A tobacco particle for a heat-not-burn cigarette having strong CO adsorption and high water wettability and a method of preparing the same
By loading organometallic complexes into porous solid materials, the problems of weak CO adsorption and insufficient water content in heated cigarettes have been solved, achieving efficient CO adsorption and improved water content of tobacco particles, thereby improving the health and taste of tobacco.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA TOBACCO ANHUI IND CO LTD
- Filing Date
- 2024-03-18
- Publication Date
- 2026-05-12
AI Technical Summary
Existing tobacco particles have a weak ability to adsorb carbon monoxide and insufficient moisture content, which affects the health and taste of heated cigarettes.
Organometallic complexes are loaded onto porous solid materials to prepare particulate additives, which are then mixed with tobacco components. Through steps such as impregnation, drying, and extrusion, heated cigarette tobacco particles with strong CO adsorption and high water wettability are prepared.
It significantly reduces CO emissions in cigarette smoke, improves the moisture content of tobacco particles, and enhances the smoking experience.
Smart Images
Figure BDA0004746370890000051
Abstract
Description
Technical Field
[0001] This invention belongs to the field of heated cigarettes, specifically relating to a heated cigarette tobacco particle with strong CO adsorption and high moisture content, and its preparation method. Background Technology
[0002] Heated cigarettes deliver flavor components and nicotine from the cigarette filler material to the consumer through heating without combustion. Simultaneously, the release of harmful substances produced by high-temperature combustion is significantly reduced, leading to widespread consumer acceptance in recent years. Research has found that the main harmful substances in heated cigarette smoke include carbon monoxide, nitrogen oxides, phenols, volatile nitrogen compounds, hydrogen cyanide, and some tobacco-specific heterocyclic compounds. CO release is the highest among these, posing a significant health risk. Therefore, reducing CO emissions is essential for the survival and development of the tobacco industry. In recent years, public awareness of smoking and health issues has increased. Tobacco researchers have conducted extensive research in tobacco production, processing, and tar reduction technologies to better protect consumer health and reduce the harm caused by tobacco products. They have developed new methods, including biotechnology and new materials technology, and successfully applied them in tobacco production.
[0003] The research and development of new materials and methods for strongly adsorbing CO from flue gas has always been a hot topic in this field. Organometallic adsorbents exhibit strong chemical adsorption of CO gas molecules, especially when the metal oxidation state is low. Covalent bonds are formed between the metal center in the adsorbent and the target gas, enhancing the adsorption effect on CO. Furthermore, they can lock in tobacco moisture without absorbing external moisture, maintaining the tobacco's moisture content. In this invention, organometallic complexes are further loaded onto porous solid materials such as activated carbon particles, chitosan hydrogels, and sodium alginate hydrogels to prepare solid particulate additives. These additives can achieve highly efficient CO adsorption, reducing the amount of CO released from flue gas. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a heated cigarette tobacco particle with strong CO adsorption and high water wettability, and its preparation method, which solves the technical problems of weak adsorption capacity for residual CO and poor water wettability of existing tobacco particles.
[0005] To solve the technical problem, the present invention adopts the following technical solution:
[0006] This invention provides heated cigarette tobacco particles with strong CO adsorption and high water wettability. The heated cigarette tobacco particles are made by adding porous solid particles loaded with organometallic complexes to the tobacco components, thereby improving the problems of weak CO adsorption and poor water wettability of existing tobacco particles.
[0007] This invention further provides a method for preparing the strongly CO-adsorbing and highly wettable heated cigarette tobacco particles, comprising the following steps:
[0008] (1) Dissolve the organometallic complex ligand in an organic solvent to prepare an organometallic complex impregnation solution;
[0009] (2) The tobacco components are ultra-finely pulverized to obtain tobacco powder with a particle size of no more than 0.15 mm;
[0010] (3) The porous solid material and the tobacco powder are immersed in an organometallic complex impregnation solution for wetting;
[0011] (4) Wash the mixed solution from step (3) with deionized water, dry the precipitate in a vacuum drying oven, crush and sieve to obtain tobacco powder; mix the tobacco powder and atomizing agent and stir evenly, then place it in a variable density extruder for uniform extrusion, roll the extruded material into rounds and sieve to obtain heated cigarette tobacco particles.
[0012] Further, in step (1), the metal in the organometallic complex ligand is at least one of Ni, Fe, and Co. The organometallic complex ligand includes M(R), wherein: M represents at least one of Ni(O), Fe(O), and Co(O); R is a single component or multiple components selected from at least one of H, Cl, Br, F, CN (cyano), C-1-C-6 alkyl or C-3-C-6 cycloalkyl substituted with one or more halogens.
[0013] Further, in step (1), the organic solvent includes at least one of ethanol, isopropanol, propylene glycol, ethyl acetate, and tetrahydrofuran.
[0014] Furthermore, in step (2), the tobacco component is at least one of flue-cured tobacco, burley tobacco, and aromatic tobacco.
[0015] Further, in step (3), the porous solid material includes at least one of activated carbon, chitosan hydrogel and sodium alginate hydrogel.
[0016] Furthermore, in step (3), the soaking time is 10 to 15 hours.
[0017] Furthermore, the organometallic complex ligand accounts for 0.5 to 3 wt% of the porous solid material, and the porous solid material accounts for 2 to 10 wt% of the tobacco powder.
[0018] Further, the specific method of step (4) is as follows: wash the mixed solution of step (3) with deionized water, dry the precipitate in a vacuum drying oven, crush it through a 100-mesh sieve to obtain tobacco powder; mix the tobacco powder and atomizing agent and stir evenly, then place it in a variable density extruder for uniform extrusion, and roll the extruded material on a rolling mill with a speed of 500-1200 r / min. The rolled tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence to obtain heated cigarette tobacco particles with a particle size between 0.280 and 0.840 mm as the final sample; wherein, the atomizing agent accounts for 20-30 wt% of the tobacco powder mass.
[0019] Further, in step (4), the atomizing agent is glycerol or propylene glycol, or a mixture of glycerol and propylene glycol in a mass ratio of 1 to 3:1.
[0020] Compared with existing technologies, the beneficial effects of this invention are reflected in:
[0021] The heated cigarette tobacco particles provided by this invention involve adding porous solid particles loaded with organometallic complexes to the tobacco component. This enables highly efficient adsorption of CO, reducing CO release from the smoke, and significantly improving the wettability of the tobacco. In other words, the preparation method provided by this invention effectively improves the problem of weak CO adsorption in existing tobacco particles while also enhancing the water retention of the tobacco particles without absorbing water. Detailed Implementation
[0022] The following examples are intended to illustrate the content of the present invention, and not to further limit the scope of protection of the present invention.
[0023] Example 1
[0024] S1. Take 0.05g of organocnidium complex ([Ni(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0025] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0026] S3. Immerse 2.5g of activated charcoal and 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0027] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0028] Example 2
[0029] S1. Take 0.05g of organocnidium complex ([Ni(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0030] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0031] S3. Immerse 2.5g of chitosan hydrogel and 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0032] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0033] Example 3
[0034] S1. Take 0.05g of organocnidium complex ([Ni(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0035] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0036] S3. Immerse 2.5g of sodium alginate hydrogel and 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0037] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0038] Example 4
[0039] S1. Take 0.05g of the organic iron complex ([Fe(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0040] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0041] S3. Immerse 2.5g of activated charcoal and 50g of tobacco in the above impregnation solution and soak for 10 hours.
[0042] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0043] Example 5
[0044] S1. Take 0.05g of the organocobalt complex ([Co(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0045] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0046] S3. Immerse 2.5g of activated charcoal and 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0047] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0048] Comparative Example 1
[0049] S1. Take 0.05g of organocnidium complex ([Ni(F)2]). 2- Dissolve it in 60 mL of ethanol to prepare the impregnation solution.
[0050] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0051] S3. Immerse 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0052] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0053] Comparative Example 2
[0054] S1. Measure 60 mL of ethanol directly as the impregnation solution.
[0055] S2. The flue-cured tobacco is pulverized into tobacco powder with a particle size of no more than 0.15 mm.
[0056] S3. Immerse 2.5g of activated charcoal and 50g of tobacco powder in the above impregnation solution and soak for 10 hours.
[0057] S4. Wash the mixed solution from step S3 with deionized water, and dry the precipitate in a vacuum drying oven. Crush the precipitate through a 100-mesh sieve to obtain tobacco powder for later use. Mix glycerol with the tobacco powder and stir evenly. Take out the material (glycerol accounts for 25 wt% of the tobacco powder mass) and place it in a variable density extruder for uniform extrusion. Roll the extruded material into rounds at a speed of 1200 r / min. The rounded tobacco particles are then passed through 0.840 mm and 0.280 mm sieves in sequence. Select tobacco particles between 0.280 and 0.840 mm as the final sample.
[0058] The amount of CO released by heating tobacco particles obtained in each example and comparative example was determined using in-situ DRIFTS technology: (12±1) mg of tobacco particles were weighed and placed in a DRIFTS reaction cell. The temperature was increased from 50°C to 300°C at a rate of 20°C / min and held for 10 min. The carrier gas flow rate was 60 mL / min, and the test atmosphere was air. The pyrolysis products were detected in real time in the DRIFTS reaction cell, with a wavenumber range of 450–4000 cm⁻¹. -1 The scanning frequency is 32 scans / second, and the resolution is 4cm. -1 The test results are shown in Table 1.
[0059] The moisture content determination of the tobacco particles obtained in each embodiment and comparative example followed the requirements of YC / T31-1996 "Preparation and Moisture Determination of Tobacco and Tobacco Products Samples - Oven Method" for testing tobacco and tobacco products: With the weighing instrument at 0.000g, 2-3g of pulverized tobacco particles, dried at low temperature, were placed in the sample pan, evenly spread, and the heating chamber cover was closed. After selecting "Start," heating and measurement began. At the end of the test, the instrument automatically displayed the moisture content of the sample. Selecting "Zero" returned the instrument to the weighing state. The next sample could be measured after the test chamber temperature dropped below 50℃. The test results are shown in Table 1.
[0060] Table 1
[0061]
[0062] As shown in Table 1, the CO release from the tobacco in the examples was lower than that in the comparative example, with the optimal addition amount of organometallic complex being 0.05 g. Furthermore, in the smoke analysis, the CO release from tobacco with organometallic complex-loaded porous solid material was lower than that from tobacco with only organometallic complex or porous solid material added. The moisture content of the tobacco was tested using standard methods, and the table shows that the addition of organometallic complex helps enhance the wettability of the tobacco particles. These results demonstrate the strong adsorption of CO released from the smoke by tobacco with organometallic complex-loaded porous solid material. Simultaneously, the hydrophilicity of the organometallic complex enhances the wettability of the cigarette, thereby improving the smoking experience.
[0063] The above description is merely an exemplary embodiment of the present invention. It should be noted that those skilled in the art can make corresponding adjustments and improvements without departing from the principle of the present invention, and these adjustments and improvements should also be considered within the scope of protection of the present invention.
Claims
1. A method for preparing heated cigarette tobacco particles with strong CO adsorption and high water wettability, characterized in that, Includes the following steps: (1) Dissolve the organometallic complex ligand in an organic solvent to prepare an organometallic complex impregnation solution; (2) Obtain tobacco powder with a particle size of no more than 0.15 mm by ultra-fine grinding of tobacco components; (3) Immerse the porous solid material and the tobacco powder in an organometallic complex impregnation solution for wetting; (4) Wash the mixed solution from step (3) with deionized water, and dry the precipitate in a vacuum drying oven, crush and sieve it to obtain tobacco powder; mix the tobacco powder and atomizing agent and stir evenly, then place it in a variable density extruder for uniform extrusion, roll the extruded material into rounds and sieve it to obtain heated cigarette tobacco granules; In step (1), the metal in the organometallic complex ligand is at least one of Ni, Fe, and Co; the organometallic complex ligand includes M(R), wherein: M represents at least one of Ni(O), Fe(O), and Co(O); R is a single component or multiple components selected from at least one of H, Cl, Br, F, CN, C-1-C-6 alkyl or C-3-C-6 cycloalkyl substituted with one or more halogens; In step (3), the porous solid material includes at least one of activated carbon, chitosan hydrogel and sodium alginate; The organometallic complex ligand accounts for 0.5 to 3 wt% of the porous solid material, and the porous solid material accounts for 2 to 10 wt% of the tobacco powder.
2. The preparation method according to claim 1, characterized in that, In step (1), the organic solvent includes at least one of ethanol, isopropanol, propylene glycol, ethyl acetate and tetrahydrofuran.
3. The preparation method according to claim 1, characterized in that, In step (2), the tobacco component is at least one of flue-cured tobacco, burley tobacco, and aromatic tobacco.
4. The preparation method according to claim 1, characterized in that, In step (3), the soaking time is 10 to 15 hours.
5. The preparation method according to claim 1, characterized in that, The specific method of step (4) is as follows: wash the mixed solution of step (3) with deionized water, dry the precipitate in a vacuum drying oven, crush it through a 100-mesh sieve to obtain tobacco powder; mix the tobacco powder and atomizing agent and stir evenly, then place it in a variable density extruder for uniform extrusion, roll the extruded material on a rounding machine with a speed of 500-1200 r / min, and pass the rounded tobacco particles through 0.840 mm and 0.280 mm sieves in sequence to obtain heated cigarette tobacco particles with a particle size between 0.280 and 0.840 mm as the final sample; wherein, the atomizing agent accounts for 20 to 30 wt% of the tobacco powder mass.
6. The preparation method according to claim 1 or 5, characterized in that: The atomizing agent is glycerol or propylene glycol, or a mixture of glycerol and propylene glycol in a mass ratio of 1 to 3:
1.
7. Heated cigarette tobacco pellets prepared by any one of claims 1 to 6.