Low sidestream smoke cigarette with non-combustible treatment material

Abstract

A low sidestream smoke cigarette comprises a conventional tobacco rod and a non-combustible treatment material for the rod. The treatment material has a porosity less than about 200 Coresta units and a sidestream smoke treatment composition. The treatment composition comprises, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst. In addition, the invention provides a low sidestream smoke cigarette unit that comprises a cigarette with conventional cigarette paper surrounding a conventional tobacco rod and a non-combustible treatment material surrounding and being substantially in contact with the conventional cigarette paper. The non-combustible treatment material comprises a sidestream smoke treatment composition, wherein the non-combustible treatment material has a porosity less than about 200 Coresta units and the treatment composition comprises, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst.

1 . A furnish composition for use in making a non-combustible treatment material, with a porosity less than about 200 Coresta units, for reducing sidestream smoke emitted from a burning cigarette, said furnish composition comprising, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst.  
     
     
         2 . A furnish composition of  claim 1 , wherein said catalyst and said adjunct have an average particle size less than about 30 μm.  
     
     
         3 . A furnish composition of  claim 2 , wherein said adjunct is selected from the group consisting of clays, essentially non-combustible milled carbon or ceramic fibres, monolithic mineral based materials, essentially non-combustible activated carbon, zeolites and mixtures thereof, and said catalyst is selected from the group consisting of transition metal oxides, rare earth metal oxides and mixtures thereof.  
     
     
         4 . A furnish composition of  claim 3 , wherein said transition metal oxides are selected from the group consisting of oxides of group IVB, VB, VIB, VIIB, VIII, IB metals and mixtures thereof, and said rare earth metal oxides are selected from the group consisting of oxides of scandium, yttrium, lanthanide metals and mixtures thereof.  
     
     
         5 . A furnish composition of  claim 4 , wherein said catalyst is cerium oxide and said adjunct is a zeolite.  
     
     
         6 . A slurry composition for application to a non-combustible wrapper to produce a non-combustible treatment material with a porosity less than about 200 Coresta units, for reducing sidestream smoke emitted from a burning cigarette, said slurry composition comprising, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst.  
     
     
         7 . A slurry composition of  claim 6 , wherein said catalyst and said adjunct have an average particle size less than about 30 μm.  
     
     
         8 . A slurry composition of  claim 6 , wherein said adjunct is selected from the group consisting of clays, essentially non-combustible milled carbon or ceramic fibres, monolithic mineral based materials, essentially non-combustible activated carbon, zeolites and mixtures thereof, and said catalyst is selected from the group consisting of transition metal oxides, rare earth metal oxides and mixtures thereof.  
     
     
         9 . A slurry composition of  claim 8 , wherein said transition metal oxides are selected from the group consisting of oxides of group IVB, VB, VIB, VIIB, VIII, IB metals and mixtures thereof, and said rare earth metal oxides are selected from the group consisting of oxides of scandium, yttrium, lanthanide metals and mixtures thereof.  
     
     
         10 . A slurry composition of  claim 9 , wherein said catalyst is cerium oxide and said adjunct is a zeolite.  
     
     
         11 . A slurry composition of  claim 9 , wherein said slurry composition is incorporated with said paper from about 10% to about 500% by weight.  
     
     
         12 . A low sidestream smoke cigarette comprising a conventional tobacco rod and a non-combustible treatment material for said rod, wherein said treatment material has a porosity less than about 200 Coresta units and a sidestream smoke treatment composition comprising, in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous zeolite adjunct for said catalyst.  
     
     
         13 . A furnish composition of  claim 3 , wherein said non-combustible milled fibres are selected from the group consisting of zirconium fibres, zirconium/cerium fibres, ceramic fibres, carbon fibres and mixtures thereof.  
     
     
         14 . A furnish composition of  claim 1  further comprising a processing aid selected from the group consisting of zirconium fibres and zirconium/cerium fibres.  
     
     
         15 . A slurry composition of  claim 8 , wherein said non-combustible milled fibres are selected from the group consisting of zirconium fibres, zirconium/cerium fibres, ceramic fibres, carbon fibres and mixtures thereof.  
     
     
         16 . A slurry composition of  claim 6  further comprising a processing aid selected from the group consisting of zirconium fibres and zirconium/cerium fibres.