Tobacco powder supported catalyst particles
AssigneePhilip Morris USA Inc.
InventorsShalva Gedevanishvili, Ping Li, Firooz Rasouli, Mohammad Hajaligol
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Abstract
Cut filler compositions, cigarettes, methods for making cut filler compositions and cigarettes, and methods for treating mainstream tobacco smoke of cigarettes are provided that use catalyst particles capable of converting carbon monoxide to carbon dioxide. The catalyst particles are supported on tobacco powder. The tobacco powder supported catalyst particles can be prepared by dry admixing the catalyst particles and tobacco powder or by combining a dispersion of catalyst particles with the tobacco powder.
Claims17
1-3. (canceled)
The method of claim 12, wherein the admixture comprises:
- a dry admixture;
- and/or
- from about 0.1 to 50 wt. % or from about 10 to 30 wt. % catalyst particles supported on tobacco powder particles.
(canceled)
6-7. (canceled)
The method of claim 12, wherein the catalyst particles:
- have an average particle size of less than about 5 μm or less than about 50 nm.
The method of claim 12, wherein both the catalyst particles and tobacco powder particles in the cigarette are each substantially moisture-free;
- and/or
- wherein the catalyst particles at least partially cover the surfaces of the tobacco powder particles;
- and/or
- wherein the admixture of catalyst particles and tobacco powder particles comprises up to about 25% by weight of the tobacco cut filler;
- and/or
- wherein the admixture of catalyst particles and tobacco powder are present in the cigarette in an amount effective to convert at least 10% of the carbon monoxide in mainstream smoke to carbon dioxide;
- and/or
- wherein the admixture comprises from about 0.1 to 50 wt. % or from about 10 to 30 wt. % catalyst particles supported on tobacco powder particles.
The method of claim 12, wherein the tobacco powder particles have an average particle size of less than 500 microns, less than 100 microns, or less than 40 microns.
The method of claim 12, wherein the cigarette comprises:
- up to about 200 mg of the catalyst particles per cigarette;
- and/or
- up to about 250 mg of the admixture per cigarette.
A method of making a cigarette, comprising:
- (i) combining catalyst particles with tobacco powder particles to form an admixture comprising catalyst particles supported on the tobacco powder particles;
- (ii) incorporating the admixture on and/or in at least one of tobacco cut filler and cigarette paper;
- (iii) providing the cut filler to a cigarette making machine to form a tobacco column;
- and
- (iv) placing the paper around the tobacco column to form a tobacco rod of a cigarette.
Dependencies are inferred from the claim text.