Particulate filter aid, filter bed and process

Details Particulate filter aid, filter bed and process Particulate filter aid, filter bed and process

1981-02-19

1986-10-14

Spear, Frank

Liquid purification or separation

Processes

Ion exchange or selective sorption

210504, B01D 1504

Patent

active

046171282

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.

REFERENCES:
patent: 2036258 (1936-04-01), Cummins
patent: 2460516 (1949-02-01), Luaces
patent: 2807556 (1957-09-01), Stark
patent: 3235492 (1966-02-01), Andresen et al.
patent: 3238056 (1966-03-01), Pall et al.
patent: 3352424 (1967-11-01), Guebert et al.
patent: 4293419 (1981-10-01), Sekino et al.
patent: 4352736 (1982-10-01), Ukai et al.
"Reverse Osmosis and Synthetic Membrane", NRCC publication (1977).

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