Ozone removal filter having manganese dioxide coated thereon
AssigneeMcDonnell Douglas Corporation
InventorsNorman R. Byrd, Reino E. Luoto
Life of this patent
Estimating the term…
Abstract
Filter for removal of ozone from air, e.g. in aircraft cabins, comprising a porous and preferably light weight and thermally stable substrate, particularly an organic polymer such as polybenzimidazole, containing a film or coating of manganese dioxide. The article can be formed by treating the substrate with a permanganate solution under conditions to reduce the permanganate to MnO.sub.2.
Claims19
A filter effective particularly for removing ozone from air, comprising a substrate formed of a porous light weight material containing a manganese dioxide coating deposited on said substrate from a permanganate solution, said substrate being a member selected from the group consisting of polybenzimidazole, a polyamide, a polyimide, a phenolic polymer, polyethylene, cellulose and derivatives and mixtures thereof.
Apparatus for removing ozone from air which comprises in combination, an air duct, a filter positioned in said air duct, said filter comprising a substrate formed of a porous lightweight thermally stable material containing a manganese dioxide coating deposited on said substrate from a permanganate solution, said substrate being a member selected from the group consisting of polybenzimidazole, a polyamide, a polyimide, a phenolic polymer, and derivatives and mixtures thereof and means for mounting said filter in said air duct for passage of air containing ozone through said filter.
Dependencies are inferred from the claim text.