Multifilter device for Hoffmann compounds in gaseous media

Abstract

The present invention relates to a multi-adsorption filter device capable of selectively and simultaneously reducing or removing the content of toxic compounds from tobacco product smoke or aerosols, wherein the toxic compounds belong to at least four groups of Hoffmann compounds in a gaseous medium, including carbonyls, volatile organic compounds, polycyclic aromatic hydrocarbons, and nitrosamines. The device consists of a macroporous polymer structure filter portion and a cellulose acetate portion, the macroporous polymer structure filter portion being composed of very high molecular weight polyethylene acting as a support and binder for the adsorbent, and the adsorbent is specially selected and quantified.

Description

Technical Field

[0001] The particulate and vapor fractions in the smoke of a cigarette contain thousands of substances. Among these, there are groups or families of substances that are particularly undesirable due to their toxicity. Indiscriminate filtration to remove or reduce these also eliminates non-toxic substances that provide the characteristic flavor and aroma of the cigarette, thus affecting its commercial value. Selective filtration aims to reduce or remove undesirable smoke products by improving the health profile while respecting sensory properties. Compounds or families harmful to health are often called Hoffmann compounds or families, and they are classified by their chemical structure and functionality.

Summary of the Invention

[0002] The filter that receives the patent is characterized by selectivity for volatile substances, carbonyls, and polycyclic aromatic hydrocarbon families.

[0003] Interest in and the presence of selective filters in the market are not new. A typical example is the activated carbon particles on cellulose acetate fibers of the "Dulcissimo" filter, which has been known for decades. Carbon has selectivity for carbonyls, and an enhanced version of this property resulted from the development by Celanese. Its novelty results from achieving a high concentration of activated carbon incorporated in a highly porous support (CelFx technology). Following the contract with Celanese, the owner has utilized this development in various versions in the Floyd cigarette brand. Patent Document 1, which is the original patent of Celanese, suggests the possibility of studying the use of this porous body as a support for countless possible materials and chemical substances, including new forms of carbon such as graphene, nanotubes, and fullerenes. However, in fact, so far, it has not been applied to any market products. This impossibility of implementation turns the current invention into a theoretical possibility without any industrial use. Furthermore, Celanese has not continued a series of research based on its porous body.

[0004] The present inventors' invention essentially includes a device capable of selectively and simultaneously reducing or removing the content of at least four Hoffmann groups in a gaseous medium. Hereinafter, this will be referred to as a "multifilter device" (MFD).

[0005] While emphasizing the broad applicability of the MFD object of the present invention, the present invention expands the field of filtering emissions from current tobacco industry products (cigarettes, RYO, HNB, etc.).

[0006] International Publication No. 2012 / 054111 The inventors' MFDs include a polymer structure of a highly macroporous support for the adsorbent. This high porosity facilitates the circulation of the purified gaseous substance and its contact with the agent. These adsorbents are selected to act primarily on the chemical groups of the following smoke compounds: a) carbonyl compounds, b) polycyclic aromatic hydrocarbons, c) nitrosamines, and d) volatile organic compounds (VOCs). Of these groups, a), b), and d) are produced by thermal decomposition, thermal synthesis, and / or incomplete combustion from precursors naturally present in the tobacco plant, while group c) is primarily produced by biological processes during the "curing" of tobacco. The design of this multi-filter system, its selective and simultaneous operation, and its apparent potential to incorporate other adsorbents for other toxic groups represent an entirely novel aspect of the present invention. Conventional technology

[0007] 1) China Patent Application Publication No. 106036999, China, August 8, 2016, PRETTECH MACHINERY CO LTD

[0008] Title of Invention: Composite Cigarette Filter Tip

[0009] The present invention relates to a composite paper cigarette filter tip, which includes a filter tip portion near the lip end, a filter tip portion near the tobacco end, and a rolling paper. The filter tip portion near the lip end is provided with a fiber filtration layer, and the filter tip portion near the tobacco end is provided with a metal sintered porous filtration layer. The metal sintered porous filtration layer is a precision filtration element made of a metal powder sintered porous filter material. The metal powder sintered porous filter material is manufactured using metal particles as a raw material, and integral molding is achieved by a formation technique after pretreatment. The metal powder sintered porous filter material is formed after sintering. The filter material has high filtration accuracy, good filtration effect, a uniform structure and good reproducibility, so the filter tip of compound cigarettes does not deform, it has a very good filtration effect against nicotine, tar, nitrosamines and other non-gas phase toxic and harmful substances, does not absorb the beneficial aromatic components of cigarettes, has a high melting point and does not cause over-combustion that generates carcinogens, prevents charring and toxic smoke (produced by charring of the filter tip), has a good cooling effect, and gives cigarettes a refreshing and invigorating feeling.

[0010] 2) China Patent Application Publication No. 106072761, China, August 5, 2016, CHINA TOBACCO FUJIAN CO LTD

[0011] Title of Invention: Method for reducing the content of specific N-nitrositamines in tobacco in mainstream cigarette smoke.

[0012] This invention provides a method for reducing the content of specific N-nitrosamines in tobacco in mainstream cigarette smoke. The method comprises the step of adding 2,6-di-t-butyl-4methylphenol to a cigarette. This method can effectively reduce the content of specific N-nitrosamines in tobacco in mainstream cigarette smoke without affecting the sensory quality of the cigarette.

[0013] 3) China Utility Model Application No. 205512329, China, August 31, 2016, CHINA TOBACCO SHAANXI IND CO LTD

[0014] Title of Invention: Filter part for reducing harmful substances in cigarettes

[0015] This utility model provides a filter element group enclosed in a molded paper bag for the filter section of a cigarette to reduce harmful substances. The filter core is divided into three parts: the ends are regular silk bundle filter sections, and the middle silk bundle filter rod is for impregnating with Gynostemma pentaphylla saponin. This pipe tobacco may be a combination of two of the following: polypropylene silk bundles for cigarettes, acetate filament restraints, or the above-mentioned silk bundles for cigarettes. By applying cigarette silk bundles to this filter section, the content of harmful substances such as phenol, crotonaldehyde, benzopyrene, and nitrosamines in mainstream smoke can be effectively reduced. The reduction range of the toxicity index for seven harmful components varies between 3.02% and 8.27%, which can simultaneously improve the smoking quality and sensory satisfaction of cigarettes during smoking. The improvement range can be summarized in a score of approximately 0.5 to 3 minutes, which can improve the effectiveness of the filter section and the sensory stability of cigarette smoke.

[0016] 4) China Patent No. 204519347, China, August 5, 2015, CHINA TOBACCO FUJIAN IND LLC

[0017] Title of Invention: A two-component composite filter containing nitrosamines unique to tobacco, and a reduction in mainstream cigarette smoke.

[0018] This utility model discloses a composite two-component filter section for tobacco-specific nitrosamines and a method for reducing mainstream cigarette smoke. The composite filter section includes an inner layer of a filter core and layers wound outward in an appropriate order, the filter core being a composite two-component filter core, and the composite two-component filter core including a composite section and an acetate section with spacing to which titanate nanowires combined with material granules are added. Compared to the prior art, this utility model discloses that the filter section adopts a composite two-component structure, uses acetate to separate the composite section, adds titanate nanowires combined with material granules, and when the range of NNK, NNN, NAT, and NAB exceeds 25%, the acetate between segments is used to effectively reduce tobacco-specific nitrosamines and mainstream cigarette smoke, thereby achieving the objective of reducing the harmfulness of cigarettes, maintaining the original taste of cigarettes, and bringing out their quality. The utility model discloses a more robust structure for a composite two-component filter, thanks to the outer core layer of the two-layer filter.

[0019] 5) China Patent No. 104525095, China, December 11, 2014

[0020] SHANGHAI TOBACCO GROUP CO LTD, BEIJING CIGARETTE FACTORY SHANGHAI TOBACCO GROUP CO LTD

[0021] Title of Invention: Magnesium-Aluminum Bimetallic Hydroxide Nanosheet Material for Selectively Reducing Nitrosamines in Cigarette Smoke, Method for Preparing Magnesium-Aluminum Bimetallic Hydroxide Nanosheet Material, and Uses

[0022] The present invention relates to a method for preparing a magnesium-aluminum bimetallic hydroxide nanosheet material for selectively adsorbing specific nitrosamines in cigarette smoke. The preparation method includes the following steps: preparing a mixed aqueous solution of magnesium salt and aluminum salt, and a mixed aqueous solution of sodium hydroxide and sodium carbonate; stirring and mixing the two solutions to obtain a mixed system with a pH of 9 to 10; transferring the mixed solution to a reaction vessel for co-precipitation hydrothermal reaction treatment; cooling, centrifuging, and washing the aqueous solutions of sodium hydroxide and sodium carbonate after the reaction; stirring and mixing both solutions to obtain a mixed system with a pH of 9 to 10; transferring the mixed solution to a reaction vessel for co-precipitation hydrothermal reaction treatment; cooling, centrifuging, and washing until neutral after the reaction; and drying to obtain a magnesium-aluminum bimetallic hydroxide nanosheet material. The preparation method is simple to operate and highly reproducible. The prepared magnesium-aluminum bimetallic hydroxide nanosheet material selectively binds to specific nitrosamines in cigarette smoke, and can be used in small amounts to efficiently reduce harm, thus possessing excellent dissemination and application value.

[0023] 6) China Patent No. 203913370, China, March 11, 201, CHINA TOBACCO FUJIAN IND LLC

[0024] Title of Invention: Double-cell composite filter cylinder capable of reducing nitrosamines in mainstream smoke

[0025] This utility model discloses a kind of double-cell composite filter cylinder that can reduce nitrosamines in mainstream smoke. The filter stick comprises a filter core and a wrapping layer of the filter core. The filter core is a double-cell composite filter core, and the double-cell composite filter core consists of acetate fiber parts and anatase titanium dioxide microsphere particle material segments arranged at intervals. The anatase titanium dioxide microsphere particle material segment is formed by dry particles of anatase titanium dioxide microspheres spreading over a set of cellulose acetate fibers. The filter part provided by this utility model uses a double-cell composite structure, and the anatase titanium dioxide microsphere particle material and the cellulose acetate fiber material are arranged at intervals, so as to selectively reduce the tobacco-specific nitrosamines in the mainstream smoke of cigarette, and the reduction reaches more than 20%, thus reducing the harmfulness of tobacco. Furthermore, the filter part can maintain the original taste and the suction property of the cigarette.

[0026] 7) Chinese Patent No. 203723432, China, February 28, 2014, CHINA TOBACCO FUJIAN IND LLC

[0027] Title of the Invention: Porous Cigarette Filter

[0028] This utility model relates to a porous paper-wrapped tobacco filter comprising a filter element and a coating layer covering the outer peripheral surface of the filter element. The filter element includes at least one fiber material segment and at least one nitrosamine filter segment made of a nitrosamine filter material. In the length direction of the filter, one end of the nitrosamine filter segment is connected to one end of the fiber material segment. In the length direction of the filter, pores are provided at the center of the fiber material segment or the nitrosamine filter segment on one side of the smoke outlet. The porous paper-wrapped tobacco filter has the advantage that it can selectively reduce the tobacco-specific nitrosamines in the mainstream smoke of the cigarette by more than 20%, accordingly reducing the risk of the cigarette and maintaining the original taste and smoking quality of the cigarette.

[0029] 8) International Publication No. WO 2013 / 185464, China, March 11, 2013, CHINA TOBACCO CHUANYU IND CO

[0030] Title of the Invention: Additive for the Filter Tip Portion for Reducing Nitrosamines in Cigarettes and Its Use

[0031] The present invention discloses a filter tip additive for reducing nitrosamines in cigarette smoke, which is a kind of protoporphyrin derivative, and its use. The above filter tip additive is suspended in a solvent at a ratio of 0.05% to 10% of the weight of the carrier, and then sprayed onto the carrier. The carrier added with the above protoporphyrin derivative is added to the tobacco filter rod during tobacco formation to produce a composite filter tip. It is beneficial that the protoporphyrin derivative first proposed in the present invention has a significant effect on reducing the TSNA content in the smoke.

[0032] 9) Chinese Patent No. CN 103190704, China, April 17, 2013, CHINA TOBACCO JIANGSU IND CO, Equivalent to Chinese Patent No. CN 103190704

[0033] Title of Invention: A method for selectively reducing specific nitrosamines in cigarette smoke

[0034] This invention discloses a method for selectively reducing specific nitrosamines in cigarette smoke. The method is used to selectively reduce specific nitrosamines in cigarette smoke using a chitosan-cyclodextrin-glutaraldehyde polymer. The chitosan-cyclodextrin-glutaraldehyde polymer is used as an additive in cigarette filters and is utilized in the manufacture of cigarette filters, resulting in a selective reduction of specific nitrosamines in cigarette smoke when a smoker smokes a cigarette. This method can significantly reduce the release of specific nitrosamine substances such as NNN (N-nitroso-nornicotine), NNK [4-(N-methyl-N-nitrosamine)-1-(3-pyridyl)-butanone], NAT (N-nitroso-anatabine), and NAB (N-nitroso-anabasine) into cigarette smoke. It also has the advantages of a simple addition method for chitosan-cyclodextrin-glutaraldehyde polymer, allowing it to be added during the manufacture of filter sticks, and being easy to operate.

[0035] 10) China Patent No. 103027379, China, January 19, 2013, UNIV FUZHOU;CHINA TOBACCO FUJIAN IND LLC

[0036] Title of Invention: A method for selectively reducing nitrosamines in mainstream cigarette smoke.

[0037] This invention discloses a method for selectively reducing nitrosamines in mainstream cigarette smoke. After mixing TiO2 with an alkaline aqueous solution, the mixture is reacted in a polytetrafluoroethylene container, the product is ion-exchanged with metallic copper, washed, and dried to obtain a load-bearing titanate nanowire additive. The load-bearing titanate nanowire additive is thoroughly mixed with an ethylcellulose ethanol solution, stirred, the mixed solution is dried in a vacuum, pulverized, and then filtered through a 40-60 mesh sieve to prepare the required filter tip additive. A two-component filter tip is then manufactured using a two-component filter tip molding machine. The titanate nanowires are woven in a mesh-like structure, with smaller spacing between the two nanowires. This structure is like a layer of filter screen that can effectively block the passage of harmful substances. Furthermore, a higher level of interaction is obtained due to the presence of many strongly interacting Cu<2+> and nitrosamine groups (-NN=O) on the surface of the ion-exchanged titanate nanowires. The two-component filter tip of a cigarette can be used to significantly reduce four specific types of nitrosamines found in tobacco in mainstream smoke.

[0038] 11) China Patent No. 202603593, China, April 23, 2012, PAN LINHUA

[0039] Title of Invention: Novel Cigarette

[0040] This utility model discloses a novel cigarette. This novel cigarette comprises a cigarette and a filter, the filter being formed of two parts: a sponge-like fibrous body and partially activated carbon particles connected by a thin paper portion, the thin paper containing a tin foil layer, and the partially activated carbon particles being fixed to the central part by the fibrous body of the two parts of the filter. The novel cigarette disclosed by this utility model employs a ternary composite biological filter and utilizes patented molecular sieve technology to absorb carbon monoxide and nitrosamines in the smoke, resulting in a significant reduction of harmful components in the smoke and providing better protection for the throat, lungs, and internal environment of the human body.

[0041] 12) China Patent No. 102813279, China, August 30, 2012, CHINA TOBACCO JIANGSU IND CO

[0042] Title of Invention: A method for efficiently reducing specific nitrosamines in cigarette smoke.

[0043] This invention discloses a method for efficiently reducing specific nitrosamines in cigarette smoke. The β-carotene / β-cyclodextrin inclusion complex is added during the preparation of the base material for cigarette filters, homogeneous filter sticks for cigarette filters, or two- or three-component composite filter sticks. The β-carotene / β-cyclodextrin inclusion complex selectively binds specific nitrosamines during smoking. Therefore, efficient damage reduction is achieved. A method for efficiently reducing specific nitrosamines in cigarette smoke can significantly reduce the release of specific tobacco nitrosamines in cigarette smoke, such as NNN (N'-nitrosonornicotine), NNK (nicotine-derived nitrosamine ketone), NAT (N'-nitroso-anatabine), and NAB (N'-nitrosoanabasine). The low amount of β-carotene / β-cyclodextrin inclusion complex added helps improve the aroma of cigarettes, it is highly feasible in actual manufacturing and application, the addition of β-carotene / β-cyclodextrin inclusion complex is simple, and it can be added in the manufacture of filters, making it easy to operate and highly practical.

[0044] 13) China Patent No. 102599651, China, December 13, 2010, CHINA TOBACCO HEBEI IND CORP;UNIV HEBEI;BEIJING ZHONGJI HUIMIN TECHNOLOGY DEV CO LTD

[0045] Title of Invention: Method for preparing a composite cigarette filter stick that can reduce harmful components in cigarettes.

[0046] The present invention discloses a method for preparing a composite cigarette filter stick that can reduce harmful components in cigarettes. The preparation method includes the following steps: supplying crushed Na+ or H+ type polypropylene particles to a glycerol triacetate having sieve holes to prepare a turbidity with a weight percent concentration in the range of 5% to 20%; uniformly spraying the turbidity onto a cellulose acetate cigarette toss; winding up the cellulose acetate cigarette toss to form a supply filter stick that is connected to a cigarette in a winding manner; and preparing a composite cigarette filter stick by combining the supply filter stick and the wound cellulose acetate cigarette toss in a length ratio of 2:1 to 1:1. The hot-air-dried cigarette smoke contains harmful substances such as NNK (nitrosamine), benzo[a]pyrene, phenol, crotonaldehyde, and HCN (hydrogen cyanide), which can be reduced simultaneously to varying degrees in a single stage. This allows for a simultaneous reduction of 17.11% of NNK, 11.43% of benzo[a]pyrene, 25.79% of crotonaldehyde, 61.80% of phenol, and 29.97% of hydrogen cyanide in a single stage. Cigarettes with this composite cigarette filter stick produce less odor and have a superior aroma compared to cigarettes with a conventional cigarette filter.

[0047] 14) China Patent No. 102553543, China, February 20, 2012, FENGSHUN COUNTY YANGXIKENG ECOLOGICAL AGRICULTURE TECHNOLOGU CO LTD

[0048] Title of Invention: Adsorbent material for cigarette filter tip and method for preparing the same

[0049] This invention discloses an adsorbent material for cigarette filter tips and a method for preparing the same. The adsorbent material has a porous structure and is processed by pickling, drying, crushing, and granulating the inner layer of pomelo peel. The adsorbent material can effectively filter out tar, nitrosamines, benzopyrene, and other harmful substances generated during the combustion of cigarettes, thereby protecting the health of smokers, eliminating off-flavors and unpleasant odors as cigarette smoke passes through, improving the smoking experience and the quality of the cigarettes, and has good processability, making it advantageous for the manufacture of cigarette filter tips using the material.

[0050] Russian Patent No. 2009125621, Russia, November 26, 2007, British American Tobacco, Equivalent: Argentine Patent Application Publication No. 063873, Australian Patent Application Publication No. 2007329060, Australian Patent No. 2007329060, Brazilian Patent Application Publication No. 0720149, Brazilian Patent No. 0720149, Brazilian Patent No. 0720149, Canadian Patent Application Publication No. 2670927, Canadian Patent No. 2670927, Chilean Patent Application Publication No. 2007003 Patent No. 473, Chinese Patent Application Publication No. 101547617, Chinese Patent No. 101547617, Danish Patent No. 2094119, European Patent Application Publication No. 2094119, European Patent No. 2094119, Spanish Patent No. 2573933, Hungarian Patent No. 029119, JP 2010511395, Japanese Patent No. 5313913, Korean Patent No. 101426975, Korean Patent Application Publication No. 20090098861, Mexican Patent Application Publication No. 2009005999, Mexican Patent No. 289922, Polish Patent No. 2094119, Portuguese Patent No. 2094119, Russian Patent No. 2504307, Taiwanese Patent Application Publication No. 200838444, Taiwanese Patent No. I421037, Ukrainian Patent No. 98477, US Patent Application Publication No. 2011041859 U.S. Patent Publication No. 2013139835, U.S. Patent Publication No. 2014155555, U.S. Patent Publication No. 2015038648, U.S. Patent No. 8733369, U.S. Patent No. 8889795, U.S. Patent No. 9169341, U.S. Patent No. 9265283, International Publication No. 2008068153, International Publication No. 2008068153, South African Patent No. 200903459

[0051] Title of Invention: Selective Molecular Impression Print Polymer for Tobacco-Specific Nitrosamines and Method of Application Thereof

[0052] The present invention relates to a selective molecular imprint polymer for at least one tobacco-specific nitrosamine (TSNA), the polymer being obtained using a material comprising a monomer containing a neutral functional group selected from the group including TSNA or its structural analogues, 2-hydroxyethyl methacrylate (HEMA), acrylamide, methacrylamide, glycerol monoacrylate and glycerol monomethacrylate, and a hydrophobic networking agent. The present invention also describes a method for producing molecular imprint polymers, smoking articles, tobacco smoke filters, and kits for the detection, quantification, and separation of nitrosamines contained in a sample, including the molecular imprint polymer, a method for reducing the content of at least one TSNA in tobacco products, and a method for producing tobacco material. Effect: To obtain a molecular imprint polymer selective for compounds containing nitrite groups.

[0053] China Patent No. 102511928, China, January 4, 2012, CHINA TOBACCO ANHUI IND CO LTD

[0054] Title of Invention: Filter tip capable of reducing the release of harmful components from mainstream cigarette smoke

[0055] This invention relates to a filter tip that can reduce the amount of harmful components released from mainstream smoke of cigarettes. The filter tip contains a titanium dioxide nanotube additive, with the additive content in each filter tip being 10 to 30 mg, and the pore size of the titanium dioxide nanotube being in the range of 1.5 to 30 nm. The titanium dioxide nanotube additive is a compound of one or more of the following in any ratio: titanium dioxide nanotube, cuprous oxide-coated titanium dioxide nanotube, iron oxide-doped titanium dioxide nanotube, aluminum-doped titanium dioxide nanotube, zirconium-doped titanium dioxide nanotube, and boron-doped titanium dioxide nanotube. By employing this filter tip, the amount of harmful components released from mainstream smoke, including hydrocyanic acid, benzopyrene, phenol, crotonaldehyde, ammonia, and NNK (nitrosamine), can be reduced by more than 30%.

[0056] Chinese Patent No. 201888247, China, December 13, 2010, CHINA TOBACCO HEBEI IND CORP; UNIV HEBEI; BEIJING ZHONGJI HUIMIN TECHNOLOGY DEV CO LTD, no translation available.

[0057] Title of Invention: Composite cigarette filter stick capable of simultaneously reducing harmful components in cigarettes

[0058] This utility model discloses a composite cigarette filter stick that can simultaneously reduce harmful components in cigarettes, comprising a filter element and a wrapping layer wrapped around the outside of the filter element, wherein the filter element employs cellulose acetate tow or mekralon tow, and at least 1 / 3 to 1 / 2 of the length of each cellulose acetate tow or mekralon tow surface is coated with a mesh-like polypropylene particle layer. The micropores and openings on the surface of the cauliflower-like functional polymer material coated on the surface of the composite cigarette filter stick, i.e., the mesh-like polypropylene particle layer, form a mesh with a large specific surface area, and Na<+> or H<+> is scattered on the surface. As a result, the mesh-like polypropylene particle layer has physical and chemical adsorption capabilities and can simultaneously reduce nicotine-derived nitrosamine ketones (NNK), benzo[a]pyrene, phenol, crotonaldehyde, hydrocyanic acid (HCN), and other harmful substances in the smoke of dry cigarettes to varying degrees. Compared to sensory evaluation of cigarettes using a standard cigarette filter tip, no odor is produced, the aftertaste is improved, and the aroma of the cigarette is richer and milder. This test achieves the objective of simultaneously reducing NNK, benzo[a]pyrene, phenol, crotonaldehyde, and HCN in cigarette smoke to different degrees.

[0059] 18) China Patent No. 201781972, China, December 13, 2010, CHINA TOBACCO HEBEI IND CORP; UNIV HEBEI; BEIJING ZHONGJI HUIMIN TECHNOLOGY DEV CO LTD, no translation available.

[0060] Title of Invention: Composite Filter Stick with Nanometer-Sized Material It is the same as the previous one, but the title of the invention is different.

[0061] 19) Chinese Patent No. 201523665, May 11, 2009, JINTAO DENG, no translation available.

[0062] Title of Invention: Cigarette Holder with Dual Filtering Function

[0063] This utility model provides a cigarette holder having a dual filtering function in the field of filtering tips. The filter within the cigarette holder includes a hollow filtering sleeve and a filtering tube, with small pores arranged in the wall of the filtering tube and an air outlet hole arranged in the outer wall of the filtering sleeve, and an annular projection block formed at one end of the filtering tube located inside the filtering sleeve, the diameter of which is greater than the inner diameter of the sleeve opening of the filtering sleeve and less than the diameter of the inner wall of the filtering sleeve, the annular projection block is gap-fitted with the inner wall of the filtering sleeve, the filtering tube is flexibly sleeve-connected to the lumen of the filtering sleeve to form a tensile-flexible connection, a smoke passage is formed inside the filtering sleeve, the front end of the intermediate sleeve is connected to the rear end of a secondary filtering device, and the front end of the secondary filtering device is connected to the mouthpiece. The cigarette holder can further filter harmful substances in cigarette smoke, particularly most carcinogenic substances including tar and nitrosamines, thereby minimizing the health damage to smokers caused by burning cigarette smoke and addressing smoking addiction without affecting the smoker themselves.

[0064] 20) Chinese Patent No. 201409454, May 11, 2009, JINTAO DENG, no translation available.

[0065] Same as the previous one.

[0066] 21) Eurasian Patent No. 200602044 (European Patent No. 1756023), Eurasian Patent Office, May 24, 2005, British American Tobacco

[0067] Equivalents:

[0068] Austrian Patent No. 553074, Australian Patent Application Publication No. 2005244726, Australian Patent No. 2005244726, Brazilian Patent Application Publication No. 0511416, Brazilian Patent No. 0511416, Brazilian Patent No. 0511416, Canadian Patent Application Publication No. 2565129, Canadian Patent No. 2565129, Chinese Patent Application Publication No. 1972884, Chinese Patent No. 1972884, Eurasian Patent No. 014824, European Patent Application Publication No. 1756023, European Patent No. 1756023, Spanish Patent No. 2384260, JP 2008500442, Japanese Patent No. 5468736, Korean Patent No. 1012769 Patent No. 88, Korean Patent No. 101505333(B1), Korean Patent No. 101556872(B1), Korean Patent Application Publication No. 20070033356, Korean Patent Application Publication No. 20130036360, Korean Patent Application Publication No. 20140108600, Mexican Patent Application Publication No. PA06013628, Polish Patent Application Publication No. 1756023, Ukrainian Patent No. 88469, US Patent Application Publication No. 2007186940, US Patent Application Publication No. 2014332015, US Patent No. 8807142, US Patent No. 9844230, International Publication No. 2005112670, International Publication No. 2005112670, South African Patent No. 200609378

[0069] Title of Invention: Nitrosamine-Selective Molecular Imprinted Polymer, Method for Producing the Same (Modified Method), Kit, Smoking Article, Filter Containing the Polymer, and Method for Using the Polymer

[0070] A molecularly imprinted polymer derived from at least one functional polymer containing an acid-selective functional group for at least one specific tobacco nitrosamine compound, wherein the polymer has a molecularly specific imprint matrix for tobacco nitrosamine or its functional or structural analogues. The present invention also describes variations of methods for producing such polymers, as well as kits containing the polymers, smoking articles and smoke filters, and methods for using the polymers.

[0071] 22) Chinese Patent No. 101433818, China, December 4, 2008, Univ. Nanjing, No translation or equivalent.

[0072] Title of Invention: Novel Mesoporous Material for Absorbing Granular Phase Substances, Coctal, Phenol, and Nitrite Amines in Mainstream Tobacco Flue Gas

[0073] This invention discloses a novel mesoporous material for adsorbing tar, phenol, and specific nitrosamines in mainstream tobacco smoke. The mesoporous material, with its high adsorption properties, is used as an additive in the filter tips of cigarettes. The mesoporous material is either a mesoporous molecular sieve having a three-dimensional mesh microstructure and integrated appearance, such as SBA-15, or an SBA-15 mesoporous molecular sieve material having a three-dimensional mesh microstructure and integrated appearance, plated with a liquid film, or modified with a metal oxide such as zirconia. This invention develops an SBA-15 mesoporous molecular sieve material having a three-dimensional mesh microstructure and integrated appearance, employing a more convenient and effective method for modifying the surface / surface layer. It possesses excellent performance in blocking particulate matter and environmental toxins such as phenol in smoke, saves energy and time during preparation, reduces environmental pollution, and can also reduce costs, resulting in significant economic and social benefits.

[0074] 23) China Patent No. 101019692, China, March 22, 2007, He Jinxing

[0075] Title of Invention: Filter Rod and Filter Tip Using Mixed Activated Carbon Fibers

[0076] The filter rods and filter tips are made from cellulose acetate and uniformly mixed activated carbon fibers in an amount of 1 to 10% by weight of cellulose acetate. Adding activated carbon fibers with nanometer-sized pores significantly improves the adsorption performance of the filter rods and filter tips, drastically reducing volatile harmful substances such as nitrosamines, benzopyrene, CO, and tar in the main flue stream, while not significantly increasing suction resistance. Furthermore, filter rods and filter tips with mixed activated carbon fibers possess a certain degree of anti-counterfeiting functionality.

[0077] 24) Chinese Patent No. 101053446, China, March 1, 2007, Univ. Nanjing, no translation available.

[0078] Title of Invention: Novel Mesoporous Material for Absorbing Nitrosamines in Mainstream Tobacco Flue Gas

[0079] This invention discloses a novel mesoporous material used for adsorbing nitrosamines in mainstream tobacco flue gas. The mesoporous material, with its high adsorption capacity, is used as an additive material for cigarette filter tips. The mesoporous material is prepared by spreading a highly viscous, non-volatile liquid film compound on the inner and outer surfaces of a mesoporous molecular screen, or the mesoporous material is a mesoporous molecular screen containing template micelles. This invention provides a simpler and more effective method for surface / surface layer modification of mesoporous molecular screen materials, significantly increasing their ability to absorb nitrite amines in smoke, resulting in energy savings, time savings, reduced environmental pollution, and cost savings. Therefore, it offers clear economic and social benefits.

[0080] 25) China Patent No. 1879511, China, June 13, 2005, HEFEI INST PHYSICAL SCI CAS

[0081] Title of Invention: Addictive Tip Material for Reducing Tobacco-Specific Nitrosamines in Cigarette Smoke and Method for Preparing the Same

[0082] This invention discloses an addictive mouthpiece stick for reducing nitrite amines specific to flue gas, and a method for preparing the same. The addictive substance comprises a granular molecular screen with a particle size of 150 to 500 micrometers, a noble metal or oxide compound with a particle size of 1 to 50 nm uniformly distributed on the molecular screen, and a rare earth metal or its oxide compound. This method includes the following steps: (1) preparing granular molecular screens having a size of 150 to 500 micrometers; (2) immersing the molecular screens in a rare earth metal solution for 8 to 24 hours, washing them, drying them at 50 to 80°C for 3 to 6 hours, and treating them at 120 to 200°C for 2 to 5 hours; and (3) immersing the molecular screens in a precious metal solution for 8 to 24 hours, drying them at 50 to 80°C for 3 to 6 hours, treating them at 120 to 200°C for 2 to 5 hours, and treating them at 230 to 300°C for 3 to 6 hours to obtain the addictive mouthpiece stick.

[0083] 26) China Patent No. 1582797, China, June 5, 2004, WUHU CIGARETTE FACTORY

[0084] Title of Invention: Detoxification Additive for Filter Tips

[0085] Detoxification additives for cigarette tip filters, used to reduce the content of tar, Co, and nitrosamines in tobacco smoke, are prepared by extracting their active ingredients in liquid form from tea leaves, hawthorn, Phyllanthus genus, Emblica, and myrobalan, then concentrating and drying them to obtain particles.

[0086] 27) Chinese Patent No. 1582796, China, June 15, 2004, Univ. Nanjing, no translation. Equivalent: Chinese Patent No. 1268240

[0087] Title of Invention: Filter Tip and Fillment Additive for Reducing Nitrosamines in Cigarette Smoke

[0088] A cigarette tip filter for reducing the nitrosamine content in cigarette smoke is characterized by containing a tow additive in liquid form, which includes a polyglucoside compound, an organic acid, an inorganic acid, an auxiliary agent, and water.

[0089] 28) Chinese Patent No. 1375245, China, June 15, 2004, Univ. Nanjing, no translation. Equivalent: Chinese Patent No. 1167364

[0090] Title of Invention: Additive for cigarette combustion assistance and harm reduction having nanopores

[0091] The cigarette additive for reducing the nitrosamine content in cigarette smoke and aiding the combustion of cigarettes is a type of multi-hole atom, such as zeolite KA, suspended in a colloidal solution. In particular, it is suitable to use micron 3A zeolite, a multi-hole material containing potassium ions, with a particle size of 2-5 μm and a pore size of approximately 0.3 nanometers. The additive of the present invention can be sprayed onto cigarette scrap in an amount of 0.5-10% of the weight of the cigarette scrap and dried in air to manufacture cigarettes. The burning time of cigarettes in passive and inhalation combustion can be reduced by 5-12% and 20-26%, respectively, and subsequently, the nitrosamine content in the smoke can be reduced by 23-33% and 43-63%, respectively, to significantly reduce environmental pollution caused by smoking.

[0092] 29) International Publication No. 2014059101 (Uruguayan Patent No. 35074) (Celanese Acetate, 2014). This patent was abandoned in Europe, presumably because a preceding International Publication No. 2012051548 (Celanese Acetate, 2012) was found, which is substantially the same. Either of the two, i.e., the abandoned one or its inhibiting prior art, can be considered the nearest prior art.

[0093] Title of Invention: Apparatus, System, and Related Method for Forming a Porous Body for a Smoke Filter

[0094] The present invention may include supplying a matrix material containing binder particles and active particles into a mold cavity via a pneumatic high-density phase supply to form a desired cross-sectional shape; heating at least a portion of the matrix material to bond the matrix material at multiple contact points, thereby forming a long porous body; cooling the long porous body; and cutting the long porous body radially, thereby producing a porous body. In some examples, the matrix material may include a plurality of active particles, a plurality of binder particles (optionally having hydrophilic surface modifications), and optionally microwave-enhancing additives.

[0095] However, while this application and International Publication No. 2014059101 manufacture very similar external filters, '101 is based on a method that focuses purely on something mechanically structural with respect to the physical assembly of the filter, and is therefore described in the claims, whereas this application is based on the manufacture of the composite material from a chemical and physicochemical standpoint, and its performance. Considering the functionality in these embodiments, there are significant differences in scope and range compared to the patent filter '101, and the much more sophisticated composite material reaches a level of hygiene that results in a significant reduction of several Hoffmann toxic compounds. This is achieved by introducing adsorbents involving molecular interactions of various properties into the composite material. These agents required extensive prior investigation of their efficiency in this medium (the medium of cigarette smoke), and it was also necessary to define the particle size distribution and appropriate relative proportions to prevent incompatibility that would lead to the structural collapse of the porous material constituting the composite material.

[0096] Conclusions regarding the latest technology

[0097] The international background survey is non-exclusive and based on the IPC A24D classification: FILTERS; mouthpieces for cigars or cigarettes; manufacture of tobacco smoke filters or mouthpieces.

[0098] As described above, none of the background findings preclude the patent for the novel filter article of the present invention. [Brief explanation of the drawing]

[0099] [Figure 1] This figure shows the degree of filtration compared to internationally standardized cigarettes.

[0100] [Figure 2] This is a diagram showing sintered GUR. SEM (Scanning Electron Microscopy) image.

[0101] [Figure 3] This figure shows sintered GUR containing adsorbent material. SEM image.

[0102] [Figure 4] This figure shows the hexagonal crystal structure of graphene and its derived allotropes.

[0103] [Figure 5] This is a diagram showing a hybrid of two planar triangles sp².

[0104] [Figure 6] This figure shows the bonding between aromatic molecules via the Hunter-Sanders mechanism (J.Am.Chem.Soc.1980, 112, 5525~3534).

[0105] [Figure 7] This figure shows the structure and dimensions of NNN and NNK.

[0106] [Figure 8] This figure shows the production of NNK during the curing of Burley tobacco.

[0107] [Figure 9] This figure shows molecular sieves of types A and X.

[0108] [Figure 10]This figure shows different alternatives for maintaining NNN depending on the pore size of the zeolite.

[0109] [Figure 11a] This is a diagram showing the fibrous structure of SBA-15.

[0110] [Figure 11b] This is a diagram showing the internal texture of a DMF block.

[0111] [Figure 12] This figure shows an example of an apparatus for continuously producing DMF.

[0112] [Figure 13] This figure shows the application of DMF to conventional combustible cigarettes.

[0113] [Figure 14] This figure shows the application of DMF to the HNB vape device and details of the mouthpiece.

[0114] [Figure 15] This figure shows the carbonyl level in μg units per smoking unit ("stick" or cigarette).

[0115] [Figure 16] This figure shows the percentage decrease in carbonyl present in the aerosol of the "stick" before and after applying DMF. [Modes for carrying out the invention]

[0116] Support or "binder".

[0117] The structural support or "binder" of the MFD of the present invention as used herein is, for example, high molecular weight polyethylene with a molecular weight of 300,000 g / mol to approximately 2,000,000 g / mol, an average particle size of 300 to 1500 microns, and an apparent density of 0.25 g / ml to 0.50 g / ml. This material, registered under the trademark GUR by Ticona GmbH, undergoes sintering, and at high temperatures but below its melting point, its particles coalesce without flowing. Atomic diffusion occurs at the contact points between particles, and the particles remain chemically bonded, creating the porous structure shown in Figure 1. In this porous structure, as shown in Figure 2, the adsorbent particles contained in the porous body are bonded to each other. In this case, the bond with GUR may be chemical or simply mechanical, depending on the chemical properties of the adsorbent particles in contact. To optimize the operational efficiency of GUR, its extreme hydrophobicity must be overcome. In fact, the adsorbent particles used in porous bodies are usually inherently hydrophilic, which hinders the interaction between the GUR particles and the adsorbent particles. This solution is achieved by hydrophilic functionalization of the GUR surface using oxygenated functional groups (carboxyl, hydroxyl, epoxy, etc.). This transformation generates van der Waals-like interactions, hydrogen bridging, electrostatic interactions, etc., and thus reduces the tendency of porous materials to collapse. The most suitable technique for achieving this transformation is plasma treatment of GUR. It should be noted that this treatment only modifies the surface of the treated object without affecting other properties, but it can certainly improve the tribological properties (friction, abrasion) of porous materials when they are subjected to sliding in, for example, a continuous manufacturing process. It should also be noted that this highly porous structure of GUR makes it possible to obtain absorbent loadings that cannot be achieved on other supports.

[0118] Adsorbent

[0119] 1. Activated carbon. This is one of the oldest and most traditional adsorbents. Its textured properties give it great versatility in applications. These include its carbonyl retention capacity, which, when combined with the high porosity resulting from the sintering of GUR and the resulting high loading level, has made it possible to achieve a reduction of more than 80% of carbonyl in tobacco smoke. These reduction levels are not available in other systems based on activated carbon on other classic supports such as cellulose acetate. The inventors highlight this feature as another novel aspect of the invention: the high packing capacity of the adsorbent, which does not significantly affect the pressure drop of the system when applied to a smoking system, thanks to the high porosity of the support. The inventors' desired values ​​for some activated carbon specifications in porous materials are as follows:

[0120] Total ash content: 4%~6%

[0121] Apparent density: 460g / l~540g / l

[0122] BET area: 1000m2 / g=1200m2 / g

[0123] pH: 9.0~11.0

[0124] Ingredients: Steam-activated coconut shells

[0125] Granules: 30 US mesh x 70 US mesh

[0126] 2. Graphene. This belongs to a new generation of carbonaceous adsorbents, which are the unit blocks of other allotropic forms such as nanotubes, fullerenes, nanofibers, and nanocones. These new forms have a relatively large surface area, operate at the nanoscale, and exhibit novel chemical and electronic properties that create countless new applications. Graphene is composed of hybrid sp² arranged in a hexagonal crystal structure. 2 It is presented as a two-dimensional monolayer of carbon atoms having (Figure 3). Figure 4 shows a planar triangular hybrid sp between two carbon atoms. 2This is described electronically. The remaining two π electrons form a π bond, providing further stability to the sigma bond (σ) between carbon atoms. Here, generalizing this mechanism to a graphene hexagon, it can be visualized as a plane of a sigma junction (σ) with a cloud of conjugated π electrons. These π electrons contribute to giving graphene special mechanical, electrical, and chemical properties. For example, such π electrons can generate bonds with other molecules having aromatic rings similar to those of graphene (e.g., polycyclic aromatic hydrocarbons) through mechanisms such as those proposed by Hunter and Sanders[1] outlined in Figure 5, which assign special importance to the σ-π (sigma-pi) attraction. These overcome the π-π (pi-pi) repulsion with maximum strength and thus stabilize the system, which is the underlying mechanism of our porous materials for holding polycyclic aromatic hydrocarbons by the action of graphene. The graphene used in the porous materials of the present invention is graphene obtained by exfoliating graphite. As is known, graphite is formed by the superposition of a vast number of layers of graphene held together by weak van der Waals forces that facilitate delamination. The final form of introducing graphene into a porous mixture is nanoparticles with a diameter of approximately 15 microns, with a graphene thickness of 5-15 Nm and a surface area of ​​120-150 m². 2 It is / g.

[0127] 3. Zeolite and other molecular sieves. Among the most toxic components of tobacco smoke are nitrosamines: chemical compounds characterized by having an N-nitrite group (N-NO) in their molecule. This family includes volatile and non-volatile nitrosamines, the latter of which include the following four tobacco-specific nitrosamines (TSNAs).

[0128] N'-Nitrosonornicotine (NNN)

[0129] 4-Methylnitrosamine-1-(3-pyridyl)-1-butanone (NNK)

[0130] N'-nitrosoanatabine (NAT), and

[0131] N'-nitrosoanabasin (NAB).

[0132] The most important are NNN and NNK, whose structures and dimensions are shown in Figure 6. TSNA is mainly produced during the curing of Burley tobacco in drying sheds, as outlined in Figure 7. Zeolites are typically used to remove or reduce nitrosamine content in smoke. These constitute a class of aluminosilicates characterized by having a regular microporous structure (pores <2 nm). The corresponding crystalline structures are formed by tetrahedra of (AlO4) and (SiO). These tetrahedra constitute the basic building blocks of various zeolite structures, with types A and X, shown in Figure 8, being the most commercially used. Adsorption and decomposition of nitrosamines by zeolites are two efficient strategies for eliminating environmental carcinogens resulting from the special selectivity of zeolites. Two determinants governing the selective adsorption of nitrosamines are the electrostatic field within the channel and the pore size. The first guides the nitrosamine molecule by completely or partially inserting, for example, through NO polar groups, while the second conditions the shape that allows the carcinogen to be retained. Each tetrahedron [ALO4] - is a cation (H + kaNa + , K +It should be noted that this results in a negative charge to the structure, which is compensated for by (etc.). An efficient way to improve zeolite performance is to introduce a metal into its structure. In the case of our porous material, the metal is exchanged for hydrogen or sodium in the original zeolite, which contributes to promoting attraction to NO. For this “cupric zeolite,” we assign the formula Cu-ZSM-5, following the notation widely used in heterogeneous catalytic systems as mentioned. Our MFD zeolites can exhibit efficient activity against volatile nitrosamines, but it should be noted that for several reasons, namely, a) the pores of zeolites with a diameter of less than 2 nm (micropores) are smaller in size than the molecules of TSNA groups, but they can be held by the fixation of the groups rather than by the electrostatic force in the zeolite channels (Figure 9), and b) it is difficult to hold those of the TSNA group because the important fraction of nitrosamines moves to the fumes bound to its particle phase by weak dispersion forces. To complement the activity of Cu-ZSM-5, mesoporous compounds such as SBA-15 or MCM-41 can be included in the DMF, which extends the porosity range and adsorption capacity of the system as follows: [Table 0]

[0133] From these two macroporous silicates (pore size > 2 nm), the inventors selected SBA-15 for incorporation into the porous material for two reasons: its larger pore diameter and volume, and its fibrous nature (Figure 10a). This last feature allows nitrosamine molecules to adhere to the smoke stream as it passes through the disordered texture of the porous material (Figure 10b), helping to retain smoke particles distributed in diameters from 100 nm to 1000 nm.

[0134] Composition and preparation of MFD

[0135] High-efficiency MFDs can be prepared by including an adsorbent complex within the following compositional ranges: activated carbon (55%~65%), GUR (25%~35%), graphene (3%~1%), CuZSM-5 (3%~6%), and SBA-15 (3%~6%). These components are sequentially mixed with each other by a procedure that ensures the most complete mixing possible. To overcome non-uniformity mainly due to differences in density between the mixed materials, the inventors propose the use of a Turbula-type mixer. The mixture thus obtained is loaded into a system to be molded according to its application. Considering preferred applications in the tobacco industry, one of the most common shapes is cylindrical for suitability as a nozzle for combustible cigarettes. In such cases, the mold is a cylindrical steel tube, and a non-limiting scheme of the apparatus for forming the MFD is shown in Figure 11. To sinter the GUR, the tube is heated to 200°C for 20 minutes. A continuous manufacturing system can be achieved by adjusting the speed at which the mixture passes through the heated tube and the length of the tube, in which case an adjustable-length cutter can be placed at the end of the tube.

[0136] Examples of MPM applications in the tobacco industry

[0137] Application to conventional combustible cigarettes

[0138] To incorporate an MFD into a conventional combustible cigarette, a design like that shown in Figure 12 can be used, in which case the MFD is connected at one end to the tobacco column and at the other end to a sector, usually composed of cellulose acetate fibers, thus forming an additional non-selective filter, which is unnecessary for normal MFD operation. However, the cellulose acetate fibers satisfy aesthetic purposes by concealing the black and rough-touch parts of the MFD. They also serve a useful function when the purpose is to introduce airflow into the cigarette through circular perforations on its surface, or when the purpose is to introduce an aromatic capsule inside. Cigarette smoking can be performed using a Cerulean SM450 or similar smoking machine according to the Health Canada Intensive regimen, while simultaneously smoking a reference cigarette, University of Kentucky 1R6F, on a separate channel of the same machine. Extracts are analyzed according to the official analytical method C0RESTA or Health Canada. The difference in content between two cigarettes for each component analyzed allows us to understand the reduction that occurs relative to the concentration in a reference cigarette, which is representative of a typical composition of combustible cigarettes internationally. Table I shows the degree of reduction of toxic compounds achieved in MFD in cigarettes corresponding to the scheme in Figure 12, which has the tobacco blend characteristics of "American Blend," the most common type of combustible cigarette internationally.

[0139] Application to new generation cigarettes (HNBs) that heat up but do not burn.

[0140] In these cigarettes or "sticks," instead of combustion, the tobacco is heated to a maximum temperature of 350°C, thereby reducing the content of many toxic compounds produced by the combustion process by approximately 80% to over 90% in the released aerosol. However, residues of such compounds, particularly carbonyls, remain in this aerosol, and their precursors begin to decompose at temperatures above 200°C. Some of these carbonyls are highly irritating or carcinogenic (e.g., acetaldehyde, formaldehyde, butanaldehyde). The aforementioned residues can be further reduced by applying MFD as shown in Figure 13, but are not limited to, and are applicable to one of the internationally expanding HNB smoking devices, the "stick." The graph in Figure 14 compares the carbonyl levels of the "stick" with and without MFD, as well as a standard reference cigarette, in this case 3R4F, on a logarithmic scale and in units of μg / "stick." The percentage reduction in residual carbonyl achieved by MFD is shown in Figure 15.

[0141] The following table (Table 1) shows the astonishing and unprecedented reduction of the Hoffmann compound according to the present invention. [Table 1]

[0142] Figure 1 shows the degree of filtration more clearly on a logarithmic scale compared to internationally standardized cigarettes. [Prior art documents] [Patent Documents]

[0143] [Patent Document 1] International Publication No. 2012 / 054111 [Patent Document 2] Chinese Patent Application Publication No. 106036999 [Patent Document 3] Chinese Patent Application Publication No. 106072761 [Patent Document 4] Chinese Utility Model Application No. 205512329 [Patent Document 5] Chinese Patent No. 204519347 [Patent Document 6] Chinese Patent No. 104525095 [Patent Document 7] Chinese Patent No. 203913370 [Patent Document 8] Chinese Patent No. 203723432 [Patent Document 9] International Publication No. 2013185464 [Patent Document 10] Chinese Patent No. 103190704 [Patent Document 11] Chinese Patent No. 103027379 [Patent Document 12] Chinese Patent No. 202603593 [Patent Document 13] Chinese Patent No. 102813279 [Patent Document 14] Chinese Patent No. 102599651 [Patent Document 15] Chinese Patent No. 102553543 [Patent Document 16] Russian Patent No. 2009125621 [Patent Document 17] Chinese Patent No. 102511928 [Patent Document 18] Chinese Patent No. 201888247 [Patent Document 19] Chinese Patent No. 201888247 [Patent Document 20] China Patent No. 201781972 [Patent Document 21] Chinese Patent No. 201523665 [Patent Document 22] China Patent No. 201409454 [Patent Document 23] Austrian Patent No. 553074 [Patent Document 24] Chinese Patent No. 101433818 [Patent Document 25] Chinese Patent No. 101019692 [Patent Document 26] Chinese Patent No. 101053446 [Patent Document 27] Chinese Patent No. 1879511 [Patent Document 28] Chinese Patent No. 1582797 [Patent Document 29] Chinese Patent No. 1582796 [Patent Document 30] Chinese Patent No. 1375245 [Patent Document 31] International Publication No. 2014059101 (Uruguayan Patent No. 35074)

Claims

1. A multi-adsorption filter device capable of selectively and simultaneously reducing or removing the content of toxic compounds belonging to at least four groups of Hoffmann compounds in a gaseous medium comprising a macroporous polymer structure filter portion and a cellulose acetate portion, wherein the macroporous polymer structure filter portion is a very high molecular weight polyethylene acting as a support and binder for the adsorbent, in the following proportions: a) GUR binder is 25% to 35%, b) Activated carbon is 55-65%, c) Graphene is 3-10%, d) 3-10% copper zeolite, e) Characterized by having 3-6% SBA15, A multi-adsorption filter device in which the adsorbent is specifically selected and quantified to selectively retain at least one component of each of the following Hoffmann chemical groups: carbonyl and volatile organic compounds, polycyclic aromatic hydrocarbons, and nitrosamines derived from smoke or tobacco product aerosols.

2. A method for preparing a macroporous polymer structure filter portion, characterized by completely mixing the components described in claim 1 in such proportions; heating the mixture to 180°C to 250°C for 25 to 35 minutes in a mold of a shape suitable for the application to be carried out, preferably a hollow cylinder; extruding the mixture through the heated metal cylinder with a holding time of about 25 to 35 minutes for sintering; and then dividing the extruded material into the dimensions necessary for being incorporated into a cigarette between the tobacco column and the acetate filter portion, which is preferably delivered to the consumer.

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