Selective filtration of cigarette smoke using chitosan...

Details Selective filtration of cigarette smoke using chitosan... Selective filtration of cigarette smoke using chitosan...

A - Human Necessities

24

D

A24D 3/08 (2006.01)

Patent

CA 2565112

A smoking article filter having a porous resin with a high surface area to mass ratio comprised of a chitosan derivative. PreferedPreferred embodiments include chitosan cross-linked with glutaraldehyde and chitosan cross-linked with glyoxal. The chitosan derivative provides for the selective filtration of cigarette smoke, particularly for the removal of aldehydes, hydrogen cyanide, heavy metals and carbonyls.

L'invention concerne un filtre pour article du tabac, qui comprend une résine poreuse contenant un dérivé de chitosane et présentant un rapport de la surface active à la masse élevé. Des modes de réalisation préférés comprennent un chitosane réticulé avec un glutaraldéhyde et un chitosane réticulé avec un glyoxal. Le dérivé de chitosane assure le filtrage sélectif de la fumée de cigarette, en vue notamment de l'élimination des aldéhydes, de l'acide cyanhydrique, des métaux lourds et des carbonyles.

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