Novel Concepts for Gas Treatment and Gas Purification

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This patent describes a novel filter material for gas treatment and purification, especially suitable for cleanrooms. The filter material consists of activated carbon particles (preferably spherical or granular) that are coated or impregnated with at least one reactive or catalytic component. This component is a metal-containing ionic liquid (IL), which provides both chemical (chemisorptive) and physical (physisorptive) binding sites for contaminants. The combination results in a highly efficient filter system that can capture a broad range of airborne pollutants, including toxic, odorous, or hazardous gases, and is engineered so that the key adsorption and catalytic properties are retained or enhanced compared to conventional filter materials.

Use CasesContent extracted from patent full text and abstract with AI.

• Air and gas purification in semiconductor manufacturing cleanrooms to remove minute particles and trace gases.
• Medical operating rooms and pharmaceutical cleanrooms requiring ultra-pure air.
• Protective filters for civil and military use, such as NBC (nuclear, biological, chemical) protective masks and suits.
• Industrial exhaust air cleaning systems, especially for removing ammonia, sulfur compounds, halogenated compounds, and other toxic gases.
• Indoor air purification systems for sensitive environments (e.g., art conservation, laboratories).
• Adsorptive filters in ventilation or air conditioning units for public buildings or transport.
• Gas purification before analytical or production steps in chemical and materials processing.

BenefitsContent extracted from patent full text and abstract with AI.

• Greatly improved adsorption and retention of hazardous, odorous, and toxic gases, even at very low concentrations.
• Combination of physical and chemical adsorption (physisorption and chemisorption) ensures high and irreversible binding, minimizing re-release (desorption) of pollutants.
• Reduced breakthrough of unwanted gases – efficiently removes contaminants from the start, even at trace levels.
• Superior performance in moist environments—effectiveness does not decrease significantly under high air humidity.
• Broad spectrum capability—can capture a wide variety of contaminant gases (e.g., ammonia, hydrogen sulfide, halogenated gases, NOx, SO2, PCBs, etc.).
• Avoids drawbacks of traditional impregnated activated carbon, such as crystal formation or release of secondary contaminants (e.g., no iodine release as in iodide-impregnated carbons).
• Durable, thermally stable, nonflammable, and customizable by varying the ionic liquid and metal components for specific filtering needs.
• Cost-effective production and application versatility: suitable for granular filters, flat textiles, foams, or combinations with other adsorbents.

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Patent Abstract

Filter material comprises activated carbon, which is present in the form of discrete activated carbon particles, preferably in spherical- and/or granular shape, exhibiting at least one reactive and/or catalytic component, preferably metal component comprising ionic liquid containing at least one metal, preferably metal ions exhibiting metal compound.