Tobacco-smoke filters

Details Tobacco-smoke filters Tobacco-smoke filters

1979-05-11

1981-11-17

Millin, V.

Tobacco

Smoke separator or treater

By chemical reaction, e.g., ion-exchange, chelating,...

A24D 312

Patent

active

043005772

ABSTRACT:
A tobacco-smoke filter comprises in admixture or close dispersion a first component which is a ready but weak or weakly retentive adsorbent for vapor-phase constituents, including aldehydes, of tobacco smoke, and a second component comprising amino groups, of which at least 30% are preferably primary groups, and being capable of chemically combining with said constituents to give substantially non-volatile reaction products. Suitably the first component may comprise a porous mineral earth, such as magnesium silicate or silica gel in porous granular form. The second component may comprise an ion-exchange resin or polyethylene imine. The second component may be carried upon a porous particulate material or carried or grafted upon a fibrous material or dispersed in a fibrous material carrying the second material in a dispersed condition. Alternatively, a mixture of granular first and second components may be dispersed in a fibrous or filamentary material or disposed between plugs of such material.

REFERENCES:
patent: 3550600 (1970-12-01), Horsewell et al.
patent: 4156431 (1979-05-01), Epstein et al.

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