Partially-carbonized polyacrylonitrile filter
OwnerGeorge Tradewell, W. Novis Smithinventors
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Abstract
A filter for extracting solids and liquids from gaseous combustion exhausts comprises a textile filter element formed of polyacrylonitrile fibers oxidized by careful heat treatment and comprising approximately 61% carbon after treatment. The filter may be woven, knitted or formed as a batting of randomly-oriented fibers. Abrasion resistant coatings and lubricants for the fibers are disclosed. The filter material is especially useful as a filter bag.
Claims13
A method for filtering pollutants from combustion exhaust, comprising the steps of:
- placing a filter bag of polyacrylonitrile fibers, oxidized and carbonized to approximately 61% carbon, in a path defined by the exhaust, the exhaust passing through the filter bag, and periodically removing accumulation of pollutants from the filter bag.
A filter for extracting solids and liquids from gaseous combustion exhaust, comprising a textile filter member formed of polyacrylonitrile fibers, partially and evenly oxidized to approximately 61% carbon by weight.
Dependencies are inferred from the claim text.