Treatment of tobacco, tobacco and tobacco products

Abstract

The application relates to a tobacco processing method, tobacco and a tobacco product. The tobacco processing method comprises the following steps: mixing tobacco raw materials and water to obtain a tobacco water mixture; mixing an adsorption material with the tobacco water mixture for adsorption treatment to obtain a tobacco processing product; the adsorption material comprises ZSM-5 type molecular sieve, the molar ratio of SiO2 to Al2O3 in the ZSM-5 type molecular sieve is 220-400:1; and the tobacco processing product is sequentially subjected to drying treatment and separation treatment. The tobacco water mixture obtained by mixing the tobacco raw materials and water is subjected to adsorption treatment by using the adsorption material, the type of the adsorption material is controlled, and the molar ratio of SiO2 to Al2O3 in the adsorption material, so that the harmful component TSNA in the tobacco can be effectively removed; the tobacco processing product is sequentially subjected to drying treatment and separation treatment, the tobacco in the same form as the tobacco raw materials can be directly obtained, the process is effectively simplified, the aroma loss is small, and the safety is high.

Description

Technical Field

[0001] This application relates to the field of adsorption technology, and in particular to a method for processing tobacco, tobacco, and tobacco products. Background Technology

[0002] Cigarette smoke is a complex mixture of chemicals, including several tobacco-specific nitrosamines (TSNAs). TSNAs are an abbreviation for tobacco-specific nitrosamines, mainly including NNK (4-(methylnitrosamine)-1-(3-pyridyl)-1-butanone), NNN (N'-nitrosonornicotinamide), NAB (N-nitrosonecholine), and NAT (N-nitrosopseudoestiline). Among them, NNK is a strong carcinogen in cigarette smoke. The safety of products is usually ensured by controlling the content of NNK in the nitrosamines.

[0003] Generally, TSNA is undetectable or present in extremely low amounts in fresh tobacco leaves because the integrity of the fresh tobacco cell separates the TSNA substrate, preventing the nitrosation reaction of alkaloids. During curing, cell integrity is disrupted, creating conditions for TSNA production. Therefore, TSNA mainly forms and accumulates during curing and continues to increase during storage.

[0004] Regarding the processed tobacco leaves, the TSNA content varies greatly among different tobacco types, with the order being: Bukit Tsushima > Dark Air-cured Tobacco > Burley Tobacco > Flue-cured Tobacco > Aromatic Tobacco. This is related to genetics and differences in cultivation and processing methods. The TSNA content of flue-cured tobacco is far lower than that of Burley Tobacco, generally within a safe range, while the TSNA content of Bukit Tsushima, Dark Air-cured Tobacco, and Burley Tobacco often exceeds the safe range significantly. Therefore, when blending tobacco blends, the nitrosamines in Bukit Tsushima, Dark Air-cured Tobacco, and Burley Tobacco are treated to remove nitrosamines before being added to the blend to produce highly safe cigarettes or heat-not-burn products. The traditional process involves extracting aroma components and nitrosamines from the tobacco leaves, treating the extract for nitrosamine removal, processing the extracted tobacco residue into reconstituted tobacco leaves, and then adding the nitrosamine-removed extract through flavoring. However, this process is complex, has a long preparation cycle, and results in significant aroma loss. Summary of the Invention

[0005] Based on this, this application provides a method for processing tobacco that can effectively reduce TSNA content, as well as tobacco and tobacco products.

[0006] The technical solution to the above-mentioned technical problems in this application is as follows.

[0007] This application provides a method for processing tobacco, comprising the following steps:

[0008] Tobacco raw materials are mixed with water to obtain a tobacco-water mixture;

[0009] The adsorbent material is mixed with the tobacco aqueous mixture for adsorption treatment to obtain the tobacco treated product; the adsorbent material includes ZSM-5 molecular sieve, and the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 220~400:1;

[0010] The tobacco product is then subjected to drying and separation processes in sequence.

[0011] In some embodiments, in the tobacco processing method, the mass ratio of the adsorbent material to the tobacco raw material is (0.01~0.1):1.

[0012] In some embodiments, in the tobacco processing method, the ZSM-5 molecular sieve has a plurality of first pore structures, each of which has a pore size of 0.1 nm to 1 nm.

[0013] In some embodiments, the ZSM-5 molecular sieve has a particle size of 0.01 mm to 10 mm in the tobacco processing method.

[0014] In some embodiments, the adsorbent material in the tobacco treatment method further includes crystalline aluminosilicate type A zeolite.

[0015] In some embodiments, in the tobacco processing method, the mass ratio of the crystalline aluminosilicate type A zeolite to the ZSM-5 molecular sieve is (0.1~0.5):1.

[0016] In some embodiments, in the tobacco processing method, the crystalline aluminosilicate type A zeolite has a plurality of second pore structures, each second pore structure having a pore size of 0.1 nm to 1 nm.

[0017] In some embodiments, the crystalline aluminosilicate type A zeolite has a particle size of 0.01 mm to 10 mm in the tobacco processing method.

[0018] In some embodiments, the mass ratio of water to tobacco raw material in the tobacco processing method is (0.1~1):1.

[0019] In some embodiments, the tobacco processing method includes, after mixing tobacco raw materials and water, a step of letting the mixture stand for 1 h to 12 h to obtain the tobacco-water mixture.

[0020] In some embodiments, the drying process for tobacco is carried out at a temperature of 180°C to 220°C for a time of 2 min to 5 min.

[0021] In some embodiments, the tobacco processing method includes at least one of tobacco leaves and shredded tobacco.

[0022] In some embodiments, the tobacco processing method includes the following steps:

[0023] The mixture obtained from the drying process is sieved, and the residue on the sieve is collected to obtain tobacco.

[0024] This application provides a type of tobacco obtained by the above-described tobacco processing method.

[0025] This application provides a tobacco product, including the aforementioned tobacco.

[0026] Compared with the prior art, the tobacco processing method of this application has the following beneficial effects:

[0027] The tobacco processing method of this application first mixes tobacco raw materials with water, and then uses an adsorbent material to adsorb the resulting tobacco-water mixture. By controlling the specific type of adsorbent material and the molar ratio of SiO2 to Al2O3 in that specific type of adsorbent material, the harmful component TSNA in tobacco can be effectively removed, especially NNK, which has a high removal rate. Then, the tobacco processed material is dried and separated in sequence to directly obtain tobacco with a form that is basically the same as that of the tobacco raw material. There is no need to carry out extraction, reconstitute tobacco leaves and flavoring steps, which effectively simplifies the process, shortens the preparation cycle, and results in less aroma loss and higher safety. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the embodiments and examples. It should be understood that these embodiments and examples are for illustrative purposes only and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to enable a more thorough and comprehensive understanding of the disclosure of the present application. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. For example, features described or illustrated as part of one embodiment can be combined in a suitable manner in another embodiment to produce new embodiments. Furthermore, numerous specific details are set forth in the following description to provide a more complete understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0029] 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 in the specification of this application is for descriptive purposes only and is not intended to be limiting of the application.

[0030] Unless otherwise stated or in case of contradiction, the terms or phrases used herein shall have the following meanings:

[0031] In this application, the terms "multiple", "various", "multiple times", etc., unless otherwise specified, refer to a quantity greater than or equal to 2. For example, "one or more" means one or more than or equal to two.

[0032] The terms “combinations of,” “any combination of,” and “any combination of” used in this article include all suitable combinations of any two or more of the listed items.

[0033] In this document, the term "suitable" as used in "suitable combination", "suitable method", "any suitable method", etc., 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.

[0034] In this document, terms such as "preferred," "better," "more suitable," and "ideal" are merely descriptions of more effective implementation methods or embodiments, and should be understood not to limit the scope of protection of this application. If multiple "preferred" terms appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "preferred" term shall be independent.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In this application, when numerical intervals (i.e., numerical ranges) are mentioned, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include numerical interval types such as percentage intervals, ratio intervals, and proportion intervals.

[0039] Unless otherwise specified, the temperature parameters in this application are permitted to be either constant-temperature treatment or variations within a certain temperature range. It should be understood that the constant-temperature treatment allows temperature fluctuations within the precision range of the instrument control, such as ±5℃, ±4℃, ±3℃, ±2℃, or ±1℃.

[0040] In this application, the terms "room temperature" or "normal temperature" generally refer to 4℃ to 35℃, for example, 20℃ ± 5℃. In some embodiments of this application, "room temperature" or "normal temperature" refers to 10℃ to 30℃. In some embodiments of this application, "room temperature" or "normal temperature" refers to 20℃ to 30℃.

[0041] In this application, if the unit of a data range is only followed by the right endpoint, it indicates that the units of the left and right endpoints are the same. For example, 3~5 h means that the units of the left endpoint "3" and the right endpoint "5" are both h (hours).

[0042] All references to documents mentioned in this application are incorporated herein by reference as if each document were individually incorporated by reference. Unless they conflict with the inventive purpose and / or technical solution of this application, all cited documents are incorporated herein by reference in their entirety and for all purposes. When citing documents in this application, the definitions of relevant technical features, terms, nouns, phrases, etc., are also incorporated herein by reference. When citing documents in this application, examples and preferred embodiments of the cited technical features may also be incorporated herein by reference, but only to the extent that they enable the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, this application shall prevail or modifications shall be made adaptably to the description in this application.

[0043] The mass or weight of the relevant components mentioned in the embodiments of this application can refer not only to the specific content of each component, but also to the proportional relationship of mass or weight between the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this application is within the scope disclosed in the embodiments of this application. Specifically, the mass or weight mentioned in the embodiments of this application can be units known in the chemical industry, such as μg, mg, g, and kg.

[0044] Traditional process: tobacco shreds → grinding → extraction → filtration → filtrate → adsorption → concentration → extract; filter residue obtained from filtration → reconstituted tobacco leaves → processed tobacco shreds; extract added to processed tobacco shreds.

[0045] One embodiment of this application provides a method for processing tobacco, including the following steps:

[0046] Step S10: Mix the tobacco raw material with water to obtain a tobacco-water mixture.

[0047] In some of these examples, in step S10, the mass ratio of water to tobacco raw material is (0.1~1):1.

[0048] It is understood that the mass ratio of water to tobacco raw materials includes, but is not limited to, 0.1:1, 0.2:1, 0.3:1, 0.4:1, 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, and 1:1; in some examples, it can be any two of these point values ​​as the end values, and the same applies below.

[0049] In some of these examples, in step S10, the mass ratio of water to tobacco raw material is (0.5~1):1.

[0050] In some of these examples, in step S10, the mass ratio of water to tobacco raw material is (0.8~1):1.

[0051] In some examples, after mixing the tobacco raw materials and water, step S10 also includes a step of letting the mixture stand for 1 h to 12 h to obtain a tobacco-water mixture.

[0052] It is understood that the settling time includes, but is not limited to, 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 7 h, 8 h, 9 h, 10 h, 11 h, and 12 h.

[0053] Mixing tobacco raw materials and water in a specific ratio and allowing them to stand facilitates the removal of harmful TSNA components during subsequent adsorption treatment.

[0054] In some of these examples, in step S10, the tobacco raw material includes at least one of tobacco leaves and shredded tobacco.

[0055] Tobacco shreds are made by cutting whole tobacco leaves into shreds.

[0056] Step S20: The adsorbent material is mixed with the tobacco aqueous mixture for adsorption treatment to obtain the tobacco treated material; the adsorbent material includes ZSM-5 molecular sieve, and the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 220~400:1.

[0057] It is understood that the molar ratio of SiO2 to Al2O3 in ZSM-5 molecular sieves includes, but is not limited to, 220:1, 230:1, 240:1, 250:1, 260:1, 270:1, 280:1, 290:1, 300:1, 310:1, 320:1, 330:1, 340:1, 350:1, 360:1, 370:1, 380:1, 390:1, and 400:1.

[0058] In some examples, in step S20, the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 220~360:1. Further, the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 220~300:1.

[0059] In some of these examples, in step S20, the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 260~360:1.

[0060] In some of these examples, in step S20, the mass ratio of the adsorbent material to the tobacco raw material is (0.01~0.1):1.

[0061] It is understood that the mass ratio of the adsorbent material to the tobacco raw material includes, but is not limited to, 0.01:1, 0.02:1, 0.03:1, 0.04:1, 0.05:1, 0.06:1, 0.07:1, 0.08:1, 0.09:1, and 0.1:1.

[0062] In some of these examples, in step S20, the mass ratio of the adsorbent material to the tobacco raw material is (0.05~0.1):1.

[0063] By controlling the mass ratio of adsorbent material to tobacco raw material, harmful TSNA can be further removed while ensuring minimal aroma loss.

[0064] In some of these examples, in step S20, the ZSM-5 molecular sieve has multiple first pore structures, each with a pore size of 0.1 nm to 1 nm.

[0065] It is understood that the pore sizes of the various first pore structures can be the same or different, as long as they fall within this range. Furthermore, the pore sizes of the various first pore structures include, but are not limited to, 0.1 nm, 0.2 nm, 0.3 nm, 0.4 nm, 0.5 nm, 0.6 nm, 0.7 nm, 0.8 nm, 0.9 nm, and 1 nm.

[0066] In some of these examples, in step S20, the pore size of each first pore structure is 0.3 nm to 0.8 nm.

[0067] In some of these examples, in step S20, the particle size of the ZSM-5 molecular sieve is 0.01 mm to 10 mm.

[0068] It is understood that the particle size of ZSM-5 molecular sieves includes, but is not limited to, 0.01 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm.

[0069] In some of these examples, in step S20, the particle size of the ZSM-5 molecular sieve is 1 mm to 7 mm.

[0070] In some of these examples, in step S20, the particle size of the ZSM-5 molecular sieve is 2 mm to 5 mm.

[0071] By controlling the pore size and particle size of ZSM-5 molecular sieves, harmful TSNA components can be further removed while ensuring minimal aroma loss.

[0072] In some of these examples, in step S20, the adsorbent material also includes crystalline aluminosilicate type A zeolite.

[0073] In some examples, in step S20, the mass ratio of crystalline aluminosilicate type A zeolite to ZSM-5 molecular sieve is (0.1~0.5):1.

[0074] It is understood that the mass ratio of crystalline aluminosilicate type A zeolite to ZSM-5 molecular sieve includes, but is not limited to, 0.1:1, 0.15:1, 0.2:1, 0.25:1, 0.3:1, 0.35:1, 0.4:1, 0.45:1, and 0.5:1.

[0075] In some examples, in step S20, the mass ratio of crystalline aluminosilicate type A zeolite to ZSM-5 molecular sieve is (0.3~0.5):1.

[0076] By combining crystalline aluminosilicate type A zeolite with ZSM-5 molecular sieve in a specific ratio, the harmful component TSNA can be further removed while ensuring minimal aroma loss.

[0077] In some of these examples, in step S20, the crystalline aluminosilicate type A zeolite has multiple secondary pore structures, each with a pore size of 0.1 nm to 1 nm.

[0078] It is understood that the pore sizes of the various second pore structures can be the same or different, as long as they fall within this range. Furthermore, the pore sizes of the various second pore structures include, but are not limited to, 0.1 nm, 0.2 nm, 0.3 nm, 0.4 nm, 0.5 nm, 0.6 nm, 0.7 nm, 0.8 nm, 0.9 nm, and 1 nm.

[0079] In some of these examples, in step S20, the pore size of each second pore structure is 0.3 nm to 0.8 nm.

[0080] In some of these examples, in step S20, the particle size of the crystalline aluminosilicate type A zeolite is 0.01 mm to 10 mm.

[0081] It is understood that the particle size of crystalline aluminosilicate type A zeolite includes, but is not limited to, 0.01 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm.

[0082] In some of these examples, in step S20, the particle size of the crystalline aluminosilicate type A zeolite is 1 mm to 7 mm.

[0083] In some of these examples, in step S20, the particle size of the crystalline aluminosilicate type A zeolite is 2 mm to 5 mm.

[0084] In some of these examples, in step S20, the porosity of the adsorbent material is ≥50%.

[0085] Furthermore, the porosity of the adsorbent material is 70%~90%.

[0086] It is understood that the porosity of the adsorbent material includes, but is not limited to, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, and 90%.

[0087] It is understandable that the adsorbent material is mixed with the tobacco-water mixture and then left to stand for adsorption treatment.

[0088] In some of these examples, the adsorption treatment time in step S20 is 12 h to 48 h.

[0089] It is understood that the adsorption treatment time includes, but is not limited to, 12 h, 13 h, 15 h, 18 h, 20 h, 22 h, 23 h, 25 h, 28 h, 30 h, 32 h, 33 h, 35 h, 38 h, 40 h, 42 h, 43 h, 45 h, and 48 h.

[0090] Step S30: The tobacco processed material is sequentially dried and separated.

[0091] The tobacco processing method of this application first mixes tobacco raw materials with water, and then uses an adsorbent material to adsorb the resulting tobacco-water mixture. By controlling the specific type of adsorbent material and the molar ratio of SiO2 to Al2O3 in that specific type of adsorbent material, the harmful component TSNA in tobacco can be effectively removed, especially NNK, which has a high removal rate. Then, the tobacco processed material is dried and separated in sequence to directly obtain tobacco with a form that is basically the same as that of the tobacco raw material. There is no need to carry out extraction, reconstitute tobacco leaves and flavoring steps, which effectively simplifies the process, shortens the preparation cycle, and results in less aroma loss and higher safety.

[0092] Studies have found that traditional adsorption materials such as activated carbon, which are effective at removing nitrosamines from tobacco extracts, are less effective at removing them from tobacco leaves or shredded tobacco.

[0093] In some of these examples, in step S30, the drying temperature is 180°C to 220°C and the time is 2 min to 5 min.

[0094] It is understood that the drying temperature includes, but is not limited to, 180℃, 185℃, 190℃, 195℃, 200℃, 205℃, 210℃, 215℃, and 220℃, and the time includes, but is not limited to, 2 min, 3 min, 4 min, and 5 min.

[0095] In some of these examples, step S30, the separation process includes the following steps:

[0096] The mixture obtained from the drying process is sieved, and the residue on the sieve is collected to obtain tobacco.

[0097] One embodiment of this application provides a tobacco product obtained using the tobacco processing method described above.

[0098] The tobacco provided in this application has a low TSNA content and retains its aroma relatively well.

[0099] One embodiment of this application provides the use of tobacco prepared by the above-described tobacco processing method in the preparation of tobacco products. Another embodiment of this application provides a tobacco product comprising tobacco prepared by the above-described tobacco processing method.

[0100] Tobacco products processed using the above-mentioned tobacco processing methods can better retain the original aroma characteristics of tobacco, bringing consumers a better sensory experience, and have a lower TSNA content.

[0101] It is understood that the tobacco obtained through the processing of this application can be used as a raw material for tobacco flavorings in common tobacco products in the art, such as cigarettes, e-cigarettes, and heated tobacco products. The tobacco extract of this application can be applied to cigarettes, e-cigarettes, and heated tobacco products in different ways according to their characteristics, and has the effects of enhancing aroma quality and aroma quantity, enriching tobacco aroma, increasing smoke concentration and permeability, etc.

[0102] The present application will be described in further detail below with reference to specific embodiments, but the embodiments of the present application are not limited thereto.

[0103] The crystalline aluminosilicate type A zeolite used in the following examples and comparative examples is from Taizhou Mingrui Teaching Equipment Co., Ltd.; the ZSM-5 molecular sieve is from Fuyu New Materials Technology Co., Ltd.

[0104] Example 1

[0105] (1) The tobacco raw material is placed in a sealed container, deionized water is added, and the tobacco is allowed to stand for 1 h to soak the tobacco to obtain a tobacco water mixture; wherein the mass ratio of deionized water to tobacco raw material is 1:1.

[0106] (2) The adsorbent material (crystalline aluminosilicate type A zeolite and ZSM-5 molecular sieve with a mass ratio of 3:7) was added to the tobacco aqueous mixture, mixed evenly, and allowed to stand for adsorption treatment for 12 h to obtain the tobacco treated material; wherein, the mass ratio of the adsorbent material to the tobacco raw material was 0.1:1; the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve was 220:1, the pore size was 0.5 nm, and the particle size was 3 mm; the pore size of the crystalline aluminosilicate type A zeolite was 0.5 nm, and the particle size was 3 mm;

[0107] (3) Place the tobacco processed material in an oven at 220°C and bake it quickly for 2.5 min to make the moisture content of the tobacco shreds consistent with that of the raw tobacco shreds before processing;

[0108] (4) Sieve to separate the adsorbent material from the tobacco shreds to obtain the treated tobacco shreds.

[0109] Example 2

[0110] (1) The tobacco raw material is placed in a sealed container, deionized water is added, and the tobacco is allowed to stand for 12 h to soak the tobacco to obtain a tobacco water mixture; wherein, the mass ratio of deionized water to tobacco raw material is 0.1:1;

[0111] (2) The adsorbent material (ZSM-5 molecular sieve, with a molar ratio of SiO2 to Al2O3 of 220:1, a pore size of 0.5 nm, and a particle size of 3 mm) was added to the tobacco water mixture. After mixing evenly, the mixture was allowed to stand for adsorption treatment for 12 h to obtain the tobacco treated material. The mass ratio of the adsorbent material to the tobacco raw material was 0.01:1.

[0112] (3) Place the tobacco processed material in an oven at 180°C and bake it quickly for 2.5 min to make the moisture content of the tobacco shreds consistent with that of the raw tobacco shreds before processing;

[0113] (4) Sieve to separate the adsorbent material from the tobacco shreds to obtain the treated tobacco shreds.

[0114] Example 3

[0115] The process is basically the same as in Example 1, except that in step (2), the adsorbent material is only ZSM-5 molecular sieve, the molar ratio of SiO2 to Al2O3 is 220:1, the pore size is 0.5 nm, and the particle size is 3 mm.

[0116] Example 4

[0117] It is basically the same as Example 1, except that in step (2), the molar ratio of SiO2 to Al2O3 in ZSM-5 molecular sieve is 300:1.

[0118] Example 5

[0119] It is basically the same as Example 1, except that in step (2), the molar ratio of SiO2 to Al2O3 in ZSM-5 molecular sieve is 400:1.

[0120] Example 6

[0121] The process is basically the same as in Example 1, except that in step (2), the mass ratio of crystalline aluminosilicate type A zeolite to ZSM-5 molecular sieve is 0.1:1.

[0122] Example 7

[0123] It is basically the same as Example 1, except that in step (2), the mass ratio of the adsorbent material to the tobacco raw material is 0.05:1.

[0124] Comparative Example 1

[0125] The process is basically the same as in Example 1, except that the adsorbent material (crystalline aluminosilicate type A zeolite and ZSM-5 molecular sieve in a mass ratio of 3:7) in step (2) of Example 1 is replaced with an equal mass of activated carbon.

[0126] Comparative Example 2

[0127] The process is basically the same as in Example 1, except that the adsorbent material (a type A crystalline aluminosilicate zeolite and a ZSM-5 molecular sieve with a mass ratio of 3:7) in step (2) of Example 1 is replaced with an equal mass of HY molecular sieve.

[0128] Comparative Example 3

[0129] It is basically the same as Example 1, except that in step (2), the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve adsorbent is 50:1.

[0130] The adsorbent material parameters for the tobacco shreds treated in each embodiment and comparative example are shown in Table 1. Here, "ZSM-5" refers to ZSM-5 type molecular sieve; "SiO2:Al2O3" refers to the molar ratio of SiO2 to Al2O3 in the ZSM-5 type molecular sieve; "Type A zeolite" refers to crystalline aluminosilicate type A zeolite; "zeolite:ZSM-5" refers to the mass ratio of crystalline aluminosilicate type A zeolite to ZSM-5 type molecular sieve; and "adsorbent material: tobacco shreds" refers to the mass ratio of the adsorbent material to the raw tobacco shreds.

[0131] Table 1

[0132]

[0133] The treated tobacco and untreated tobacco raw materials of each embodiment and comparative example were sent to TSNA for testing. The testing method was in accordance with the standard YC / T 184-2004 Determination of tobacco-specific N-nitrosamines in tobacco and tobacco products.

[0134] The treated tobacco and untreated tobacco raw materials of each embodiment and comparative example were smoked and sensory evaluated according to the standard YC / T 138-1998 Sensory Evaluation Method for Tobacco and Tobacco Products.

[0135] The results are shown in Table 2.

[0136] Table 2

[0137]

[0138] As can be seen from Table 2, compared with the active materials used in Comparative Examples 1 and 2, each example used a specific type of activated carbon, which had a better effect on removing NNK and less loss of smoke aroma; the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve used in Comparative Example 3 was smaller, and the effect on removing NNK was better than that in Comparative Examples 1 and 2, but significantly worse than that in the examples.

[0139] 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.

[0140] The embodiments described above are merely illustrative of several implementation methods of this application, intended to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection 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 scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A method for processing tobacco, characterized in that, Includes the following steps: Tobacco raw materials are mixed with water to obtain a tobacco-water mixture; The adsorbent material is mixed with the tobacco aqueous mixture for adsorption treatment to obtain the tobacco treated product; the adsorbent material includes ZSM-5 molecular sieve, and the molar ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 220~400:1; The tobacco product is then subjected to drying and separation processes in sequence.

2. The tobacco processing method as described in claim 1, characterized in that, The mass ratio of the adsorbent material to the tobacco raw material is (0.01~0.1):

1.

3. The tobacco processing method as described in claim 1, characterized in that, The ZSM-5 molecular sieve has multiple first pore structures, each with a pore size of 0.1 nm to 1 nm; and / or The ZSM-5 molecular sieve has a particle size of 0.01 mm to 10 mm.

4. The method for processing tobacco as described in any one of claims 1 to 3, characterized in that, The adsorbent material also includes crystalline aluminosilicate type A zeolite.

5. The tobacco processing method as described in claim 4, characterized in that, The mass ratio of the crystalline aluminosilicate type A zeolite to the ZSM-5 molecular sieve is (0.1~0.5):1; and / or The crystalline aluminosilicate type A zeolite has multiple second-pore structures, each with a pore size of 0.1 nm to 1 nm; and / or The particle size of the crystalline aluminosilicate type A zeolite is 0.01 mm to 10 mm.

6. The method for processing tobacco as described in any one of claims 1 to 3 and 5, characterized in that, The mass ratio of water to tobacco raw material is (0.1~1):1; and / or The tobacco raw materials include at least one of tobacco leaves and shredded tobacco.

7. The method for processing tobacco as described in any one of claims 1 to 3 and 5, characterized in that, After mixing tobacco raw materials and water, the process further includes a step of letting the mixture stand for 1 h to 12 h to obtain the tobacco-water mixture.

8. The method for processing tobacco as described in any one of claims 1 to 3 and 5, characterized in that, The drying process is performed at a temperature of 180℃~220℃ for a time of 2 min~5 min; and / or The separation process includes the following steps: The mixture obtained from the drying process is sieved, and the residue on the sieve is collected to obtain tobacco.

9. A type of tobacco, characterized in that, Obtained by the tobacco processing method as described in any one of claims 1 to 8.

10. A tobacco product, characterized in that, Including the tobacco as described in claim 9.

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