Preparation method of additive liquid and tobacco filler for heated cigarette and granular heated cigarette

Abstract

The present invention relates to a method for preparing a feed liquid and tobacco filler for heating cigarettes and a granular heated cigarette. The above-mentioned preparation method comprises: mixing tobacco fragments with water, heating and refluxing, collecting tobacco essential oil and water extraction residue; adding ethanol solution to the water extraction residue, heating and refluxing, collecting the extract and alcohol extraction residue; freezing the extract and centrifuging to obtain a first extract; cooling and drying the alcohol extraction residue, performing supercritical extraction of carbon dioxide, collecting a second extract and supercritical residue; mixing tobacco essential oil, the first extract and the second extract to prepare a feed liquid for heating cigarettes; adding the feed liquid to the second tobacco, preparing tobacco particles, and obtaining a first tobacco filler; soaking the loaded residue material in essence and drying it to obtain a second tobacco filler. The method can reduce production costs while improving smoke quality; and the entire process is environmentally friendly, and no wastewater and waste residue are generated.

Description

Technical Field

[0001] The invention relates to the technical field of heated cigarettes, and in particular to a method for preparing a feed liquid and a tobacco filler for heated cigarettes and a granular heated cigarette. Background Art

[0002] Heated cigarettes deliver the aroma of tobacco to consumers by heating without burning. The tobacco heating temperature is relatively low, below 350°C, which avoids the formation of harmful compounds such as tar caused by high-temperature combustion of tobacco. In addition, since there is basically no sidestream smoke, no secondhand smoke is generated. Therefore, heated cigarettes have received more and more attention and favor from consumers in recent years.

[0003] In order to improve the smoking taste of heated cigarettes, there is a scheme in the related art to extract substances from tobacco and add them to heated cigarettes, such as extracting tobacco and concentrating it to prepare extract, and then adding the extract to tobacco to improve the original aroma of tobacco. Such operation is not only costly, but also has an insignificant aroma enhancement effect. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related art, the present invention provides a method for preparing a feed liquid and a tobacco filler for a heated cigarette and a granular heated cigarette.

[0005] The present invention provides a method for preparing a feed liquid and a tobacco filler for heating cigarettes, which comprises the following steps:

[0006] a), chopping the first tobacco into pieces to obtain tobacco fragments;

[0007] b), mixing the tobacco fragments with water, heating and refluxing, and collecting tobacco essential oil and water extraction residue;

[0008] c), adding ethanol solution to the water extraction residue, heating and refluxing, cooling and pressing to separate, collecting the extract and the ethanol extraction residue; freezing the extract and centrifuging to obtain a first extract;

[0009] d) cooling and drying the alcohol extraction residue, and then subjecting it to supercritical carbon dioxide extraction to collect the second extract and the supercritical residue;

[0010] e), mixing the tobacco essential oil, the first extract and the second extract to prepare a feed liquid for heating cigarettes;

[0011] f), adding the feed liquid to the second tobacco to prepare tobacco particles to obtain a first tobacco filler; the first tobacco filler is used to be arranged in the tobacco segment of the heated cigarette;

[0012] g), soaking the loaded residue material in essence and then drying it to obtain a second tobacco filler; the second tobacco filler is used to be arranged in the hollow section of the heated cigarette; the loaded residue material is the supercritical residue, and / or the loaded residue material is the residue particles obtained by granulating the supercritical residue after drying.

[0013] Furthermore, the tobacco fragments are square in shape with a side length of 1 to 2 cm.

[0014] Furthermore, in the step c), the freezing temperature is -15 to -25°C, and the freezing time is 24 to 48 hours.

[0015] Furthermore, the tobacco essential oil, the first extract and the second extract are mixed in a ratio of 1:(10-1000):(0.1-2).

[0016] Furthermore, in the step g), the residue particles are prepared specifically according to the following method: the supercritical residue is dried, ground, and dry-granulated at 80-100° C. for 12-24 hours to obtain residue particles.

[0017] Furthermore, in the step b), the mass ratio of water to tobacco fragments is (6-15):1, and the heating reflux time is 1-6 hours.

[0018] Furthermore, in step c), the ethanol solution is added to the water extraction residue for heating under reflux, specifically:

[0019] Add 95% ethanol solution to the water extraction residue, and heat under reflux at 85-95° C. for 0.5-4 h; the amount of ethanol solution added is 1-20 times the volume of water in step b).

[0020] Furthermore, in step d), the temperature of the carbon dioxide supercritical extraction is 40-50° C., the extraction pressure is 28-35 MPa, and the extraction time is 1-3 hours.

[0021] Furthermore, the first tobacco and the second tobacco are the same tobacco.

[0022] The present invention also provides a particle-type heated cigarette, wherein a first tobacco filler prepared by any one of the above methods is arranged in the tobacco segment; and a second tobacco filler prepared by any one of the above methods is arranged in the hollow segment.

[0023] The method for preparing the additive liquid and tobacco filler for heating cigarettes provided by the present invention may have the following beneficial effects:

[0024] 1) This application extracts the same batch of tobacco by steam distillation, ethanol extraction, and CO2 supercritical extraction in sequence, so that most of the flavor components in the tobacco can be extracted, ensuring the extraction efficiency and avoiding the waste of tobacco raw materials; then the extracted tobacco essential oil, the first extract, and the second extract are mixed to prepare the feed liquid, thereby improving the quality of the tobacco aroma. This improves the quality of the smoke and reduces the production cost at the same time;

[0025] 2) During the alcohol extraction process, the first extract collected is directly used without vacuum concentration, thereby avoiding the loss of low-boiling point aroma substances in the extract during the vacuum concentration process;

[0026] 3) The alcohol-extracted extract is frozen to separate out a series of smoke-unfriendly components such as proteins and high-carbon alkanes, and then these components are separated from the extract by centrifugation to improve the quality of smoke.

[0027] 4) The residue after steam distillation, alcohol extraction and supercritical carbon dioxide extraction is reused as a flavor loading material, and the second tobacco filler obtained after loading the flavor is added to the hollow section of the heated cigarette to achieve a sustained release effect. This method can achieve 100% utilization of tobacco raw materials, further reducing costs while improving the aroma.

[0028] 5) This method can be used to simultaneously prepare the feed liquid and tobacco segments and hollow segments of tobacco fillers, with high production efficiency; and the entire process is environmentally friendly, without the generation of wastewater and waste residue.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In order to improve the smoke quality of heated cigarettes and reduce costs as much as possible, the embodiment of the present invention provides a method for preparing a feed liquid and a tobacco filler for heated cigarettes, which comprises the following steps:

[0034] a), chopping the first tobacco into pieces to obtain tobacco fragments;

[0035] b), mixing the tobacco fragments with water, heating and refluxing, and collecting tobacco essential oil and water extraction residue;

[0036] c), adding ethanol solution to the water extraction residue, heating and refluxing, cooling and pressing to separate, collecting the extract and the ethanol extraction residue; freezing the extract and centrifuging to obtain a first extract;

[0037] d) cooling and drying the alcohol extraction residue, and then subjecting it to supercritical carbon dioxide extraction to collect the second extract and the supercritical residue;

[0038] e), mixing the tobacco essential oil, the first extract and the second extract to prepare a feed liquid for heating cigarettes;

[0039] f), adding the feed liquid to the second tobacco to prepare tobacco particles to obtain a first tobacco filler; the first tobacco filler is used to be arranged in the tobacco segment of the heated cigarette;

[0040] g), soaking the loaded residue material in essence and then drying it to obtain a second tobacco filler; the second tobacco filler is used to be arranged in the hollow section of the heated cigarette; the loaded residue material is the supercritical residue, and / or the loaded residue material is the residue particles obtained by granulating the supercritical residue after drying.

[0041] The above step a) is a step of pre-treating tobacco. In this step, the first tobacco is chopped to obtain tobacco fragments, thereby increasing the contact area with the extractant during the subsequent steam distillation, alcohol extraction and carbon dioxide supercritical extraction, improving the extraction rate, and facilitating operation. In addition, the residue formed by the tobacco fragments after a series of extractions such as steam distillation, alcohol extraction and carbon dioxide supercritical extraction is also added to the hollow section of the heated cigarette as a load material for the flavor. Preferably, the tobacco fragments are square with a side length of 1 to 2 cm. Although the smaller the size of the tobacco fragments is, the better it is to improve the extraction rate, but the inventors of the present application have found through research that after the load materials formed by the tobacco fragments with too small size absorb the flavor after a series of extractions in the present application scheme, the aroma release rate is too fast, which is easy to cause an unbalanced smoking taste. Therefore, in this embodiment, the side length of the tobacco fragments is preferably controlled to be 1 to 2 cm, thereby both improving the extraction rate and having a suitable aroma release rate after the loaded flavors are extracted. More preferably, the side length of the tobacco fragments is 1 to 1.5 cm.

[0042] Step b) is a step of extracting volatile components in tobacco, namely tobacco essential oil, by steam distillation. Preferably, the mass ratio of water to tobacco fragments in this step is (6-15):1, and the heating and reflux time is 1-6 hours. The heating and reflux operation can be performed in a volatile oil extraction device. After heating and reflux, the tobacco essential oil is collected for standby use, and the water extraction residue (solid-liquid mixture) is further subjected to alcohol extraction according to step c).

[0043] Alcohol extraction can extract the volatile components in the remaining tobacco residue and a small part of the volatile components that are not extracted by water. Further, in step c), adding ethanol solution to the water extraction residue for heating and reflux is specifically: adding 95% ethanol solution to the water extraction residue, heating and reflux at 85-95°C for 0.5-4h; the amount of ethanol solution added is 1-20 times the volume of water in step b). After heating and reflux, it is cooled and squeezed to separate, and the solid residue after solid-liquid separation is the alcohol extraction residue, which is collected for standby use; the liquid after solid-liquid separation is the extract, and the extract is frozen and centrifuged in this step. After freezing, the protein, high carbon alkane and other components in the extract are precipitated, and the component is yellow. The substance will produce an unpleasant odor after heating, so it is precipitated by freezing in this step, and then these smoke-unfriendly components are separated from the extract by centrifugation to improve the smoke quality. Preferably, the freezing temperature in this step is -15 to -25°C, and the freezing time is 24 to 48 hours. After centrifugal filtration, the first extract is obtained for use, and the first extract is not concentrated under reduced pressure to prepare an extract, thereby avoiding the loss of low-boiling point aroma substances in the extract during the reduced pressure concentration process. Collect the alcohol extraction residue and continue to perform carbon dioxide supercritical extraction according to step d).

[0044] The alcohol extraction residue after alcohol extraction still contains more flavor components. In this embodiment, the alcohol extraction residue is further subjected to carbon dioxide supercritical extraction according to d). In this step, the temperature of carbon dioxide supercritical extraction is preferably 40-50° C., the extraction pressure is preferably 28-35 MPa, and the extraction time is preferably 1-3 h. The second extract is obtained after supercritical extraction for standby use, and the supercritical residue after supercritical extraction is also collected for standby use.

[0045] Step e) is a step of mixing the tobacco essential oil, the first extract and the second extract extracted in the above step to prepare a feed liquid. The feed liquid obtained by the above mixing contains most of the flavor components of the tobacco raw material, which ensures the extraction efficiency and avoids the waste of tobacco raw materials, thereby reducing the cost of raw materials while improving the quality of smoke. Preferably, the mixing ratio of the tobacco essential oil, the first extract and the second extract is 1: (10-1000): (0.1-2).

[0046] Step f) is a step of preparing tobacco particles by adding the aforementioned prepared feed liquid to the tobacco raw material (i.e., the above-mentioned second tobacco). Since the feed liquid contains a variety of flavor components such as volatile and non-volatile, it can release a richer aroma when heated, thereby improving the quality of smoke. The preparation process of the tobacco particles in this step can be the same as that of the existing heated cigarette tobacco particles, which will not be repeated here. The second tobacco used in this step can be the same as the first tobacco, or the two can be different. As a preferred embodiment of this embodiment, the first tobacco and the second tobacco are the same tobacco, and according to the principle of homology and homogeneity, the endogenous fragrance of the feed liquid is consistent with that of the tobacco raw material, and the smoke is more coordinated.

[0047] In this embodiment, the residue formed after the first tobacco is successively subjected to steam distillation, alcohol extraction and supercritical extraction of carbon dioxide is reused according to step g). The internal structure of the residue becomes loose after extraction, so the inventor of the present application considers using the residue as a load material for flavor. The specific operation of this step is as follows: the load residue material is soaked in the flavor and then dried to obtain a second tobacco filler. The load residue material can be the aforementioned supercritical residue, the residue particles obtained by granulating the aforementioned supercritical residue after drying, or a mixture of supercritical residue and residue particles. The residue particles can be prepared specifically according to the following method: the supercritical residue is dried, ground, and dry granulated at 80 to 100 ° C for 12 to 24 hours to obtain residue particles. The diameter of the residue particles is preferably 0.5 to 2 mm. The flavor-loaded material (i.e., the second tobacco filler) is arranged in the hollow section of the heated cigarette. The temperature of the smoke when flowing through the hollow section is about 40°C. Placing it in the hollow section can prevent the flavor from being directly heated and evaporated, thereby enhancing its sustained release effect; at the same time, it improves the utilization rate of the tobacco material, further reducing costs while enhancing the aroma.

[0048] It can be seen from the above content that the method for preparing the feed liquid and tobacco filler for heating cigarettes provided in the embodiment of the present invention has the following advantages:

[0049] 1) This application extracts the same batch of tobacco by steam distillation, ethanol extraction, and CO2 supercritical extraction in sequence, so that most of the flavor components in the tobacco can be extracted, ensuring the extraction efficiency and avoiding the waste of tobacco raw materials; then the extracted tobacco essential oil, the first extract, and the second extract are mixed to prepare the feed liquid, thereby improving the quality of the tobacco aroma. This improves the quality of the smoke and reduces the production cost at the same time;

[0050] 2) During the alcohol extraction process, the first extract collected is directly used without vacuum concentration, thereby avoiding the loss of low-boiling point aroma substances in the extract during the vacuum concentration process;

[0051] 3) The alcohol-extracted extract is frozen to separate out a series of smoke-unfriendly components such as proteins and high-carbon alkanes, and then these components are separated from the extract by centrifugation to improve the quality of smoke.

[0052] 4) The residue after steam distillation, alcohol extraction and supercritical carbon dioxide extraction is reused as a flavor loading material, and the second tobacco filler obtained after loading the flavor is added to the empty tube of the heated cigarette to achieve a slow release effect. This method can achieve 100% utilization of tobacco raw materials, further reduce costs while improving the aroma.

[0053] 5) This method can be used to simultaneously prepare the feed liquid and tobacco segments and hollow segments of tobacco fillers, with high production efficiency; and the entire process is environmentally friendly, without the generation of wastewater and waste residue.

[0054] Another embodiment of the present invention provides a particle-type heated cigarette, wherein the tobacco segment is provided with the first tobacco filler prepared by the above method; and the hollow segment is provided with the second tobacco filler prepared by the above method. The particle-type heated cigarette has the advantages of high smoke quality and low cost.

[0055] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0056] Example 1

[0057] Cut tobacco leaves into squares with a side length of 1 cm for later use; take 100g of tobacco and add it to a beaker, add 8 times the amount of water; transfer the mixture to round-bottom flask I of the volatile oil extraction device, and heat and reflux for 4h; collect the obtained tobacco essential oil for later use, transfer the mixture in round-bottom flask I to flask II, and add 95% ethanol solution, calculated by volume, 95% ethanol solution: water is 1:1; put flask II into a water bath device for reflux heating, and the heating temperature is 85℃; reflux heating for 2h, cool and squeeze to separate, and obtain an extract and residual tobacco pieces (i.e. the above-mentioned alcohol extraction residue); put the extract into a freezer for freezing, the temperature is -20℃, and the freezing time is 24h; then centrifuge and filter the extract to obtain a first extract and a yellow substance; cool and dry the residual tobacco pieces, put them into a CO2 supercritical device, perform supercritical extraction, and collect the tobacco extract (i.e. the above-mentioned second extract The invention relates to a method for preparing a heating cigarette by mixing tobacco essential oil, a first extract and a tobacco extract (the second extract) in a ratio of 1:10:1 to prepare a heating cigarette feed liquid; the same tobacco leaves are used to prepare heating cigarette tobacco particles (the first tobacco filler) and the above-mentioned feed liquid is added during the preparation; blueberry flavor is prepared, the dried residue particles and the remaining flaky residue are immersed in the flavor solution, and then taken out for cooling and drying to obtain a second tobacco filler; a granular heating cigarette is prepared, wherein the heating cigarette tobacco particles (the first tobacco filler) are added to the tobacco segment of the heating cigarette, and the second tobacco filler is added to the hollow segment of the granular heating cigarette.

[0058] The tobacco essential oil, the first extract, and the tobacco extract (the second extract) were analyzed by gas chromatography / mass spectrometry to analyze their characteristic chemical components and differences. The aroma components of the tobacco essential oil, the first extract, and the tobacco extract are listed in Tables 1 to 3, respectively.

[0059] Table 1 Aroma components and area normalization results in tobacco essential oil

[0060]

[0061]

[0062] Table 2 Normalized results of aroma components and areas in the first extract

[0063] serial number Retention time / min Area normalization / % name 1 14.14 3.08 Ethyl hexanoate 2 17.34 1.46 Hydroxyacetone 3 23.90 6.60 Acetic acid 4 30.66 10.39 Propylene glycol 5 48.21 71.66 Nicotine 6 53.14 6.82 Neophytadiene

[0064] Table 3 Aroma components and area normalization results in tobacco extracts

[0065] serial number Retention time / min Area normalization / % name 1 30.70 3.96 Propylene glycol 2 48.33 28.30 Nicotine 3 53.68 48.71 Neophytadiene 4 72.98 0.95 Methyl palmitate 5 113.35 6.74 Palmitic acid 6 118.98,120.79 1.81 Tetratetradecane 7 121.79 0.94 Stearic acid 8 122.98 1.67 Oleic acid 9 123.34 0.74 2-Methyl-1-hexadecanol 10 125.18 2.70 Linoleic acid 11 128.39 2.89 Linolenic acid 12 128.90 0.59 Geranyl isovalerate

[0066] The data in Table 1, Table 2 and Table 3 show that there are still a lot of tobacco flavor substances in the tobacco dust and solution after steam distillation. After adding ethanol for extraction, the extract contains a lot of nicotine, followed by propylene glycol, neophytadiene, acetic acid, ethyl hexanoate and hydroxyacetone. After the residual tobacco is subjected to CO2 supercritical extraction, a lot of nicotine and neophytadiene can still be extracted. In addition, megastigmatrienone, damascenone, palmitic acid, methyl palmitate, linolenic acid, etc. are all extracted.

[0067] Example 2

[0068] Cut tobacco leaves into squares with a side length of 1.5 cm for later use; take 100g of tobacco and add it to a beaker, add 10 times the amount of water; transfer the mixture to round-bottom flask I of the volatile oil extraction device, and heat and reflux for 5h; collect the obtained tobacco essential oil for later use, transfer the mixture in round-bottom flask I to flask II, and add 95% ethanol solution, calculated by volume, 95% ethanol solution: water is 1.5:1; put flask II into a water bath device for reflux heating, and the heating temperature is 90°C; reflux heating for 1h, cool and squeeze to separate, and obtain an extract and residual tobacco pieces (i.e., the above-mentioned alcohol extraction residue); put the extract into a freezer for freezing, the temperature is -25°C, and the freezing time is 48h; centrifuge and filter the extract to obtain a first extract and a yellow substance; cool and dry the residual tobacco pieces, put them into a CO2 supercritical device, perform supercritical extraction, and collect the tobacco extract (i.e., the above-mentioned second extract The invention relates to a method for preparing a heating cigarette by mixing tobacco essential oil, a first extract and a tobacco extract (the second extract) in a ratio of 1:50:1.5 to prepare a heating cigarette feed liquid; the same tobacco leaves are used to prepare heating cigarette tobacco particles (the first tobacco filler) and the above-mentioned feed liquid is added during the preparation; mint essence is prepared, and the dried residue particles and the remaining flaky residue are immersed in the essence solution, and then taken out for cooling and drying to obtain a second tobacco filler; a granular heating cigarette is prepared, wherein the heating cigarette tobacco particles (the first tobacco filler) are added to the tobacco segment of the heating cigarette, and the second tobacco filler is added to the hollow segment of the granular heating cigarette.

[0069] Comparative Example 1

[0070] The difference between this embodiment and Example 1 is that no second tobacco filler is added to the hollow segment of the prepared granular heated cigarette.

[0071] Comparative Example 2

[0072] The difference between this embodiment and Example 2 is that the second tobacco filler is not added to the hollow segment of the prepared granular heated cigarette, and the second tobacco filler is added to the tobacco segment.

[0073] Comparative Example 3

[0074] The difference between this example and Comparative Example 1 is that the first tobacco filler in the tobacco segment of the prepared granular heated cigarette does not contain any heated cigarette additive liquid.

[0075] The granular heating cigarettes of Example 1, Example 2, Comparative Example 1, Comparative Example 2 and Comparative Example 3 were evaluated and tested. The test results showed that the granular heating cigarettes prepared in Example 1 and Example 2 had the advantages of improved tobacco aroma richness, blueberry and mint characteristic aroma, no obvious throat irritation, softer smoke, and obvious aroma sustained release effect. Compared with Comparative Example 1, the granular heating cigarette prepared in Example 1 has the advantages of rich tobacco aroma, blueberry characteristic aroma, more delicate and soft smoke, slightly better agglomeration, slight salivation, and no obvious irritation and residue. Compared with Comparative Example 2, the granular heating cigarette prepared in Example 2 has a more obvious aroma sustained release effect; compared with Comparative Example 2, there is almost no mint aroma after 3 puffs, and the mint aroma in Example 2 decreases slightly after 3 puffs, and the mint aroma disappears after 6 or 7 puffs. Compared with Comparative Example 3, the granular heating cigarette prepared in Comparative Example 1 has improved tobacco aroma richness, outstanding smoke permeability, high concentration, and moderate strength overall.

[0076] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for preparing a heating cigarette feed liquid and a tobacco filler, characterized in that: The steps include: a), chopping the first tobacco into pieces to obtain tobacco fragments; b), mixing the tobacco fragments with water, heating and refluxing, and collecting tobacco essential oil and water extraction residue; c), adding 95% ethanol solution to the water extraction residue, heating and reflux at 85-95°C for 0.5-4h; the amount of ethanol solution added is 1-20 times the volume of water in step b); cooling, pressing and separating, collecting the extract and the alcohol extraction residue; freezing the extract and centrifuging to obtain the first extract; the freezing temperature is -15 to -25°C, and the freezing time is 24-48h; d) cooling and drying the alcohol extraction residue, and then subjecting it to supercritical carbon dioxide extraction to collect the second extract and the supercritical residue; e), mixing the tobacco essential oil, the first extract and the second extract to prepare a feed liquid for heating cigarettes; f), adding the feed liquid to the second tobacco to prepare tobacco particles to obtain a first tobacco filler; the first tobacco filler is used to be arranged in the tobacco segment of the heated cigarette; g), soaking the loaded residue material in essence and then drying it to obtain a second tobacco filler; the second tobacco filler is used to be arranged in the hollow section of the heated cigarette; the loaded residue material is the supercritical residue, and / or the loaded residue material is the residue particles obtained by granulating the supercritical residue after drying.

2. The preparation method according to claim 1, characterized in that: The tobacco fragments are square in shape, with a side length of 1 to 2 cm.

3. The preparation method according to claim 1, characterized in that: The tobacco essential oil, the first extract and the second extract are mixed in a ratio of 1:(10-1000):(0.1-2).

4. The preparation method according to claim 1, characterized in that In the step g), the residue particles are prepared specifically according to the following method: the supercritical residue is dried, ground, and dry granulated at 80-100° C. for 12-24 hours to obtain residue particles.

5. The preparation method according to claim 1, characterized in that: In the step b), the mass ratio of water to tobacco fragments is (6-15):1, and the heating reflux time is 1-6 hours.

6. The preparation method according to claim 1, characterized in that The temperature of the carbon dioxide supercritical extraction in step d) is 40-50° C., the extraction pressure is 28-35 MPa, and the extraction time is 1-3 hours.

7. The preparation method according to claim 1, characterized in that: The first tobacco and the second tobacco are the same tobacco.

8. A particle-type heated cigarette, characterized in that: The tobacco segment is provided with a first tobacco filler prepared by the method according to any one of claims 1 to 7; the hollow segment is provided with a second tobacco filler prepared by the method according to any one of claims 1 to 7.

Images