Selective gas phase filter material

Details Selective gas phase filter material Selective gas phase filter material

1975-02-07

1976-06-15

Michell, Robert W.

Tobacco

Tobacco users' appliance

Supports

131 10R, A24B 1502, A24F 704, B01D 2700

Patent

active

RE0288586

ABSTRACT:
An improved tobacco smoke filter material is formed from a porous particulate carrier impregnated with an additive having an affinity for volatile smoke acids and aldehydes, such as buffered polyethyleneimine, wherein the carrier particles have a pore diameter from 0.1 to 2.0 microns, a surface area of from about 1 to 15 square meters per gram, and a pore volume no less than about 0.3 cubic centimeter per gram.

REFERENCES:
patent: 2815760 (1957-12-01), Schreus et al.
patent: 3340879 (1967-09-01), Horsewell et al.
patent: 3410282 (1968-11-01), Walker et al.
patent: 3429318 (1969-02-01), Walker et al.
patent: 3434479 (1969-03-01), Till et al.

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