Ozone removal filter having manganese dioxide coated thereon
First Claim
1. 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.
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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 MnO2.
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Citations
19 Claims
- 1. 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.
- 13. 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.
Specification