Filtering medium, method for making same
AssigneeAhlstrom Research and Services
InventorsJoseph Dussaud, Leonie Bouvier, Fabien Chevalier
Life of this patent
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Abstract
The invention concerns a filtering medium based on a photocatalytic agent and activated carbon, characterized in that it comprises a permeable support covered with a first layer based on activated carbon, then a separate second layer based on a photocatalytic agent, or vice versa. The invention also concerns a method for making such a filtering medium.
Claims21
A filtering medium based on photocatalytic agent and activated carbon characterized in that it comprises a permeable support covered with a first activated carbon-based layer, then a separate second photocatalytic agent-based layer, or vice versa, the mass of the activated carbon-based layer being between 10 and 300 g/m2 and incorporating between 10 and 100% by weight of activated carbon.
A method for making a filtering medium based on a photocatalytic agent and activated carbon according to which, onto a support consisting of a nonwoven based on natural fibers and/or on organic chemical fibers, there are applied a first layer based on natural and/or organic chemical fibers and on fibers and/or particles of activated carbon, and then a second photocatalytic agent-based layer, the mass of the activated carbon-based layer being between 10 and 300 g/m2 and incorporating between 10 and 100% by weight of activated carbon.
A method for making a filtering medium based on a photocatalytic agent and activated carbon according to which, to a support consisting of a nonwoven based on natural fibers and/or on organic chemical fibers, there are applied a first photocatalytic agent-based layer, and then a second layer consisting of an activated carbon fabric, the mass of the activated carbon-based layer being between 10 and 300 g/m2 and incorporating between 10 and 100% by weight of activated carbon.
Dependencies are inferred from the claim text.