CA2481287A1 - Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette - Google Patents

Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette Download PDF

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Publication number
CA2481287A1
CA2481287A1 CA002481287A CA2481287A CA2481287A1 CA 2481287 A1 CA2481287 A1 CA 2481287A1 CA 002481287 A CA002481287 A CA 002481287A CA 2481287 A CA2481287 A CA 2481287A CA 2481287 A1 CA2481287 A1 CA 2481287A1
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CA
Canada
Prior art keywords
partially reduced
cigarette
reduced additive
additive
conversion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002481287A
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French (fr)
Other versions
CA2481287C (en
Inventor
Ping Li
Firooz Rasouli
Mohammad Hajaligol
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Philip Morris Products SA
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2481287A1 publication Critical patent/CA2481287A1/en
Application granted granted Critical
Publication of CA2481287C publication Critical patent/CA2481287C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • 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

Abstract

Cut filler compositions, cigarettes, methods for making cigarettes and metho ds for smoking cigarettes which involve the use of partially reduced nanopartic le additives capable of acting 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 are provided. The compositions, articles and methods of the invention can be used to reduce the amount of carbon monoxide and/or nitric oxide present in mainstream smoke. The partially reduced additive can be formed by partially reducing Fe2O3, to produce a mixture of various reduced forms such as Fe3O4, FeO and/or Fe, along with unreduced Fe2 O3.

Claims (29)

1. A cut filler composition comprising tobacco and at least one partially reduced additive capable of acting as a catalyst for the conversion of carbon monoxide to carbon dioxide and/or a catalyst for the conversion of nitric oxide to nitrogen, wherein the partially reduced additive is in the form of nanoparticles.
2. The cut filler composition of claim 1, wherein the partially reduced additive is capable of acting as both a catalyst for the conversion of carbon monoxide to carbon dioxide and a catalyst for the conversion of nitric oxide to nitrogen.
3. The cut filler composition of claim 1, wherein the partially reduced additive is formed by partially reducing a compound selected from the group consisting of Fe2O3, CuO, TiO2, CeO2, Ce2O3, Al2O3, Y2O3 doped with zirconium, Mn2O3 doped with palladium, and mixtures thereof.
4. The cut filler composition of claim 3, wherein Fe2O3 is partially reduced to form the partially reduced additive.
5. The cut filler composition of claim 3, wherein the partially reduced additive comprises Fe3O4, FeO and/or Fe.
6. The cut filler composition of claim 1, wherein the partially reduced additive has an average particle size less than about 50 nm.
7. The cut filler composition of claim 6, wherein the partially reduced 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 partially reduced additive capable of acting as a catalyst for the conversion of carbon monoxide to carbon dioxide and/or a catalyst for the conversion of nitric oxide to nitrogen, wherein the partially reduced additive is in the form of nanoparticles.
9. The cigarette of claim 8, wherein the partially reduced additive is capable of acting as both a catalyst for the conversion of carbon monoxide to carbon dioxide and a catalyst for the conversion of nitric oxide to nitrogen.
10. The cigarette of claim 8, wherein the partially reduced additive is formed by partially reducing a compound selected from the group consisting of Fe2O3, CuO, TiO2, CeO2, Ce2O3, Al2O3, Y2O3 doped with zirconium, Mn2O3 doped with palladium, and mixtures thereof.
11. The cigarette of claim 10, wherein the partially reduced additive comprises Fe2O3 nanoparticles which have been treated with a reducing gas to form the partially reduced additive.
12. The cigarette of claim 10, wherein the partially reduced 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 partially reduced additive has an average particle size less than about 50 nm.
14. The cigarette of claim 8, wherein the partially reduced 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 partially reduced additive per cigarette to about 100 mg partially reduced additive per cigarette.
16. The cigarette of claim 15, wherein the cigarette preferably has about 40 mg partially reduced additive per cigarette to about 50 mg partially reduced additive per cigarette.
17. A method of making a cigarette, comprising (i) treating Fe2O3 nanoparticles with a reducing gas, so as to form at least one partially reduced additive capable of acting as a catalyst for the conversion of carbon monoxide to carbon dioxide and/or a catalyst for the conversion of nitric oxide to nitrogen, and wherein the partially reduced additive is in the form of nanoparticles;
(ii) adding the partially reduced additive to a cut filler composition;
(iii) providing the cut filler composition comprising the partially reduced additive to a cigarette making machine to form a tobacco rod; and (iv) placing a paper wrapper around the tobacco rod to form the cigarette.
18. The 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 partially reduced additive capable of acting as a catalyst for the conversion of carbon monoxide to carbon dioxide and/or a catalyst for the conversion of nitric oxide to nitrogen, wherein the partially reduced additive is in the form of nanoparticles.
19. The method of claim 18, wherein the partially reduced additive is formed by partially reducing a compound selected from the group consisting of metal oxides, doped metal oxides, and mixtures thereof.
20. The method of claim 19, wherein Fe2O3 is partially reduced to form the partially reduced additive.
21. The method of claim 20, wherein the partially reduced additive is further reduced iN situ to form at least one reduced species selected from the group consisting of Fe3O4, FeO or Fe.
22. The method of claim 18, wherein the partially reduced additive is present in an amount effective to convert at least about 50% of the carbon monoxide to carbon dioxide.
23. The method of claim 22, wherein the partially reduced additive is present in an amount effective to convert at least about 80 % of the carbon monoxide to carbon dioxide.
24. The method of claim 18, wherein the partially reduced additive is present in an amount effective to convert at least about 50% of the nitric oxide to nitrogen.
25. The method of claim 24, wherein the partially reduced additive is present in an amount effective to convert at least about 80% of the nitric oxide to nitrogen.
26. The method of claim 18, wherein the cigarette preferably has about 5 mg nanoparticle partially reduced additive per cigarette to about 100 mg partially reduced additive per cigarette.
27. The method of claim 18, wherein the cigarette preferably has about 40 mg partially reduced additive per cigarette to about 50 mg partially reduced additive per cigarette.
28. The method of claim 18, wherein the partially reduced additive has an average particle size less than about 50 nm.
29. The method of claim 18, wherein the partially reduced additive has an average particle size less than about 5 nm.
CA2481287A 2002-04-12 2003-04-07 Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette Expired - Fee Related CA2481287C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37172902P 2002-04-12 2002-04-12
US60/371,729 2002-04-12
PCT/US2003/010646 WO2003086115A1 (en) 2002-04-12 2003-04-07 Partially reduced nanoparticle additives

Publications (2)

Publication Number Publication Date
CA2481287A1 true CA2481287A1 (en) 2003-10-23
CA2481287C CA2481287C (en) 2011-08-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2481287A Expired - Fee Related CA2481287C (en) 2002-04-12 2003-04-07 Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette

Country Status (17)

Country Link
US (1) US7168431B2 (en)
EP (1) EP1494551A4 (en)
JP (1) JP4388379B2 (en)
KR (1) KR100961605B1 (en)
CN (1) CN1324999C (en)
AR (1) AR039296A1 (en)
AU (1) AU2003226302B2 (en)
BR (1) BR0309194B8 (en)
CA (1) CA2481287C (en)
EA (1) EA005980B1 (en)
EG (1) EG23501A (en)
MY (1) MY137152A (en)
PL (1) PL204274B1 (en)
TW (1) TWI328430B (en)
UA (1) UA82063C2 (en)
WO (1) WO2003086115A1 (en)
ZA (1) ZA200408011B (en)

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Also Published As

Publication number Publication date
JP2005522206A (en) 2005-07-28
AR039296A1 (en) 2005-02-16
EG23501A (en) 2006-01-22
AU2003226302B2 (en) 2009-01-22
US7168431B2 (en) 2007-01-30
EA200401361A1 (en) 2005-04-28
CA2481287C (en) 2011-08-02
AU2003226302A1 (en) 2003-10-27
WO2003086115A1 (en) 2003-10-23
US20040007241A1 (en) 2004-01-15
TWI328430B (en) 2010-08-11
BR0309194B8 (en) 2013-06-18
UA82063C2 (en) 2008-03-11
EP1494551A1 (en) 2005-01-12
PL204274B1 (en) 2009-12-31
KR100961605B1 (en) 2010-06-07
MY137152A (en) 2008-12-31
JP4388379B2 (en) 2009-12-24
TW200306790A (en) 2003-12-01
EP1494551A4 (en) 2011-01-19
KR20040099435A (en) 2004-11-26
ZA200408011B (en) 2006-06-28
BR0309194A (en) 2005-02-09
CN1324999C (en) 2007-07-11
EA005980B1 (en) 2005-08-25
CN1649519A (en) 2005-08-03
BR0309194B1 (en) 2012-10-30
PL371847A1 (en) 2005-06-27

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Effective date: 20170407