Filter for selective removal of a gaseous component

A cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporated in the filter. The filter can remove gaseous components such as ald...

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Bibliographic Details
Main Authors KENT B. KOLLER, JOHN B. PAINE III, SUSAN E. WRENN, WILLIE G. HOUCK
Format Patent
LanguageEnglish
Published 22.05.2000
Edition7
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CIGARETTES
CIGARS
HUMAN NECESSITIES
MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ORCHEWING
MOUTHPIECES FOR CIGARS OR CIGARETTES
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
SMOKERS' REQUISITES
SNUFF
THEIR RELEVANT APPARATUS
TOBACCO
TOBACCO SMOKE FILTERS
TRANSPORTING
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Summary:A cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporated in the filter. The filter can remove gaseous components such as aldehydes from tobacco smoke. Preferred functional groups are 3-aminopropylsilyl groups covalently bonded to silica gel (APS silica gel). The reagent can be contained in a space in the filter or incorporated in one or more filter elements such as tipping paper, shaped paper insert, mouthpiece plug, solid filter element, or free-flow filter element. The reagent can be part of or coated on paper such as tipping or filter paper or incorporated in non-paper filter elements formed from fibrous materials such as cellulose acetate or polypropylene fibers.
Bibliography:Application Number: AU1240200