Precoat for permeability separation systems

Details Precoat for permeability separation systems Precoat for permeability separation systems

1973-05-29

1976-12-07

Spear, Jr., Frank A.

Liquid purification or separation

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

Responsive to fluid flow

210 23F, B01D 1300

Patent

active

039961311

ABSTRACT:
Procedures are disclosed for preventing fouling of reverse osmosis and ultrafiltration membranes by relatively large molecules and particulate matter. In particular, absorbents are used, with and without finely divided activated carbon, to form a "precoat" on the membrane. The "precoat" is laid down on the membrane at the beginning of a reverse osmosis or ultrafiltration cycle. It is removed at the end of a cycle by flushing, preferably followed by a cleaning. The "precoat" process is applied to the ultrafiltration of raw sewage as a preferred example.

REFERENCES:
patent: 2367557 (1945-01-01), Atwood
patent: 2470202 (1949-05-01), Wickenden
patent: 2600085 (1952-06-01), VANDyk
patent: 3101318 (1963-08-01), Watson et al.
patent: 3373056 (1968-03-01), Martin
patent: 3462362 (1969-08-01), Kollsman
patent: 3490590 (1970-01-01), Davies
patent: 3537988 (1970-11-01), Marcinkowsky et al.

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