Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Organic component
Patent
1988-08-24
1990-01-09
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Organic component
B01J 800, C10H 2300
Patent
active
048927198
ABSTRACT:
Indoor pollutants such as formaldehyde or acidic gases such as SO.sub.2, SO.sub.3, NO.sub.x and H.sub.2 S can be removed from a house by a reactive method consisting of a coating on a furnace filter in a forced air heating system. The coating is a polymeric substance with specific functional groups which react with the pollutant and which in the case of formaldehyde or other aldehydes such as acrolein or acetaldehyde would be polymeric hydrazine or polymeric amine such as polyethylenimine, polyallylamine, or polyvinylamine. The coating is plasticized with a low volatile liquid such as glycerol in order to extend the useful life of the coating.
REFERENCES:
patent: 3681015 (1972-08-01), Gelbein et al.
patent: 4547350 (1985-10-01), Gesser
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