US2004025895A1PendingUtilityA1

Oxidant/catalyst nanoparticles to reduce tobacco smoke constituents such as carbon monoxide

44
Priority: Aug 31, 2001Filed: Jun 13, 2003Published: Feb 12, 2004
Est. expiryAug 31, 2021(expired)· nominal 20-yr term from priority
Inventors:Ping LiMohammad R. HajaligolEun-Jae ShinFirooz Rasouli
A24B 15/287A24B 15/28A24B 15/286A24B 15/288
44
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Claims

Abstract

Cut filler compositions, cigarettes, methods for making cigarettes and methods for smoking cigarettes are provided, which involve the use of nanoparticle additives capable of reducing amounts of at least one constituent from mainstream and/or sidestream tobacco smoke, the at least one constituent being selected from the group consisting of aldehyde, carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphtylamine, nitrogen oxide, benzene, N-nitrosonornicotine, phenol, catechol, benz(a)anthracene, benzo(a)pyrene, and mixtures thereof. Preferably, the nanoparticle additives are effective as an oxidant for the conversion of carbon monoxide to carbon dioxide and/or as a catalyst for the conversion of carbon monoxide to carbon dioxide and/or catalyst for conversion of aldehydes such as acetaldehyde and acrolein, hydrocarbons such as isoprene and/or phenolic compounds such as catechol to carbon dioxide and water vapor.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A cut filler composition comprising tobacco and at least one additive capable of acting as a catalyst for the reduction of at least one constituent from mainstream and/or sidestream tobacco smoke, the at least one constituent being selected from the group consisting of aldehyde, carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphtylamine, nitrogen oxide, benzene, N-nitrosonornicotine, phenol, catechol, benz(a)anthracene, benzo(a)pyrene, and mixtures thereof, wherein the additive is in the form of nanoparticles.  
     
     
         2 . The cut filler composition of  claim 1 , wherein the additive is capable of acting as a catalyst for the conversion of at least one aldehyde, hydrocarbon and/or phenolic compound to carbon dioxide and water vapor.  
     
     
         3 . The cut filler composition of  claim 1 , wherein the additive is selected from the group consisting of Fe 2 O 3 , CuO, CeO 2 , Ce 2 O 3 , Y 2 O 3  doped with zirconium, Mn 2 O 3  doped with palladium, and mixtures thereof.  
     
     
         4 . The cut filler composition of  claim 3 , wherein the additive comprises Fe 2 O 3 , Fe 3 O 4 , FeO and/or Fe.  
     
     
         5 . The cut filler composition of  claim 3 , wherein the additive is capable of converting isoprene and/or catechol to carbon dioxide and water vapor.  
     
     
         6 . The cut filler composition of  claim 1 , wherein the additive has an average particle size less than about 50 nm.  
     
     
         7 . The cut filler composition of  claim 6 , wherein the additive has an average particle size less than about 5 nm.  
     
     
         8 . A cigarette comprising a tobacco rod comprising a cut filler composition having tobacco and at least one additive capable of acting as a catalyst for the at least one constituent from mainstream and/or sidestream tobacco smoke, the at least one constituent being selected from the group consisting of aldehyde, carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphtylamine, nitrogen oxide, benzene, N-nitrosonornicotine, phenol, catechol, benz(a)anthracene, benzo(a)pyrene, and mixtures thereof, wherein the additive is in the form of nanoparticles.  
     
     
         9 . The cigarette of  claim 8 , wherein the additive is further capable of acting as a catalyst for the conversion of at least one aldehyde, hydrocarbon and/or phenolic compound to carbon dioxide and water vapor.  
     
     
         10 . The cigarette of  claim 8 , wherein the additive is a compound selected from the group consisting of Fe 2 O 3 , CuO, CeO 2 , Ce 2 O 3 , Y 2 O 3  doped with zirconium, Mn 2 O 3  doped with palladium, and mixtures thereof.  
     
     
         11 . The cigarette of  claim 10 , wherein the additive comprises Fe 2 O 3  nanoparticles.  
     
     
         12 . The cigarette of  claim 9 , wherein the additive is present in an amount effective to convert at least 50% of the carbon monoxide to carbon dioxide and/or at least 50% of the nitric oxide to nitrogen.  
     
     
         13 . The cigarette of  claim 8 , wherein the additive has an average particle size less than about 50 nm.  
     
     
         14 . The cigarette of  claim 8 , wherein the additive has an average particle size less than about 5 nm.  
     
     
         15 . The cigarette of  claim 8 , wherein the cigarette preferably has about 5 mg additive per cigarette to about 100 mg additive per cigarette.  
     
     
         16 . The cigarette of  claim 8 , wherein the additive is capable of converting isoprene and/or catechol to carbon dioxide and water vapor.  
     
     
         17 . A method of smoking a cigarette comprising lighting the cigarette to form smoke and drawing the smoke through the cigarette, wherein the cigarette comprises a tobacco rod comprising a cut filler composition having tobacco and at least one additive capable of reducing at least one constituent from mainstream and/or sidestream tobacco smoke, the at least one constituent being selected from the group consisting of aldehyde, carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphtylamine, nitrogen oxide, benzene, N-nitrosonornicotine, phenol, catechol, benz(a)anthracene, benzo(a)pyrene, and mixtures thereof, wherein the additive is in the form of nanoparticles.  
     
     
         18 . The method of  claim 17 , wherein the additive is selected from the group consisting of metal oxides, doped metal oxides, and mixtures thereof.  
     
     
         19 . The method of  claim 17 , wherein the additive is Fe 2 O 3 .  
     
     
         20 . The method of  claim 17 , wherein the additive is capable of reducing at least one aldehyde, hydrocarbon and/or phenolic compound to carbon dioxide and water vapor.  
     
     
         21 . The method of  claim 17 , wherein the additive is capable of reducing isoprene and/or catechol to carbon dioxide and water vapor.  
     
     
         22 . The method of  claim 17 , wherein the additive is capable of reducing isoprene.  
     
     
         23 . The method of  claim 17 , wherein the additive is capable of reducing hydrogen cyanide.  
     
     
         24 . The method of  claim 17 , wherein the additive is capable of reducing catechol.  
     
     
         25 . The method of  claim 17 , wherein the additive is capable of reducing benz(a)anthracene.  
     
     
         26 . The method of  claim 17 , wherein the additive is capable of reducing benzo(a)pyrene.

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