Filter body

Details Filter body Filter body

1987-05-20

1989-12-26

Cintins, Ivars

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210504, 210505, 210508, 210509, B01D 3914

Patent

active

048896306

ABSTRACT:
A self-supporting composite filter for ultra filtration that can be backwashed has a central porous body which supports a thin diaphragm of fine porosity applied to the outer surface of the body. The body is porous, being formed by coarse grains and a binder. The diaphragm is thin in comparison to the filter body and is formed from a mix of fine grains, fibers and binder whose percentage composition, by volume, is in the ratio 60 to 40:40 to 20:30 to 10. The fibers are thin, 0.3 to 30 microns, and long, with a length at least 10 times their width to provide a microelasticity in the diaphragm. The absolute thickness of the diaphragm is 0.2 to 2 millimeters which is 5 to 75 times smaller than that of the support body. The ratio of the specific permeabilities of the support body to that of the diaphragm, for fluids in the laminar flow range, is between 2:1 and 100:1.

REFERENCES:
patent: 3246767 (1966-04-01), Pall et al.
patent: 3327859 (1967-06-01), Pall
patent: 3573158 (1971-05-01), Pall et al.
patent: 4032457 (1977-06-01), Matchett
patent: 4528099 (1985-07-01), Rieger et al.

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