Method for making a carbonaceous heat source containing metal oxide
First Claim
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1. A smoking article comprising:
- a carbonaceous heat source made according to the method comprising the steps of;
a) mixing a hydroxylated organic chemical, wherein the hydroxylated chemical compound is selected from the group consisting of diols and triols, and a metal oxide precursor to form a sol, wherein the metal oxide precursor is selected such that the formed metal oxide is an iron oxide, the metal oxide capable of reducing an amount of carbon monoxide produced upon combustion of the carbonaceous material;
b) heating the mixture from step a) to form a polymeric or oligomeric species containing the selected metal and organic species;
c) treating a carbonaceous material with the sol; and
d) heating the product of step e) to evaporate liquid from the sol and then decompose the polymeric or oligomeric species of the sol to form the metal oxide to form a heat source comprising the carbonaceous material and the metal oxide,wherein said carbonaceous heat source is formed into a shape which fits within the smoking article and gases flow past or through it to be heated, and,a flavor bed which is then heatable by the thus heated gases to release flavor, whereby flavor is provided to a smoker.
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Abstract
A carbonaceous heat source comprising metal oxides and methods for making such heat source are provided. The heat source has an ignition temperature substantially lower than conventional carbonaceous heat sources, while at the same time produces virtually no carbon monoxide upon combustion. The heat source is prepared by pre-forming the carbon and binder materials into a desired shape, and then treating the shape with a sol containing metal oxide precursors. The metal oxide precursors are deposited in the pre-formed carbon shape. Further treatment converts the deposited metal oxide precursors into metal oxide.
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Citations
33 Claims
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1. A smoking article comprising:
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a carbonaceous heat source made according to the method comprising the steps of; a) mixing a hydroxylated organic chemical, wherein the hydroxylated chemical compound is selected from the group consisting of diols and triols, and a metal oxide precursor to form a sol, wherein the metal oxide precursor is selected such that the formed metal oxide is an iron oxide, the metal oxide capable of reducing an amount of carbon monoxide produced upon combustion of the carbonaceous material; b) heating the mixture from step a) to form a polymeric or oligomeric species containing the selected metal and organic species; c) treating a carbonaceous material with the sol; and d) heating the product of step e) to evaporate liquid from the sol and then decompose the polymeric or oligomeric species of the sol to form the metal oxide to form a heat source comprising the carbonaceous material and the metal oxide, wherein said carbonaceous heat source is formed into a shape which fits within the smoking article and gases flow past or through it to be heated, and, a flavor bed which is then heatable by the thus heated gases to release flavor, whereby flavor is provided to a smoker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification