atomizing liquid.

[0042] In some embodiments, the atomizing liquid further includes an atomizing agent.

[0043] In some embodiments, the atomizing agent comprises one or more of propylene glycol, glycerol, ethanol, and water; and / or,

[0044] The atomizing agent is a mixture of propylene glycol and glycerol, wherein the mass percentage of propylene glycol in the mixture is 30%-70%.

[0045] In some embodiments, the atomizing liquid further includes at least one of the following features (1)-(3):

[0046] (1) The atomizing liquid also includes nicotine;

[0047] (2) The atomizing liquid also includes organic acids;

[0048] (3) The atomizing liquid also includes fragrance.

[0049] In some embodiments, the nicotine in the atomizing liquid has a mass percentage greater than 0 and less than or equal to 3 wt%; and / or,

[0050] The organic acid in the atomizing liquid has a mass percentage greater than 0 and less than or equal to 3 wt%; and / or,

[0051] The organic acid includes one or more of acetic acid, lactic acid, benzoic acid, malic acid, tartaric acid, citric acid, and levulinic acid; and / or,

[0052] The flavoring has a mass percentage in the atomizing liquid that is greater than 0 and less than or equal to 3 wt%.

[0053] The fifth aspect of this application provides an electronic atomizing device, including the atomizing liquid of the fourth aspect of this application.

[0054] The flue-cured tobacco extract provided above contains ≥0.1wt% neophytadiene, ≥0.1wt% scopolamine, and ≥0.01wt% α-cyperone. It has a rich variety of aroma-producing components, obvious roasted aroma and sweetness characteristics, rich aroma, low carbon deposition risk, and is safe and environmentally friendly. At the same time, the yield of flue-cured tobacco extract is high, with a dry matter yield of over 40%.

[0055] The preparation method of the flue-cured tobacco extract described above uses relatively low temperatures for both supercritical extraction and percolation extraction, which avoids the generation of harmful substances such as phenol and polycyclic aromatic hydrocarbons from high-temperature decomposition, making it more environmentally friendly and safer. The temperature of supercritical extraction is higher than that of percolation extraction. Therefore, the relatively higher temperature of supercritical extraction allows for the extraction of more aroma components using carbon dioxide, while the relatively lower temperature of percolation extraction allows for the extraction of the remaining aroma components, while other non-aroma components are not extracted, resulting in high yield and low risk of carbon buildup. In this preparation method, supercritical extraction is first used to extract the flue-cured tobacco. The residue obtained after extraction is then extracted using percolation. The two extracts are combined and then concentrated, extracted, and centrifuged to obtain the flue-cured tobacco extract. The obtained flue-cured tobacco extract closely approximates all the aroma components of flue-cured tobacco, significantly improving the richness of the tobacco aroma and the characteristic aroma of flue-cured tobacco, while increasing the dry matter yield by 2 times and significantly reducing costs. Detailed Implementation

[0056] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to relevant embodiments. Preferred embodiments of the application are given below. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0058] As used herein, the terms "and / or," "or / and," and "and / or" encompass any one of two or more of the related listed items, as well as any and all combinations of the related listed items. These arbitrary and all combinations include any two related listed items, any more related listed items, or a combination of all related listed items. It should be noted that when at least three items are connected using at least two conjunctions selected from "and / or," "or / and," and "and / or," it should be understood that, in this application, the technical solution undoubtedly includes solutions connected by "logical AND," and also undoubtedly includes solutions connected by "logical OR."

[0059] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0060] In this application, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0061] This document only specifically discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, just as any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, each individually disclosed point or single value can itself serve as a lower or upper limit and be combined with any other point or single value or with other lower or upper limits to form an unspecified range.

[0062] Unless otherwise specified, the temperature parameters in this application may be either constant temperature processing or processing within a certain temperature range. The constant temperature processing allows temperature fluctuations within the precision range controlled by the instrument, such as ±5℃, ±4℃, ±3℃, ±2℃, or ±1℃.

[0063] In this document, the term "suitable" as used in phrases such as "suitable combination," "suitable method," and "any suitable method" refers to the ability to implement the technical solution of this application, solve the technical problem of this application, and achieve the expected technical effect of this application.

[0064] In this application, terms such as "further," "even further," and "particularly" are used to describe purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0065] In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "optional" entries in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, each "optional" entry shall be independent.

[0066] In the description of the application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0068] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, but sequentially is preferred.

[0069] Conventional methods for preparing flue-cured tobacco extracts mainly include reflux extraction and direct high-temperature pyrolysis of flue-cured tobacco. The extract obtained by reflux extraction has a stronger roasted aroma and sweetness, but it also contains more highly polar impurities, which can easily lead to carbon buildup and charring when used in e-cigarettes. The extract obtained by direct high-temperature pyrolysis of flue-cured tobacco has a stronger roasted aroma and sweetness and a more pronounced smoky flavor, but the high-temperature pyrolysis process produces harmful substances such as phenols and polycyclic aromatic hydrocarbons.

[0070] Based on the above problems, this application uses supercritical extraction and percolation extraction processes to extract flue-cured tobacco twice. The resulting flue-cured tobacco extract has the characteristics of both supercritical and percolation extracts, and is close to all aroma components of flue-cured tobacco. The richness of tobacco aroma and the characteristic aroma of flue-cured tobacco are significantly improved, and the dry matter yield is increased by 2 times, while the cost is significantly reduced.

[0071] One or more embodiments of this application provide a flue-cured tobacco extract, wherein the flue-cured tobacco extract contains ≥0.1 wt% neophytadiene, ≥0.1 wt% scopolamine, and ≥0.01 wt% α-cyperone.

[0072] Understandably, the flue-cured tobacco extract provided above contains ≥0.1wt% neophytadiene, ≥0.1wt% scopolamine, and ≥0.01wt% α-cyperone. It is rich in aroma components, has obvious roasted aroma and sweetness characteristics, rich aroma, low carbon deposition risk, and is safe and environmentally friendly. At the same time, the yield of flue-cured tobacco extract is high, with an internal dry matter yield of over 40%.

[0073] In some embodiments, the mass percentage of neophytadiene in the flue-cured tobacco extract is 0.1 wt% to 0.25 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, 0.16 wt%, 0.17 wt%, 0.18 wt%, 0.19 wt%, 0.2 wt%, 0.21 wt%, 0.22 wt%, 0.23 wt%, 0.24 wt%, 0.25 wt%, or any range between two of the above mass percentages. When the mass percentage of neophytadiene in the flue-cured tobacco extract is within the above range, the tobacco aroma is more prominent, and the fragrance is more pronounced and pervasive.

[0074] As one possible implementation, the mass percentage of hyoscyamine butylbromide in the flue-cured tobacco extract is 0.1 wt% to 0.25 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, 0.16 wt%, 0.17 wt%, 0.18 wt%, 0.19 wt%, 0.2 wt%, 0.21 wt%, 0.22 wt%, 0.23 wt%, 0.24 wt%, 0.25 wt%, or any range between two of the above mass percentages. When the mass percentage of hyoscyamine butylbromide in the flue-cured tobacco extract is within the above range, user satisfaction is better.

[0075] In some embodiments, the mass percentage of α-cyperone in the flue-cured tobacco extract is 0.01 wt% to 0.03 wt%; for example, it can be, but is not limited to, 0.01 wt%, 0.015 wt%, 0.02 wt%, 0.025 wt%, 0.03 wt%, or any range between two of the above mass percentages. When the mass percentage of α-cyperone in the flue-cured tobacco extract is within the above range, the flue-cured aroma is more intense.

[0076] One or more embodiments of this application provide a method for preparing flue-cured tobacco extract, which can be used to prepare flue-cured tobacco extract. The preparation method includes the following steps:

[0077] Supercritical extraction was performed on flue-cured tobacco to prepare a supercritical extract; the residue obtained from the supercritical extraction was percolated to prepare a percolated extract; the supercritical extract and the percolated extract were combined to obtain a mixture, which was then subjected to a first concentration treatment and an extraction treatment in sequence; the supernatant obtained from the extraction treatment was centrifuged, filtered, and then concentrated to prepare a flue-cured tobacco extract.

[0078] The supercritical extraction temperature was 30℃-60℃, and the percolation extraction temperature was 10℃-30℃, with the supercritical extraction temperature being higher than the percolation extraction temperature; the mass percentage of neophytadiene in the flue-cured tobacco extract was ≥0.1wt%, the mass percentage of scopolamine was ≥0.1wt%, and the mass percentage of α-cyperone was ≥0.01wt%.

[0079] As a non-limiting example, the supercritical extraction temperature can be, but is not limited to, 30°C, 32°C, 34°C, 36°C, 38°C, 40°C, 42°C, 44°C, 46°C, 48°C, 50°C, 52°C, 54°C, 56°C, 58°C, 60°C, or any range between two of the above temperatures.

[0080] It should be noted that the "temperature of supercritical extraction" mentioned in the context refers to the extraction temperature during supercritical extraction.

[0081] The temperature for percolation extraction can be, but is not limited to, 10℃, 12℃, 14℃, 16℃, 18℃, 20℃, 22℃, 24℃, 26℃, 28℃, 30℃, or any two of the above temperatures.

[0082] Understandably, the preparation method of the flue-cured tobacco extract provided above uses relatively low temperatures for both supercritical extraction and percolation extraction, which avoids the generation of harmful substances such as phenol and polycyclic aromatic hydrocarbons through high-temperature decomposition, making it more environmentally friendly and safer. The temperature of supercritical extraction is higher than that of percolation extraction. Therefore, the relatively higher temperature of supercritical extraction allows for the extraction of more aroma components using carbon dioxide, while the relatively lower temperature of percolation extraction allows for the extraction of the remaining aroma components, while other non-aroma components are not extracted, resulting in high yield and low risk of carbon buildup. In this preparation method, supercritical extraction is first used to extract the flue-cured tobacco once. The residue obtained after extraction is then extracted using percolation. The two extracts are combined and then concentrated, extracted, and centrifuged to obtain the flue-cured tobacco extract. The obtained flue-cured tobacco extract closely approximates all the aroma components of flue-cured tobacco, significantly improving the richness of the tobacco aroma and the characteristic aroma of flue-cured tobacco, and increasing the dry matter yield by 2 times while significantly reducing costs.

[0083] It should be noted that the "dry matter" mentioned in the context refers to the substance remaining after the solvent is removed from the flue-cured tobacco extract.

[0084] In some embodiments, prior to the supercritical extraction step of flue-cured tobacco, the preparation method further includes: pulverizing the flue-cured tobacco and then sieving it.

[0085] In some optional embodiments, the sieve used for sieving has a mesh size of 10-40; for example, it can be, but is not limited to, 10 mesh, 20 mesh, 30 mesh, 40 mesh or any range between the above two mesh sizes.

[0086] In some embodiments, the mass percentage of neophytadiene in the flue-cured tobacco extract is 0.1 wt% to 0.25 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, 0.16 wt%, 0.17 wt%, 0.18 wt%, 0.19 wt%, 0.2 wt%, 0.21 wt%, 0.22 wt%, 0.23 wt%, 0.24 wt%, 0.25 wt%, or any range between any two of the above mass percentages.

[0087] As one possible implementation, the mass percentage of hyoscyamine lactone in the flue-cured tobacco extract is 0.1wt%-0.25wt%; for example, it can be, but is not limited to, 0.1wt%, 0.11wt%, 0.12wt%, 0.13wt%, 0.14wt%, 0.15wt%, 0.16wt%, 0.17wt%, 0.18wt%, 0.19wt%, 0.2wt%, 0.21wt%, 0.22wt%, 0.23wt%, 0.24wt%, 0.25wt%, or any range between two of the above mass percentages.

[0088] In some embodiments, the mass percentage of α-cyperone in the flue-cured tobacco extract is 0.01wt%-0.03wt%; for example, it can be, but is not limited to, 0.01wt%, 0.015wt%, 0.02wt%, 0.025wt%, 0.03wt%, or any range between the above two mass percentages.

[0089] In some embodiments, the solvent used for percolation extraction includes an aqueous ethanol solution with a volume percentage concentration of 70%-90%; for example, the volume percentage concentration of the aqueous ethanol solution can be, but is not limited to, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, 90%, or any range between two of the above volume percentage concentrations. Consequently, the extraction rate of water-soluble components such as polysaccharides and proteins is even lower.

[0090] As one possible implementation method, the material-to-liquid ratio for percolation extraction is 1:(5-20); for example, it can be, but is not limited to, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, or any range between two of the above material-to-liquid ratios. When the material-to-liquid ratio for percolation extraction is within the above range, the extraction rate is higher.

[0091] It should be noted that the "solid-to-liquid ratio for percolation extraction" mentioned in the context refers to the mass ratio of the residue obtained from supercritical extraction to the solvent used in percolation extraction.

[0092] In some embodiments, the percolation extraction time is 6h-24h; for example, it can be, but is not limited to, 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, 24h, or any range between two of the above times. When the percolation extraction time is within the above range, the extraction rate is higher.

[0093] It should be noted that the temperature, time, and solid-liquid ratio of percolation extraction can be combined in any suitable way, and the three can be selected from any of the percolation extraction temperatures, times, and solid-liquid ratios described in this article.

[0094] As one possible implementation method, the supercritical extraction pressure is 20 MPa-40 MPa; for example, it can be, but is not limited to, 20 MPa, 22 MPa, 24 MPa, 26 MPa, 28 MPa, 30 MPa, 32 MPa, 34 MPa, 36 MPa, 38 MPa, 40 MPa, or any range between two of the above pressures. When the supercritical extraction pressure is within the above range, the carbon dioxide is in a supercritical state, resulting in a higher extraction efficiency.

[0095] It should be noted that the "pressure of supercritical extraction" mentioned in the context refers to the extraction pressure during supercritical extraction.

[0096] In some implementations, the supercritical extraction time is 4-6 hours; for example, it can be, but is not limited to, 4 hours, 4.5 hours, 5 hours, 5.5 hours, 6 hours, or any range between two of the above times. When the supercritical extraction time is within the above range, the extraction is more complete.

[0097] In some alternative embodiments, the entrainer used in supercritical extraction comprises an aqueous ethanol solution with a volume percentage concentration of 70%-90%. For example, the volume percentage concentration of the aqueous ethanol solution can be, but is not limited to, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, 90%, or any range between two of the above volume percentage concentrations. Thus, most of the aroma components of tobacco can be extracted.

[0098] It should be noted that the temperature, time, and pressure of supercritical extraction can be combined in any suitable way, and the three can be selected from any supercritical extraction temperature, time, and pressure described in this article.

[0099] In some embodiments, the temperature of the first concentration process is 60°C-80°C; for example, it can be, but is not limited to, 60°C, 62°C, 64°C, 66°C, 68°C, 70°C, 72°C, 74°C, 76°C, 78°C, 80°C, or any range between two of the above temperatures.

[0100] It should be noted that in this article, terms such as "first concentration process" and "second concentration process" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first" and "second" serve only as a non-exhaustive enumeration and should be understood as not constituting a closed limitation on quantity.

[0101] In some optional embodiments, the vacuum degree of the first concentration process is 60 mbar to 200 mbar; for example, it can be, but is not limited to, 60 mbar, 70 mbar, 80 mbar, 90 mbar, 100 mbar, 110 mbar, 120 mbar, 130 mbar, 140 mbar, 150 mbar, 160 mbar, 170 mbar, 180 mbar, 190 mbar, 200 mbar, or any range between two of the above vacuum degrees.

[0102] It should be noted that the temperature and vacuum level of the first concentration process can be combined in any suitable way, and both can be selected from any of the first concentration process temperatures and vacuum levels described in this article.

[0103] When the temperature and vacuum level of the first concentration process are within the above range, the concentration efficiency is high and boiling-off is prevented.

[0104] As one possible implementation, the mixture is concentrated to a mass percentage concentration of 65wt%-85wt% through a first concentration process; for example, but not limited to, 65wt%, 66wt%, 67wt%, 68wt%, 69wt%, 70wt%, 71wt%, 72wt%, 73wt%, 74wt%, 75wt%, 76wt%, 77wt%, 78wt%, 79wt%, 80wt%, 81wt%, 82wt%, 83wt%, 84wt%, 85wt%, or any range between two of the above mass percentage concentrations. When the mixture is concentrated to a mass percentage concentration within the above range, the volume space is suitable, which is beneficial for the next step.

[0105] In some embodiments, the solvent used for the extraction process includes an aqueous ethanol solution with a volume percentage concentration of 90%-95%. The volume percentage concentration of the aqueous ethanol solution used for the extraction process can be, but is not limited to, 90%, 91%, 92%, 93%, 94%, 95%, or any range between two of the above volume percentage concentrations.

[0106] As one possible implementation, the material-to-liquid ratio for extraction is 1:(2-20); for example, it can be, but is not limited to, 1:2, 1:4, 1:6, 1:8, 1:10, 1:12, 1:14, 1:16, 1:18, 1:20, or any range between any two of the above material-to-liquid ratios.

[0107] It should be noted that the "solid-to-material ratio for extraction" mentioned in the context refers to the mass ratio of the mixture after the first concentration treatment to the solvent used in the extraction treatment.

[0108] In some embodiments, the extraction temperature is -20°C to -5°C; for example, it can be, but is not limited to, -20°C, -19°C, -18°C, -17°C, -16°C, -15°C, -14°C, -13°C, -12°C, -11°C, -10°C, -9°C, -8°C, -7°C, -6°C, -5°C, or any range between two of the above temperatures. When the extraction temperature is within the above range, the extraction and impurity removal effect is better.

[0109] In some optional embodiments, the extraction process takes 4-24 hours. For example, it can be, but is not limited to, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 14 hours, 16 hours, 18 hours, 20 hours, 22 hours, 24 hours, or any range between two of the above times.

[0110] In some alternative implementations, the extraction process takes 5-12 hours.

[0111] It should be noted that the extraction temperature, time, and liquid-to-material ratio can be combined in any suitable way, and the three can be selected from any extraction temperature, time, and liquid-to-material ratio described in this article.

[0112] In some embodiments, the centrifugation temperature is -5℃ to 5℃; for example, it can be, but is not limited to, -5℃, -4℃, -3℃, -2℃, -1℃, 0℃, 1℃, 2℃, 3℃, 4℃, 5℃, or any range between two of the above temperatures.

[0113] As one possible implementation, the centrifugation speed is 5000 rpm to 10000 rpm. For example, it can be, but is not limited to, 5000 rpm, 5500 rpm, 6000 rpm, 6500 rpm, 7000 rpm, 7500 rpm, 8000 rpm, 8500 rpm, 9000 rpm, 9500 rpm, 10000 rpm, or any range between two of the above speeds.

[0114] In some optional embodiments, the centrifugation time is 5 min to 30 min. For example, it can be, but is not limited to, 5 min, 10 min, 15 min, 20 min, 25 min, 30 min, or any range between two of the above times.

[0115] As one possible implementation method, the centrifugation time is 10 min to 30 min.

[0116] It should be noted that the temperature, time, and speed of centrifugation can be combined in any suitable way, and the three can be selected from any centrifugation temperature, time, and speed described in this article.

[0117] In some implementations, 600-mesh filter cloth is used for filtration.

[0118] In some alternative implementations, the filter cloth is made of nylon mesh.

[0119] As one possible implementation, the temperature of the second concentration process is 50°C-80°C; for example, it can be, but is not limited to, 50°C, 52°C, 54°C, 56°C, 58°C, 60°C, 62°C, 64°C, 66°C, 68°C, 70°C, 72°C, 74°C, 76°C, 78°C, 80°C, or any range between two of the above temperatures.

[0120] In some exemplary embodiments, the vacuum degree of the second concentration process is 4 mbar to 200 mbar; for example, it can be, but is not limited to, 4 mbar, 10 mbar, 20 mbar, 30 mbar, 40 mbar, 50 mbar, 60 mbar, 70 mbar, 80 mbar, 90 mbar, 100 mbar, 110 mbar, 120 mbar, 130 mbar, 140 mbar, 150 mbar, 160 mbar, 170 mbar, 180 mbar, 190 mbar, 200 mbar, or any range between two of the above vacuum degrees.

[0121] It should be noted that the temperature and vacuum level of the second concentration process can be combined in any suitable manner, and both can be selected from any of the temperatures and vacuum levels of the first concentration process described in this article.

[0122] When the temperature and vacuum level of the second concentration process are within the above ranges, the concentration efficiency is higher, and boiling over is prevented.

[0123] In one possible implementation, the filtered liquid is concentrated to a mass percentage concentration of 50wt%-80wt% through a second concentration process. For example, it can be, but is not limited to, 50wt%, 52wt%, 54wt%, 56wt%, 58wt%, 60wt%, 62wt%, 64wt%, 66wt%, 68wt%, 70wt%, 72wt%, 74wt%, 76wt%, 78wt%, 80wt%, or any range between two of the above values. This results in a small volume of filtered liquid, which is beneficial for subsequent operations and storage.

[0124] One or more embodiments of this application provide the application of the flue-cured tobacco extract described above or the flue-cured tobacco extract prepared by the above preparation method in the preparation of atomizing liquid.

[0125] One or more embodiments of this application provide an atomizing liquid, which includes a flue-cured tobacco extract; the flue-cured tobacco extract is the flue-cured tobacco extract described above or a flue-cured tobacco extract prepared by the preparation method described above.

[0126] In some embodiments, the mass percentage of the flue-cured tobacco extract in the atomizing liquid is 1 wt% to 8 wt%; for example, it can be, but is not limited to, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, or any range between two of the above mass percentages. When the mass percentage of the flue-cured tobacco extract in the atomizing liquid is within the above range, the taste and atomization performance are better.

[0127] In some embodiments, the atomizing fluid also includes an atomizing agent.

[0128] In some alternative implementations, the atomizing agent includes one or more of propylene glycol, glycerol, ethanol, and water.

[0129] As one possible implementation, the atomizing agent is a mixture of propylene glycol and glycerol, with propylene glycol accounting for 30%-70% of the mixture by mass; for example, it can be, but is not limited to, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, or any range between any two of the above mass percentages.

[0130] In some implementations, the atomizing fluid also includes nicotine.

[0131] In some embodiments, the mass percentage of nicotine in the atomizing liquid is greater than 0 and less than or equal to 3 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.2 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, 1 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%, 2 wt%, 2.2 wt%, 2.4 wt%, 2.6 wt%, 2.8 wt%, 3 wt%, or any range between any two of the above mass percentages.

[0132] As one possible implementation, the atomizing fluid also includes organic acids.

[0133] In some exemplary embodiments, the organic acid in the atomizing liquid has a mass percentage greater than 0 and less than or equal to 3 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.2 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, 1 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%, 2 wt%, 2.2 wt%, 2.4 wt%, 2.6 wt%, 2.8 wt%, 3 wt%, or any range between any two of the above mass percentages.

[0134] In some of these embodiments, the organic acid includes one or more of acetic acid, lactic acid, benzoic acid, malic acid, tartaric acid, citric acid, and levulinic acid.

[0135] In some embodiments, the atomizing liquid also includes a fragrance.

[0136] In some optional embodiments, the flavoring has a mass percentage in the atomizing liquid that is greater than 0 and less than or equal to 3 wt%; for example, it can be, but is not limited to, 0.1 wt%, 0.2 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, 1 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%, 2 wt%, 2.2 wt%, 2.4 wt%, 2.6 wt%, 2.8 wt%, 3 wt%, or any range between any two of the above mass percentages.

[0137] One or more embodiments of this application provide an electronic atomizing device, including the atomizing liquid described above.

[0138] As a non-limiting example, an electronic atomizing device includes an atomizer and a battery assembly. The atomizer can employ various atomization methods, such as resistive atomization, ultrasonic atomization, and electromagnetic atomization.

[0139] The technical solutions of this application will be described in detail below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating this application and are not intended to limit the scope of this application. For experimental methods in the following embodiments where specific conditions are not specified, please refer to the guidelines given in this application first, or follow experimental manuals or conventional conditions in the field, or follow the conditions recommended by the manufacturer, or refer to experimental methods known in the field.

[0140] In the specific embodiments described below, the measurement parameters involving raw material components may have slight deviations within the weighing accuracy range unless otherwise specified. Temperature and time parameters are subject to acceptable deviations due to instrument testing accuracy or operational precision.

[0141] I. Preparation of Flue-cured Tobacco Extract

[0142] Example 1

[0143] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 60℃, extraction pressure of 20MPa, separation temperature of 40℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0144] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using an ethanol aqueous solution with a volume percentage concentration of 70%. The extraction parameters included: a material-to-liquid ratio of 1:5, a temperature of 30°C, and a time of 6 hours. The percolation extract was then collected.

[0145] Step S3: Combine the supercritical extract and the percolation extract to obtain a mixture. Perform a first concentration treatment on the mixture at 60℃ and 100mbar vacuum until the mass percentage concentration of the mixture is 65wt%. Then, add 20 times the mass of the concentrated mixture and ultrasonically disperse it evenly in a 90% ethanol aqueous solution. After extraction at -18℃ for 12h, take the upper layer liquid and centrifuge at -4℃ and 8000rpm. After centrifugation, take the supernatant and filter it through a 600-mesh nylon screen. Perform a second concentration treatment on the filtrate at 60℃ and 100mbar vacuum until the liquid mass percentage concentration is 80wt% to obtain the flue-cured tobacco extract.

[0146] Example 2

[0147] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 30℃, extraction pressure of 40MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer is 90% ethanol aqueous solution with a volume percentage concentration, and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0148] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using a 90% (v / v) ethanol aqueous solution. The extraction parameters included: a material-to-liquid ratio of 1:20, a temperature of 10°C, and a time of 24 h. The percolation extract was then collected.

[0149] Step S3: Combine the supercritical extract and the percolation extract to obtain a mixture. Perform a first concentration treatment on the mixture at 60℃ and 100mbar vacuum until the mass percentage concentration of the mixture is 65wt%. Then, add twice the mass of the concentrated mixture and ultrasonically disperse it evenly in a 90% ethanol aqueous solution. After extraction at -18℃ for 12h, take the upper liquid and centrifuge at -4℃ and 8000rpm. After centrifugation, take the supernatant and filter it through a 600-mesh nylon screen. Perform a second concentration treatment on the filtrate at 60℃ and 100mbar vacuum until the liquid mass percentage concentration is 80wt% to obtain the flue-cured tobacco extract.

[0150] Example 3

[0151] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 45℃, extraction pressure of 30MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0152] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using an 80% (v / v) ethanol aqueous solution. The extraction parameters included: a material-to-liquid ratio of 1:10, a temperature of 20°C, and a time of 12 h. The percolation extract was then collected.

[0153] Step S3: Combine the supercritical extract and the percolation extract to obtain a mixture. Perform a first concentration treatment on the mixture at 60℃ and 100mbar vacuum until the mass percentage concentration of the mixture is 65wt%. Then, add 10 times the mass of the concentrated mixture and ultrasonically disperse it evenly. After extraction at -18℃ for 12h, take the upper liquid and centrifuge at -4℃ and 8000rpm. After centrifugation, take the supernatant and filter it through a 600-mesh nylon screen. Perform a second concentration treatment on the filtrate at 60℃ and 100mbar vacuum until the liquid mass percentage concentration is 80wt% to obtain the flue-cured tobacco extract.

[0154] Comparative Example 1

[0155] The difference between Comparative Example 1 and Example 3 is that in Comparative Example 1, the flue-cured tobacco residue after supercritical extraction was not subjected to percolation extraction; all other aspects were the same. Comparative Example 1 is detailed below:

[0156] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 45℃, extraction pressure of 30MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0157] Step S2: The supercritical extract is concentrated at 60℃ and 100mbar vacuum until the mass percentage concentration of the mixture is 65wt%. Then, 10 times the mass of the concentrated mixture is added to an ethanol aqueous solution with a volume percentage concentration of 90% and ultrasonically dispersed. After extraction at -18℃ for 12h, the upper liquid is centrifuged at -4℃ and 8000rpm. After centrifugation, the supernatant is filtered through a 600-mesh nylon screen. The filtrate is concentrated at 60℃ and 100mbar vacuum until the liquid mass percentage concentration is 80wt% to obtain the flue-cured tobacco extract.

[0158] Comparative Example 2

[0159] The difference between Comparative Example 2 and Example 3 is that in Comparative Example 2, supercritical extraction was not performed on the flue-cured tobacco; instead, percolation extraction was used directly. All other aspects are the same. Comparative Example 2 is detailed below:

[0160] Step S1: Crush the flue-cured tobacco to 20 mesh, and perform percolation extraction on the crushed flue-cured tobacco using an 80% (v / v) ethanol aqueous solution. The extraction parameters include: a material-to-liquid ratio of 1:10, a temperature of 20°C, and a time of 12 hours. Collect the percolation extract.

[0161] Step S2: After combining the percolation extracts, a mixture is obtained. The mixture is then concentrated at 60°C and 100 mbar vacuum until the mass percentage concentration of the mixture is 65 wt%. Then, 10 times the mass of the concentrated mixture is added to a 90% ethanol aqueous solution and ultrasonically dispersed. After extraction at -18°C for 12 h, the supernatant is centrifuged at -4°C and 8000 rpm. After centrifugation, the supernatant is filtered through a 600-mesh nylon screen. The filtrate is then concentrated at 60°C and 100 mbar vacuum until the liquid mass percentage concentration is 80 wt%, yielding the flue-cured tobacco extract.

[0162] Comparative Example 3

[0163] The difference between Comparative Example 3 and Example 3 is that the extraction temperature during supercritical extraction in Comparative Example 3 was 15°C, which is lower than the temperature during percolation extraction. The preparation method of Comparative Example 3 is as follows:

[0164] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 15℃, extraction pressure of 30MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0165] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using an 80% (v / v) ethanol aqueous solution. The extraction parameters included: a material-to-liquid ratio of 1:10, a temperature of 20°C, and a time of 12 h. The percolation extract was then collected.

[0166] Step S3: Combine the supercritical extract and the percolation extract to obtain a mixture. Perform a first concentration treatment on the mixture at 60℃ and 100mbar vacuum until the mass percentage concentration of the mixture is 65wt%. Then, add 10 times the mass of the concentrated mixture and ultrasonically disperse it evenly. After extraction at -18℃ for 12h, take the upper liquid and centrifuge at -4℃ and 8000rpm. After centrifugation, take the supernatant and filter it through a 600-mesh nylon screen. Perform a second concentration treatment on the filtrate at 60℃ and 100mbar vacuum until the liquid mass percentage concentration is 80wt% to obtain the flue-cured tobacco extract.

[0167] Comparative Example 4

[0168] The preparation method of Comparative Example 4 is similar to that of Example 3, except that the extraction temperature during supercritical extraction in step S1 of Comparative Example 4 is 70°C, and the extraction temperature during percolation extraction in step S2 is 40°C. All other conditions are the same. The specific method of Comparative Example 4 is as follows:

[0169] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 70℃, extraction pressure of 30MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0170] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using an 80% (v / v) ethanol aqueous solution. The extraction parameters included: a material-to-liquid ratio of 1:10, a temperature of 40°C, and a time of 12 h. The percolation extract was then collected.

[0171] Step S3 is the same as step S3 in Example 3.

[0172] Comparative Example 5

[0173] The preparation method of Comparative Example 5 is similar to that of Example 3, except that the extraction temperature during supercritical extraction in step S1 of Comparative Example 5 is 20°C, and the extraction temperature during percolation extraction in step S2 is 5°C. All other conditions are the same. The specific method of Comparative Example 5 is as follows:

[0174] Step S1: Crush the flue-cured tobacco to 20 mesh, and use carbon dioxide to perform supercritical extraction on the crushed flue-cured tobacco. The extraction parameters include: extraction temperature of 20℃, extraction pressure of 30MPa, separation temperature of 30℃, separation pressure of 10MPa, entrainer of 90% ethanol aqueous solution (volume percentage concentration), and extraction time of 4h; collect the carbon dioxide extract to obtain the supercritical extract.

[0175] Step S2: Percolation extraction was performed on the flue-cured tobacco residue obtained after supercritical extraction using an 80% (v / v) ethanol aqueous solution. The extraction parameters included: a material-to-liquid ratio of 1:10, a temperature of 20°C, and a time of 12 h. The percolation extract was then collected.

[0176] Step S3 is the same as step S3 in Example 3.

[0177] II. Preparation of Atomizing Fluid

[0178] Application Example 1

[0179] Take 5 parts by weight of the flue-cured tobacco extract obtained in Example 1, 47.5 parts by weight of propylene glycol and 47.5 parts by weight of glycerol, and prepare an atomizing liquid.

[0180] Application Example 2

[0181] Take 5 parts by weight of the flue-cured tobacco extract obtained in Example 2, 47.5 parts by weight of propylene glycol and 47.5 parts by weight of glycerol, and prepare an atomizing liquid.

[0182] Application Example 3

[0183] Take 5 parts by weight of the flue-cured tobacco extract obtained in Example 3, 47.5 parts by weight of propylene glycol and 47.5 parts by weight of glycerol, and prepare an atomizing liquid.

[0184] Application Example 4

[0185] Take 1 part by weight of the flue-cured tobacco extract obtained in Example 3, 3 parts by weight of nicotine, 3 parts by weight of lactic acid, 3 parts by weight of flue-cured tobacco flavoring, 45 parts by weight of propylene glycol and 45 parts by weight of glycerol, and prepare an atomizing liquid.

[0186] Application Example 5

[0187] Take 8 parts by weight of the flue-cured tobacco extract obtained in Example 3, 1 part by weight of nicotine, 1 part by weight of lactic acid, 45 parts by weight of propylene glycol and 45 parts by weight of glycerol, and prepare an atomizing liquid.

[0188] Application Comparative Example 1

[0189] Take 5 parts by mass of the flue-cured tobacco extract obtained in Comparative Example 1, 47.5 parts by mass of propylene glycol and 47.5 parts by mass of glycerol, and prepare an atomizing liquid.

[0190] Application Comparative Example 2

[0191] Take 5 parts by mass of the flue-cured tobacco extract obtained in Comparative Example 2, 47.5 parts by mass of propylene glycol and 47.5 parts by mass of glycerol, and prepare an atomizing liquid.

[0192] Application Comparative Example 3

[0193] Take 5 parts by mass of the flue-cured tobacco extract obtained in Comparative Example 3, 47.5 parts by mass of propylene glycol and 47.5 parts by mass of glycerol, and prepare an atomizing liquid.

[0194] Application Comparative Example 4

[0195] Take 5 parts by mass of the flue-cured tobacco extract obtained in Comparative Example 4, 47.5 parts by mass of propylene glycol and 47.5 parts by mass of glycerol, and prepare an atomizing liquid.

[0196] Application Comparative Example 5

[0197] Take 5 parts by mass of the flue-cured tobacco extract obtained in Comparative Example 5, 47.5 parts by mass of propylene glycol and 47.5 parts by mass of glycerol, and prepare an atomizing liquid.

[0198] III. Flavor Component Determination and Sensory Evaluation

[0199] 1. Determination of flavor components in flue-cured tobacco extracts

[0200] The sample pretreatment method is as follows: Take 1 mL of flue-cured tobacco composition or nicotine composition and extract with dichloromethane at a volume ratio of 10:1. After concentrating the extract to recover dichloromethane, add 1 mL of anhydrous ethanol to dissolve it, filter it through a 0.45 μm filter membrane and set it aside for use.

[0201] Detection method: The detection equipment was GC-MS (6590-7890). The injection port temperature was 250℃, the initial temperature was 40℃, and it was held for 2 min; the temperature was increased to 150℃ at 3℃ / min and held for 5 min; the temperature was increased to 300℃ at 5℃ / min and held for 5 min; finally, the temperature was increased to 320℃ at 10℃ / min and held for 10 min. The relative content and relative content ratio were calculated by peak area integral. The test results of Examples 1-3 and Comparative Examples 1-5 are shown in Table 1.

[0202] 2. Sensory Evaluation: Application Examples 1-5 and Comparative Examples 1-5 were placed in the same type of e-liquid cartridge (internal model T65B-1). (If it is flue-cured tobacco extract, the concentration of flue-cured tobacco extract is 5%, supplemented to 100% with propylene glycol and glycerol in a 5:5 volume ratio). 3-5 e-cigarette expert evaluators conducted a blind sensory evaluation using the same type of e-cigarette device (RELX 5th generation). The vaping operation standard followed general e-cigarette sensory evaluation standards (3 seconds of vaping per sample, with an evaluation interval of more than 10 minutes between samples). The scoring range was 1-10 points, using a positive scoring principle. The scoring dimensions focused on the characteristic aroma, richness, and overall sensory evaluation of flue-cured tobacco. Single sensory dimension scoring standard: 1-3 points for weak; 4-6 points for average; 7-10 points for strong. Overall sensory scoring standard: 1-3 points for poor overall taste; 4-6 points for average overall taste; 7 points and above for excellent overall taste. The average scores were statistically analyzed, and the specific results are shown in Table 2.

[0203] Table 1

[0204] Table 2

[0205] As can be seen from the results in Tables 1 and 2, when preparing the flue-cured tobacco extract in this application, the flue-cured tobacco was extracted twice using both supercritical extraction and percolation extraction processes. The resulting flue-cured tobacco extract possesses the characteristics of both supercritical and percolation extracts, closely approximating the full range of aroma components of flue-cured tobacco, and significantly enhancing both the richness of the tobacco aroma and the characteristic aroma of flue-cured tobacco.

[0206] 3. Dry matter yield of flue-cured tobacco extract

[0207] The dry matter yield test method is the gravimetric method: the weight of the extract is subtracted from the weight of the solvent (water and ethanol) to obtain the dry matter mass, and the yield is the dry matter mass divided by the weight of the tobacco leaves.

[0208] The dry matter yield of the flue-cured tobacco extracts in Examples 1-3 and Comparative Examples 1-5 is shown in Table 3.

[0209] Table 3

[0210] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0211] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flue-cured tobacco extract, wherein the extract contains ≥0.1 wt% neophytadiene, ≥0.1 wt% scopolamine, and ≥0.01 wt% α-cyperone.

2. The flue-cured tobacco extract as described in claim 1, wherein, The mass percentage of neophytadiene in the flue-cured tobacco extract is 0.1 wt%-0.25 wt%; and / or The mass percentage of hyoscyamine lactone in the flue-cured tobacco extract is 0.1 wt%-0.25 wt%; and / or The mass percentage of α-cyperone in the flue-cured tobacco extract is 0.01wt%-0.03wt%.

3. A method for preparing a flue-cured tobacco extract, comprising the following steps: Supercritical extraction was performed on flue-cured tobacco to prepare a supercritical extract. The residue obtained from the supercritical extraction is subjected to percolation extraction to prepare a percolation extract; The supercritical extract and the percolation extract are combined to obtain a mixture, which is then subjected to a first concentration treatment and an extraction treatment in sequence. The upper liquid obtained from the extraction process is centrifuged, filtered, and then concentrated to prepare flue-cured tobacco extract; in, The temperature of the supercritical extraction is 30℃-60℃, and the temperature of the percolation extraction is 10℃-30℃. The temperature of the supercritical extraction is higher than that of the percolation extraction. The flue-cured tobacco extract contains ≥0.1 wt% neophytadiene, ≥0.1 wt% scopolamine, and ≥0.01 wt% α-cyperone.

4. The preparation method according to claim 3, wherein, The solvent used in the percolation extraction includes an aqueous solution of ethanol with a volume percentage concentration of 70%-90%; and / or The percolation extraction has a material-to-liquid ratio of 1:(5-20); and / or The percolation extraction time is 6h-24h.

5. The preparation method according to any one of claims 3 to 4, wherein, The supercritical extraction pressure is 20 MPa-40 MPa; and / or The supercritical extraction time is 4-6 hours; and / or The supercritical extraction uses an entrainer consisting of an aqueous ethanol solution with a volume percentage concentration of 70%-90%.

6. The preparation method according to any one of claims 3 to 5, wherein, The temperature of the first concentration treatment is 60℃-80℃; and / or The vacuum degree of the first concentration process is 60 mbar-200 mbar; and / or The mixture is concentrated to a mass percentage concentration of 65wt%-85wt% through the first concentration process.

7. The preparation method according to any one of claims 3 to 6, wherein, The solvent used in the extraction process includes an aqueous solution of ethanol with a volume percentage concentration of 90%-95%; and / or The feed-to-liquid ratio for the extraction process is 1:(2-20); and / or The extraction process is performed at a temperature of -20°C to -5°C; and / or The extraction process takes 4-24 hours.

8. The preparation method according to any one of claims 3 to 7, wherein, The centrifugation process is performed at a temperature of -5℃ to 5℃; and / or The centrifugation speed is 5000 rpm-10000 rpm; and / or The centrifugation time is 5 min to 30 min.

9. The preparation method according to any one of claims 3 to 8, wherein, The filtration was performed using a 600-mesh filter cloth; and / or Before performing the supercritical extraction on the flue-cured tobacco, the preparation method further includes: pulverizing the flue-cured tobacco and then sieving it.

10. The preparation method according to claim 9, wherein, The sieving process uses a sieve with a mesh size of 10-40.

11. The preparation method according to any one of claims 3 to 10, wherein, The temperature of the second concentration process is 50℃-80℃; and / or The vacuum level of the second concentration process is 4 mbar-200 mbar; and / or The filtered liquid is concentrated to a mass percentage concentration of 50wt%-80wt% through the second concentration process.

12. The use of a flue-cured tobacco extract according to any one of claims 1 to 2 or a flue-cured tobacco extract prepared by any one of claims 3 to 11 in the preparation of an atomizing liquid.

13. An atomizing liquid, the atomizing liquid comprising flue-cured tobacco extract; wherein the flue-cured tobacco extract is the flue-cured tobacco extract according to any one of claims 1 to 2 or the flue-cured tobacco extract prepared by any one of claims 3 to 11.

14. The atomizing liquid as described in claim 13, wherein, The tobacco extract accounts for 1 wt% to 8 wt% of the mass of the atomizing liquid.

15. The atomizing liquid according to any one of claims 13 to 14, wherein, The atomizing liquid also includes an atomizing agent.

16. The atomizing liquid as described in claim 15, wherein, The atomizing agent includes one or more of propylene glycol, glycerol, ethanol, and water; and / or, The atomizing agent is a mixture of propylene glycol and glycerol, wherein the mass percentage of propylene glycol in the mixture is 30%-70%.

17. The atomizing liquid according to any one of claims 13 to 16, wherein, The atomizing liquid further includes at least one of the following features (1)-(3): (1) The atomizing liquid also includes nicotine; (2) The atomizing liquid also includes organic acids; (3) The atomizing liquid also includes fragrance.

18. The atomizing liquid as described in claim 17, wherein, The nicotine in the atomizing liquid has a mass percentage greater than 0 and less than or equal to 3 wt%; and / or, The organic acid in the atomizing liquid has a mass percentage greater than 0 and less than or equal to 3 wt%; and / or, The organic acid includes one or more of acetic acid, lactic acid, benzoic acid, malic acid, tartaric acid, citric acid, and levulinic acid; and / or, The flavoring has a mass percentage in the atomizing liquid that is greater than 0 and less than or equal to 3 wt%.

19. An electronic atomizing device, comprising the atomizing liquid as described in any one of claims 13 to 18.

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