Particulate filter aid, filter bed and process
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United States of America Patent
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-
Oct 14, 1986
Issued Date -
N/A
app pub date -
Feb 19, 1981
filing date -
Sep 10, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Particulate filter aid coated with a sufficient amount of melamine formaldehyde cationic colloid to render the anionic surface of the filter aid electropositive. Preferred filter aids are diatomaceous earth, perlite and defibered cellulose. The filter aid is used in a filter bed for filtering submicronic contaminants.
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