B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/355
B01D 53/04 (2006.01) B01D 53/34 (2006.01) B01D 53/50 (2006.01) B01D 53/52 (2006.01) B01D 53/56 (2006.01) B01D 53/72 (2006.01) A62D 3/00 (2006.01)
Patent
CA 1241524
ABSTRACT Indoor pollutants such as formaldehyde 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 a polymeric amine such as polyethylenimine. In other cases it is possible to incorporate such polymeric amines into a paint which when applied to walls and ceilings can act as a reactive "sink" for aldehydes.
472473
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