Method for making polymeric filter aids and products thereof

Details Method for making polymeric filter aids and products thereof Method for making polymeric filter aids and products thereof

1978-03-24

1979-03-20

Sever, Frank

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210503, B01D 3702

Patent

active

041452844

ABSTRACT:
Improved, low-cost filter aid materials are made from polyurethane and related polymers. A foam of the polymeric material is comminuted to eliminate substantially all closed cells. The resulting particles are graded to a desired average particle size.

REFERENCES:
patent: 2770241 (1956-11-01), Winkler
patent: 2961710 (1960-11-01), Stark
patent: 3429655 (1969-02-01), Case
patent: 3538020 (1970-11-01), Heskett et al.
patent: 3557955 (1971-01-01), Hirs et al.
patent: 3630820 (1971-12-01), Leach
patent: 3658184 (1972-04-01), Davis et al.
patent: 3905910 (1975-09-01), Coombs et al.
patent: 4028255 (1977-06-01), Bolto et al.

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