WO2009129255A2 - Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product - Google Patents
Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product Download PDFInfo
- Publication number
- WO2009129255A2 WO2009129255A2 PCT/US2009/040550 US2009040550W WO2009129255A2 WO 2009129255 A2 WO2009129255 A2 WO 2009129255A2 US 2009040550 W US2009040550 W US 2009040550W WO 2009129255 A2 WO2009129255 A2 WO 2009129255A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tobacco product
- nanocrystalline particles
- tobacco
- nanocrystalline
- metals
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
- A24B15/241—Extraction of specific substances
- A24B15/245—Nitrosamines
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
- A24B15/241—Extraction of specific substances
- A24B15/246—Polycyclic aromatic compounds
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/285—Treatment of tobacco products or tobacco substitutes by chemical substances characterised by structural features, e.g. particle shape or size
- A24B15/286—Nanoparticles
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/287—Treatment of tobacco products or tobacco substitutes by chemical substances by inorganic substances only
Definitions
- the present invention is generally directed toward abatement of hazardous, or otherwise undesired compounds contained in tobacco smoke through neutralization, adsorption, and absorption by the incorporation of nanocrystalline particles into tobacco products.
- tobacco smoke especially that produced by cigarettes and cigars, contains at least 250 poisonous gases, chemicals, and metals including hydrogen cyanide, carbon monoxide, butane, ammonia, toluene, arsenic, lead, chromium, cadmium, and polonium-210 (highly radioactive carcinogen), nitrogen oxides, formaldehyde, acrolien, benzene, certain N-nitrosamines, nicotine, phenol, polyaromatic hydrocarbons (PAHs). Eleven of the compounds are classified as Group 1 carcinogens, the most dangerous.
- poisonous gases, chemicals, and metals including hydrogen cyanide, carbon monoxide, butane, ammonia, toluene, arsenic, lead, chromium, cadmium, and polonium-210 (highly radioactive carcinogen), nitrogen oxides, formaldehyde, acrolien, benzene, certain N-nitrosamines, nicotine, phenol, polyaromatic hydrocarbon
- Tobacco products can employ cellulose filters devices to assist with removal of smoke, tar and other particulate matter prior to being inhaled by the user.
- these filters do not address or mitigate the inhalation of or release into the surrounding environment of a good number of these toxic gases and chemicals.
- unfiltered tobacco products such as cigars contain no or relatively little means to mitigate the release and inhalation of these toxic materials.
- a tobacco product comprising nanocrystalline particles and tobacco.
- the tobacco product may be a cigarette or cigar wherein the nanocrystalline particles are contained within the product's paper wrapping, incorporated into, mixed, and/or directly intermingled with the tobacco, or included within a fibrous filter that forms a part of the tobacco product.
- the tobacco product comprises between about 0.001% to about 2% by weight of the nanocrystalline particles based upon the weight of the entire tobacco product.
- Exemplary nanocrystalline particles for use with certain embodiments according to the present invention include those selected from the group consisting of the oxides, hydroxides, halides, carbonates, nitrates, sulfates, and phosphates of metals, metalloids, and combinations thereof.
- the exemplary nanocrystalline particles have an average crystallite size of between about 2 to about 25 nm.
- the nanocrystalline particles may be amorphous and have an average crystallite size of less than 2 nm.
- the nanocrystalline particles have an average surface area of at least 20 m 2 /g.
- a method of reducing the level of reducing the level of undesirable components in tobacco smoke from a tobacco product comprising the step of incorporating a quantity of nanocrystalline particles into the tobacco product.
- the tobacco product may be constructed according to any of the embodiments described herein, and likewise, the nanocrystalline particles used withe the tobacco product may be any of those nanocrystalline particles described herein.
- At least a portion of the tobacco product is combusted and thereby generating tobacco smoke (including carbonaceous smoke particulates) and one or more undesirable compounds.
- the nanocrystalline particles contained within the tobacco product sorb smoke particulates and/or at least one of the one or more undesirable compounds contained in said tobacco smoke thereby preventing those materials from being taken in by the smoker or contaminating the surrounding environment.
- embodiments according to the present invention also reduce the levels of third-hand smoke contaminants deposited on surfaces exposed to tobacco smoke.
- FIG. 1 is a perspective view of a cigarette made in accordance with one embodiment of the present invention wherein the cigarette paper is coated with or has incorporated therein a quantity of nanocrystalline particles;
- FIG. 2 is a cross-sectional view of a cigarette made in accordance with another embodiment of the present invention wherein a quantity of nanocrystalline particles are incorporated into or mixed with the tobacco;
- FIG. 3 is a perspective view of a cigarette made in accordance with yet another embodiment of the present invention with the filter portion of the cigarette partially sections, the filter portion having incorporated therein a quantity of nanocrystalline particles;
- FIG. 4 is a chart depicting air filtration removal capacities for various sorbents and hydrogen chloride agent under dry conditions and 35% relative humidity conditions.
- FIG. 5 is a chart depicting air filtration removal capacities for various sorbents and acetaldehyde agent under dry and 50% relative humidity conditions.
- the main undesirable components of tobacco (especially cigarette and cigar) smoke are inorganic compounds such as hydrogen cyanide, carbon monoxide, and nitrogen oxide; aldehydes such as formaldehyde, acetaldehyde, butyraldehyde, crotonaldehyde, propionaldehyde, acrolien; ketones such as acetone and MEK; nitrogen compounds such as ammonia, acrylonitrile, pyridine, N-nitrosamines, and acrylamide; organic compounds such as polyaromatic hydrocarbons (PAHs), styrene, 1 ,3-butadiene, benzene, isopropene, toluene, phenol, fluorene, ethylene oxide, propylene oxide, and butane; and particulate phase materials such as arsenic, lead, chromium, cadmium, polonium-210 (highly radioactive carcinogen
- nanocrystalline particles that are capable of adsorbing one or more undesirable compounds released by - A - burning tobacco.
- a "nanocrystalline particle” means a high surface area particle having an average surface area of at least 20 m 2 /g and an average crystallite size of between 2 to 25 nanometers. If the nanocrystalline material is amorphous, the average crystallite size can be below 2 nm. The particle itself need not necessarily have these dimensions, but can present a much larger particle size. Rather it is the crystals that make up the particle that are nano-sized. In certain embodiments, the nanocrystalline particles exhibit an surface area of between about 100 to about 800 nm, or between about 300 to 700 nm.
- Nanocrystalline particles are prepared by conventional means or via an aerogel process described in U.S. Patent 6,087,294 and Utampanya et al., (Chem. Mater. 3: 175-181 [1991]) both incorporated herein by reference.
- Exemplary nanocrystalline materials include oxides, hydroxides, halides, carbonates, and phosphates of metals, metalloids, and combinations thereof.
- the nanocrystalline particles comprise a member selected from the group consisting of the halides, carbonates, phosphates, oxides, or hydroxides of alkaline earth metals (e.g., MgO, CaO), alkali metals, transition metals (e.g. ZnO, Ti ⁇ 2 ), and lanthanide metals, and metalloids (e.g., silicon oxides).
- the materials may be in the form of a singular component or a multi- component mixture, in the form of a powder, embedded particles in or supported on a media (i.e., paper, filter, or other components of cigarettes) or in granular or otherwise aggregated form.
- a media i.e., paper, filter, or other components of cigarettes
- Exemplary metal oxides and metal hydroxides include MgO, CeO 2 , CaO, TiO 2 , ZrO 2 , FeO, V 2 O 3 , V 2 O 5 , Mn 2 O 3 , Fe 2 O 3 , NiO, Fe 3 O 4 , CuO, Al 2 O 3 , ZnO, SiO 2 , Ag 2 O, SrO, BaO, Mg(OH) 2 , Ca(OH) 2 , Al(OH) 3 , Sr(OH) 2 , Ba(OH) 2 , Fe(OH) 3 , Cu(OH) 3 , Ni(OH) 2 , Co(OH) 2 , Zn(OH) 2 , AgOH, AlOOH (alumina oxyhydroxide) and mixtures thereof, obtained from NanoScale Corporation, Manhattan, Kansas, some of which under the name Nano Active®.
- the nanocrystalline particles may also comprise more than one metal oxide or metal hydroxide species co-solidified together (as opposed to being coated one over another).
- the nanocrystalline particles may comprise MgO/TiO 2 /Al 2 O 3 or any combination of the above-noted metal oxides and metal hydroxides.
- the nanocrystalline particle might be also utilized in a combination with activated carbon, as a simple physical mixture, coating of nanocrystalline particles onto activated carbon, coating of activated carbon onto nanocrystalline particles, nanocrystalline particles embedded into activated carbon, or any combination thereof.
- the particles may also comprise one or more reactive species stabilized on the surface of the nanoparticle. Exemplary reactive species include halogen atoms, Group IA atoms, and ozone.
- the nanocrystalline particle may also be doped with a metal species such as gold, platinum, ruthenium, rhodium, or palladium to achieve a catalytic oxidation of certain contaminants. For example, CO contained in the tobacco smoke may be converted to CO 2 through such catalytic oxidation.
- the particles may be coated to protect them from the moisture (i.e., air stable nanoparticles as disclosed in US 6,860,924 incorporated by reference herein in its entirety), coated with halogens, metal halides, or with another metal oxide/hydroxide (see, U.S. Patents 6,843,919, 6,653,519, 6,417,423, RE39,098, 6,087,294, 6,057,488, and 5,990,373, all of which are incorporated by reference in their entireties).
- air stable nanoparticles include those selected from the group consisting of MgO, SrO, BaO, CaO, TiO 2 , ZrO 2 , FeO, V 2 O 3 , V 2 O 5 , Mn 2 O 3 , Fe 2 O 3 , NiO, Fe 3 ⁇ 4 , CuO, Al 2 O 3 , SiO 2 , ZnO, Ag 2 O, the corresponding hydroxides of the foregoing, and mixtures thereof at least partially coated with a quantity of a coating material other than metal oxide coatings.
- coated or “coating” is intended to refer to coatings which only physically coat the particles, as well as those coatings which modify or react with the metal oxide surfaces.
- Preferred coating materials include those selected from the group consisting of surfactants, oils, polymers (both synthetic and natural; e.g., silicone rubber and cellulose and its derivatives), resins, waxes, silyls, and mixtures thereof.
- the construction of a tobacco product according to the present invention begins with the selection of a solid nanocrystalline particle sorbent material capable of adsorbing and/or chemically reacting with at least one undesired compound produced by burning tobacco.
- FIG. 1 depicts a cigarette 10 comprising an outer paper wrapping 12 having a quantity of nanocrystalline particles 14 coated thereupon or dispersed with the fibers thereof.
- FIG. 2 shows a cigarette 16 comprising a quantity of tobacco 18 having nanocrystalline particles dispersed therein inside of an outer paper wrapping 20.
- Cigarette 16 also includes a conventional filter 22.
- FIG. 3 illustrates yet another cigarette 24 in accordance with the present invention that comprises a filter 26 having a quantity of nanocrystalline particles 28 incorporated therein.
- Cigarette 24 likewise comprises a quantity of tobacco 30 within an outer paper wrapping 32. It is also within the scope of the present invention to provide a cigarette that incorporates two or all three features shown in the above drawings.
- the cigarette may be constructed with the nanocrystalline particle-containing paper 12, filter 26, and tobacco 18.
- the nanocrystalline particles may also be provided as granular sorbents, sorbents attached to a support, or as a bed of particles such as a packed column within the tobacco product.
- the tobacco may be in the form of relatively intact leaves (such as in a cigar) or comminuted and/or shreaded into fine particulates (such as in cigarettes).
- the tobacco product comprises between about 0.001 % to about 2% by weight of the nanocrystalline particles.
- the nanocrystalline particles resist reacting with moisture, and other components found in the environment (i.e., carbon dioxide) for a duration of up to 18 months (the shelf life of the cigarette).
- the nanocrystalline material is capable of selectively neutralizing toxic compounds while allowing nicotine to freely pass on to the user, and without significantly altering the burn characteristics of the tobacco or altering the tobacco flavors.
- the temperature range of contacting the nanoparticle sorbent with the undesired compound inside the cigarette filter ranges from ambient to 800 0 C.
- the time of contact ranges from brief (fraction of a second) to the life of smoked product, or from less than a minute to about 20 minutes.
- the present nanocrystalline particles are also capable of destruction of certain contaminants. The sequence below illustrates the destruction of aldehydes by carbonyl adsorption on surface cites of the metal oxide followed by the aldehydic hydrogen dissociation. ,
- HCN was 2.0 slpm through a bed 3 cm in diameter and having a bed depth of 1.0 cm.
- Example 2 Breakthrough tests were conducted using 870 mg/m 3 (330 ppm) of sulfur dioxide mixed with air. The tests were carried out at room temperature (19-23 0 C). A superficial gas velocity was 12 ft/min (6 cm/s) and the bed thickness was 10 mm. Tested adsorbents were granulated with granule size 12-30 mesh (activated carbons) or 16-35 mesh (nanoparticle formulations). The table below compares SO 2 breakthrough times for NanoActive® MgO
- Breakthrough tests with hydrogen chloride were conducted with an air stream containing 3100 mg/m 3 (2100 ppm) of agent at room temperature (20-25 0 C). A superficial gas velocity was 12 ft/min (6 cm/s) and the bed thickness was 10 mm. Tested adsorbents were granulated, with granule size 12-30 mesh (activated carbons) or 16-35 mesh (nanoparticle formulations). Tests for this agent were carried out at 35% relative humidity instead of 50% relative humidity used for other agents. This change was needed to avoid condensation and corrosion caused by the HCl agent in the breakthrough apparatus. FIG.
- Air filtration performance of activated carbons towards HCl was outperformed under both dry and humidified conditions.
- NanoActive® ZnO outperformed both carbons by at least 180% (two-sample T-type hypothesis test and a 95% confidence level).
- NanoActive® Al 2 O 3 Plus outperformed activated carbons by at least 332% (two-sample T-type hypothesis test and a 95% confidence level) and reached an exceptional removal capacity of (1340 +/- 270) mg/g.
- NanoActive® Al 2 O 3 Plus had greater than four times the removal capacity of the ASZM-TEDA carbon under humidified conditions.
- FIG. 5 presents the acetaldehyde air filtration removal capacities for the BPL and ASZM-TEDA carbons and the following NanoActive® metal oxides: MgO, MgO Plus, TiO 2 , Al 2 O 3 , and AI 2 O 3 Plus (previously characterized herein).
- Concentrated hydrochloric acid 28-30% aqueous ammonia, hexadecyl- trimethylammonium bromide (C 16TMABr), tetraethyl orthosilicate (TEOS), LE-4 polyoxyethylene lauryl ether, aluminum sulfate (Ab(SO 4 )J- I 8H 2 O), triethoxyoctyl silane (TES), and phenyl triethoxyoctyl silane (PTES) were purchased from Sigma-Aldrich, Sodium hydroxide, ethanol (histological) and toluene (A. C. S. grade) were obtained from Fisher.
- Tetrabutyl ammonium hydroxide (TBAOH) was obtained from Alfa Aesar. Ludox As-40 (40%wt) silica was obtained from Grace Davison. Zeolite nanocrystalline CBV 400 and CBV 8014 were obtained from Zeolyst International. Nanocrystalline titanium dioxide (NanoActive® TiO 2 from NanoScale Corporation) and trimetallic oxide (MgO:TiO 2 :Al 2 ⁇ 3 1 :2: 1) was synthesized. All chemicals were used as obtained without further purification. Sample Synthesis
- PTES hybrid mesoporous silica was synthesized according to the method reported by Burkett and coworkers. Burkett, S. L., Sims, S. D., Mann, S. Synthesis of Hybrid Inorganic- Oragnic Mesoporous Silica by Co-condensation of Siloxane and Organosiloxane Precursors, Chem. Commiin. , 1996, 1367-1368.
- An Al-ZSM-5 silicate was synthesized following the method reported by Grieken and coworkers (van Grieken, R., Sotelo, J.L., Men ⁇ ndez, J. M., Melero, J. A. Anomalous Crystallization Mechanism in the Synthesis of Nanocrystalline ZSM-5, Microporous Mesoporous Mater., 2000, 39, 135-147), except that the preparation was scaled up to twice its original scale, and TPAOH, in original literature, was substituted by TBAOH in the same molar ratio, as the former reagent was no longer carried by the original vender.
- the lest setup comprised a 245 ml gas tight glass reactor equipped with a sample holder inside for placement of the solids. All tests were performed in undesiccated ambient air. Initial experimentation showed that toluene liquid completely evaporates in the reactor within 1 h after injection, and an accurate calibration is possible within this time frame. For each test, 20 ul of liquid toluene was injected into the sealed reactor through the septum on the side arm and after 1 h a gas sample (1 ml) was taken from the reactor for analysis by GC- FID. The initial GC peak area was noted as AO.
- the reactor was then cleaned by air purging, the desired sorbent sample (0.16 g powder or 35-60 mesh granules) was loaded on the sample holder and the reactor sealed. Liquid toluene (20 ul, sorbent:toluene 10: 1 w/w) was injected into the reactor without directly contacting the sorbent. A gas sample (1 ml) was analyzed by GC-FID after Ih. The GC peak area was noted as Al . Percentage toluene removal by the sorbent was calculated using the formula 1-(A 1/AO). The instrument used was a GC-FID 5890 series II, equipped with a 30 m X 0.32 mm ID X 0.25 urn EC-Wax column.
- the temperature of the injector and the detector was 265 0 C, the heating program was 60-100 0 C (stead at 6O 0 C for 10 min, followed by heating rate 5°C/min to 100 0 C for 1 min; toluene retention time 4.7 min). Two replicates were carried out for each test.
- the dynamic test condition was designed to mimic an air filtration test system that is used in solids testing.
- the FT-IR instrument (Thermo Electron Corporation) was equipped with a 2.5 L gas cell.
- a gas circulation pump was connected to the IR gas cell by steel tubing, forming a sealable circulation pathway.
- a glass solid sample cell with filter frit was connected into the circulation pathway. All tests were performed in dry ambient air. After cleaning the test system by air purging, toluene (20 ul) was injected into the sealed IR cell, vaporized by -brief spot heating, and circulated by the pump with simultaneous IR measurements. When IR spectra intensity stopped fluctuating, integration of the band region 3160-2834 cm-1 (C-H stretch) was noted as 10.
- the pump was then turned off and the desired sorbent (0.16 g, 35-60 mesh granules) was quickly loaded into the sample cell.
- the system was resealed and the pump was turned back on, continuously circulating toluene contaminated air through the sorbent sample.
- IR spectra of toluene in the vapor phase were taken at various time intervals by an automatic Macro program continuously for 3 hours. Spectra integration of the band region 3160-2834 cm " ' at time t was noted as It. Percentage toluene vapor removal at a certain time t can be calculated using the formula l -(It/I0). Two replicates were carried out for each test.
- the container was cleaned out by air purging, injected with the desired VOC vapor so a definite VOC concentration in the container was reached (45 ppm for toluene, 50 ppm for acetaldehyde, and 100 ppm for both diethyl amine and ethyl mercaptan) and then allowed to sit for 30 min for vapor equilibration. (Time dependent control experiments indicated that 30 min is sufficient for equilibration of all VOCs tested.) Then a gas sample (2.5 ml) was taken from the container and analyzed by GC-FID. The GC peak area was noted as PO.
- the surface areas of the seven samples can be divided into four major groups: 300- 500 m 2 /g (Samples 2 and 6), 500-700 m 2 /g (Samples 1 , 5, and 7), 700-800 m 2 /g (Sample 3) and >1000 m 2 /g (Sample 4).
- Sample 2 has the lowest surface area while Sample 4 has the highest.
- Sample 1 still performed the best, with second place shared by Samples 2, 6 and 7, and third place shared by Samples 4 and 5, and Sample 3 as the least effective. Based on the performance ranking and the absolute quantities of adsorption, Samples 2 and 3 showed appreciable difference in stationary and dynamic tests).
- Samples 1 and 7 CBV 400 and trimetallic oxide
- CBV 400 zeolite
- trimetallic oxide is a better universal VOCs sorbent than CBV 400. It was also found that higher surface area does not necessarily lead to better performance of a sorbent in VOC removal.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009236334A AU2009236334A1 (en) | 2008-04-14 | 2009-04-14 | Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product |
EP09733309A EP2276359A2 (en) | 2008-04-14 | 2009-04-14 | Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product |
CA2721447A CA2721447A1 (en) | 2008-04-14 | 2009-04-14 | Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product |
JP2011505143A JP2011517574A (en) | 2008-04-14 | 2009-04-14 | Methods for neutralizing, adsorbing and absorbing toxic or unwanted compounds in tobacco products |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4475808P | 2008-04-14 | 2008-04-14 | |
US61/044,758 | 2008-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009129255A2 true WO2009129255A2 (en) | 2009-10-22 |
WO2009129255A3 WO2009129255A3 (en) | 2010-03-04 |
Family
ID=41199694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/040550 WO2009129255A2 (en) | 2008-04-14 | 2009-04-14 | Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090260645A1 (en) |
EP (1) | EP2276359A2 (en) |
JP (1) | JP2011517574A (en) |
AU (1) | AU2009236334A1 (en) |
CA (1) | CA2721447A1 (en) |
WO (1) | WO2009129255A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103393219A (en) * | 2013-08-14 | 2013-11-20 | 中国烟草总公司郑州烟草研究院 | Modified natural plant filter tip additive material capable of selectively reducing burst size of hydrogen cyanide in main stream smoke of cigarettes and preparation method of modified natural plant filter tip additive material |
US9642394B2 (en) | 2011-07-21 | 2017-05-09 | British American Tobacco (Investments) Limited | Porous carbon and methods of production thereof |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9522358B2 (en) | 2010-09-24 | 2016-12-20 | Agency For Science, Technology And Research | Porous polymer material |
US20140037534A1 (en) * | 2011-04-18 | 2014-02-06 | Qixin Deng | The Preparation of Additive Material and its Application in the Cigarette of Tobacco |
US10123560B2 (en) * | 2012-04-30 | 2018-11-13 | Philip Morris Products S.A. | Tobacco substrate |
CN103462221B (en) * | 2013-05-30 | 2015-04-22 | 贵州中烟工业有限责任公司 | Cigarette filter containing adsorption filtration layer and application thereof |
CN103462220B (en) * | 2013-05-30 | 2015-03-25 | 贵州中烟工业有限责任公司 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube, TiO2 nanometer powder and activated carbon fiber |
CN103462222B (en) * | 2013-05-30 | 2015-08-19 | 贵州中烟工业有限责任公司 | A kind of containing overlength TiO 2hydrate nanometer pipe and TiO 2the cigarette filter of nano powder |
CA3028553A1 (en) * | 2016-08-17 | 2018-02-22 | Philip Morris Products S.A. | Aerosol-generating article having novel tobacco substrate |
RU2738441C2 (en) | 2016-08-17 | 2020-12-14 | Филип Моррис Продактс С.А. | Aerosol-generating article having an improved wrapper |
US10701977B2 (en) * | 2017-08-09 | 2020-07-07 | Vuber Technologies, Inc. | Permeable element based vaporization process and device |
US11707090B2 (en) * | 2017-08-09 | 2023-07-25 | Vuber Technologies, Llc | Permeable element based vaporization process and device |
CN108903055B (en) * | 2018-08-17 | 2020-11-27 | 绍兴恒元机械制造有限公司 | Preparation method of paper cigarette filter tip |
CA3113793A1 (en) * | 2018-09-24 | 2020-04-02 | David Carl BAUER | Smoking apparatus and method |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5990373A (en) * | 1996-08-20 | 1999-11-23 | Kansas State University Research Foundation | Nanometer sized metal oxide particles for ambient temperature adsorption of toxic chemicals |
AU4406799A (en) * | 1998-05-30 | 1999-12-20 | Kansas State University Research Foundation | Porous pellet adsorbents fabricated from nanocrystals |
US6087294A (en) * | 1998-08-12 | 2000-07-11 | Kansas State University Research Foundation | Dispersion and stabilization of reactive atoms on the surface of metal oxides |
US6057488A (en) * | 1998-09-15 | 2000-05-02 | Nantek, Inc. | Nanoparticles for the destructive sorption of biological and chemical contaminants |
US6417423B1 (en) * | 1998-09-15 | 2002-07-09 | Nanoscale Materials, Inc. | Reactive nanoparticles as destructive adsorbents for biological and chemical contamination |
US6653519B2 (en) * | 1998-09-15 | 2003-11-25 | Nanoscale Materials, Inc. | Reactive nanoparticles as destructive adsorbents for biological and chemical contamination |
MY128157A (en) * | 2000-04-20 | 2007-01-31 | Philip Morris Prod | High efficiency cigarette filters having shaped micro cavity fibers impregnated with adsorbent or absorbent materials |
CN1103197C (en) * | 2000-10-16 | 2003-03-19 | 北京倍和德营养制品科技发展有限公司 | Filter tip capable of eliminating free radical in cigarette fume and its making process |
DOP2001000282A (en) * | 2000-11-10 | 2002-12-30 | Vector Tabacco Bermuda Ltd | METHOD AND PRODUCTS FOR REMOVING CALCINOGENOS FROM TOBACCO SMOKE |
RU2184086C1 (en) * | 2001-04-02 | 2002-06-27 | Петрик Виктор Иванович | Method of removing crude oil, petroleum products and/or chemical pollutant from liquid and/or gas, and/or from surface |
US6860924B2 (en) * | 2002-06-07 | 2005-03-01 | Nanoscale Materials, Inc. | Air-stable metal oxide nanoparticles |
US6843919B2 (en) * | 2002-10-04 | 2005-01-18 | Kansas State University Research Foundation | Carbon-coated metal oxide nanoparticles |
US7678367B2 (en) * | 2003-10-16 | 2010-03-16 | Kimberly-Clark Worldwide, Inc. | Method for reducing odor using metal-modified particles |
WO2005060610A2 (en) * | 2003-12-11 | 2005-07-07 | The Trustees Of Columbia University In The City Ofnew York | Nano-sized particles, processes of making, compositions and uses thereof |
US7276640B2 (en) * | 2004-10-18 | 2007-10-02 | Nanoscale Corporation | Metal oxide nanoparticles for smoke clearing and fire suppression |
US8539957B2 (en) * | 2005-01-14 | 2013-09-24 | Philip Morris Usa Inc. | Cigarettes and cigarette filters including activated carbon for removing nitric oxide |
-
2009
- 2009-04-14 AU AU2009236334A patent/AU2009236334A1/en not_active Abandoned
- 2009-04-14 CA CA2721447A patent/CA2721447A1/en not_active Abandoned
- 2009-04-14 WO PCT/US2009/040550 patent/WO2009129255A2/en active Application Filing
- 2009-04-14 JP JP2011505143A patent/JP2011517574A/en not_active Withdrawn
- 2009-04-14 US US12/423,678 patent/US20090260645A1/en not_active Abandoned
- 2009-04-14 EP EP09733309A patent/EP2276359A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9642394B2 (en) | 2011-07-21 | 2017-05-09 | British American Tobacco (Investments) Limited | Porous carbon and methods of production thereof |
CN103393219A (en) * | 2013-08-14 | 2013-11-20 | 中国烟草总公司郑州烟草研究院 | Modified natural plant filter tip additive material capable of selectively reducing burst size of hydrogen cyanide in main stream smoke of cigarettes and preparation method of modified natural plant filter tip additive material |
Also Published As
Publication number | Publication date |
---|---|
AU2009236334A1 (en) | 2009-10-22 |
WO2009129255A3 (en) | 2010-03-04 |
EP2276359A2 (en) | 2011-01-26 |
CA2721447A1 (en) | 2009-10-22 |
US20090260645A1 (en) | 2009-10-22 |
JP2011517574A (en) | 2011-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20090260645A1 (en) | Method for neutralization, adsorption, and absorption of hazardous or otherwise undesired compounds in a tobacco product | |
JP4431700B2 (en) | Catalyst for removing carbon monoxide and method for removing carbon monoxide using the catalyst | |
JP5133258B2 (en) | Smoking articles having activated carbon and sodium bicarbonate treated fibers | |
Branton et al. | Reduction of aldehydes and hydrogen cyanide yields in mainstream cigarette smoke using an amine functionalised ion exchange resin | |
JP4970252B2 (en) | Smoking goods and materials | |
WO2000025610A1 (en) | Filter for selective removal of a gaseous component | |
US6911189B1 (en) | Filter for selective removal of a gaseous component | |
AU2005280411A1 (en) | Process for the removal of heavy metals from gases, and compositions therefor and therewith | |
TWI324049B (en) | Smoking filter and smoking article | |
JP4931931B2 (en) | Tobacco added with cucurbituril and method for producing the same | |
WO2006137690A1 (en) | Filtering media for smoking and cigarette filter, cigarette and smoking device using the same | |
WO2013080812A1 (en) | Smoking product filter, and smoking product | |
JP2005245258A (en) | Filter tip containing platinum nano particles, and smoking object having the filter tip or solution of platinum nanoparticles | |
RU2702259C2 (en) | Activated charcoal granules for smoking articles | |
JP4166365B2 (en) | Cigarettes and cigarettes | |
EP2142021A2 (en) | Use of means for trapping co2 in a filter for preventing inflammation, cancer and cardiovascular diseases in a subject exposed to tobacco smoke | |
JPH07203936A (en) | Filter for removing nitrogen oxide from smoke of tobacco | |
JP6682428B2 (en) | Functionalized materials for selective removal of smoke constituents | |
US20100108083A1 (en) | Use of means for trapping co2 in a filter for preventing inflammation, cancer and cardiovascular diseases in a subject exposed to tobacco smoke | |
JP2001000165A (en) | Filter-tipped cigarette and filter for cigarette | |
RU2668752C1 (en) | Cigarette filter | |
EP2979552A1 (en) | Nanoporous activated carbons as additives in tobacco for reducing the emission of toxic products | |
US20210362124A1 (en) | Graphene based tobacco smoke filter and a method for synthesizing graphene composition | |
Radojičić et al. | Effect of type and mode of zeolite application on the cigarette filters efficiency and sorption capacity | |
RU2214776C1 (en) | Platinum filter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09733309 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011505143 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2721447 Country of ref document: CA Ref document number: 2009236334 Country of ref document: AU |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2009236334 Country of ref document: AU Date of ref document: 20090414 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009733309 Country of ref document: EP |